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Yaesu - FT-102 User manual

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3. 20 Receiver Operation 2o 20 Shift Width Control 22 Transmitter Operation 23 SSB ata nets aibi 25 Speech Processor 4 18106101 25 Operation teesi 2546 ok ee au Ba uer EA 25 CW Spot Using Sidetone Reference 26 Operation desk ae ee ee DR 26 FPM Operations 13 nike nita acd ee ad bie ay Bae Sistema Sane oie 27 SSTLV Operations 2 V Re ER UAR EE Mid we Pe Pan 27 CIRCUIT DESCRIPTION Receiver 2 around pact et a Sedat at Aula eda beu ot 29 Transmitter Ua 31 Common ERA 33 MAINTENANCE AND ALIGNMENT 39 OPTIONAL CRYSTAL FILTER INSTALLATION 50 102 HF ALL MODE TRANSCEIVER GENERAL DESCRIPTION The FT 102 presents the amateur radio operator with a unique combination of the latest designs specifically directed toward the best receiver performance and transmitter signal purity that can be achieved with today s state of the art electronics All band coverage is provided for CW SSB and SSTV operation and AM reception while AM transmission and FM operation are pos sible when the optional AM FM unit is installed PLL frequency synthes
4. 58 470K 470K 498 aW d ALC DOG HZ6C N rats T Nh ROG 56 S6 459 GND s 2546390 2349 80 2350 85 CAPACITOR VALUES ARE pF 50wv RESISTOR VALUES ARE IN 144 AND INDUCTOR VALUES IN This Manual Provided HENRIES UNLESS OTHERWISE NOTED Courtesy of Greg p c 225 3 55 100 92 44 jonuDy 91 310N lt olo dool 222 olo m uly 31 253 wW Wig BES AOSEISZ 396181252 100 z 25 m 201 mh 9 fxpe 2 Ie e ZxGGGISI 5 1861 52 9 900 2 22229 5 it 7923 p22DA4 D oj cP OJASYA Baag JO Asayuno7 Q310N 3SIMY3ZHLO 5537 0 S3IHN3H NI 389 NI 34V S3N1WA HOLSIS3H amoG 37 NI 389 S3n1vA 301199493 39 23 00 6tH soa 396181252 Xv GGH 4180521 10 924 I 955 818 25 8 SSSISI OO 72416 MO 528 SLAW NI X8 A8 Wid 19 zor NI 17201 Odd
5. VFO 1 provides an output of approximately 4 95 to 5 55 MHz in accordance with the setting of tuning variable capacitor 001 paralleled with temperature compensating capacitors and trimmers and clarifier varactor D7001 152236 whose capacitance is varied by changes in the clarifier control voltage adjusted from the CLAR control when the CLAR function is activated on either transmit or receive Output from is fed through a bandpass filter before delivery from pin 1 of 7 001 to the Local Unit COUNTER UNIT PB 2346A The 0 5 to 1 0 MHz sample signal from the Local Unit is buffered by Qso9 28C1815Y and again by a gate Qsoos 4011 before being applied to MC14022B for gating and division by 8 Output from is then applied to pin 37 of LSI Counter 5070 36 The 25 kHz clock signal from the Local Unit is buffered by Qso92 2SC1815Y and divided by 25 and by 50 at 14518 The resulting 1 kHz output is applied to SCAN CLOCK pin 22 of Qso07 While the 500 Hz output is passed to Qsoo4 MC14518B for further division by 10 and by 50 These outputs are summed resulting in a gating pulse for and LOAD PRESET input to pin 32 of The 10 Hz out put from 2004 is also delivered through a gate in Qso05 to provide a STORE pulse to 16 of and to for gating control Preset Data for
6. 100 3l XL d 48181382 810 2 8 dV e j Qoo gt fg zv Le 5 555 ONS Ni LNW 1 3 4 81 inv 5 Av130 NIVO LAO u9W12 22S2 700 186181252 00 44181352 209 391252552 100 19 m n This Manual Provided Courtesy of Greg VA3VFO va3vfo rac ca 001 VFO I 2 5 4 5 67 8 9 9 12 502 04 8 2 UJ 05 22 82 1 DOI IS2236 0 01 RECS IE EE EE 555 rat ee UNO Zt 06332300 2 gt k P59 z lt q z 0 gt NOTE 5 CAPACITOR VALUES ARE pF 50 E RESISTOR VALUES ARE INN 1 4 or Une opor ea op 7 903 256496 1 SMI 2 39 lw 9 daxzav 250 a 29 67 o9 002 pos 10010 10010 acisov pi b 24 2 a N lt AWO coe IO KB RIO VROI gt 88 900V 199 00 2 SES 85 I ROS ROG
7. T1037 005 Q T1031 1005 1028 Preselector TDA J 3 21 Ti022 26 Band Frequency Preselect Transformer S meter Reading 7 Adjust the transformer indicated the chart for maximum S meter reading 4 000 MHz 7 000 MHz 10 000 MHz 0 14 500 MHz 21 0 21 500 MHz Maximum Remove the SSG and connect the dummy load to the ANT terminal Set to 29 5 MHz band 30 000 MHz PRESELECT to 8 key the transmitter and adjust 999 for maxi mum power output Reconnect the SSG to the ANT terminal and adjust TC 99 for maximum RX S meter indication Remove the SSG and connect the dummy load to the ANT terminal Set to 28 5 MHz band 28 500 MHz and key the transmitter Adjust the PRESELECT control for maxi mum power output and leave at this setting for the next step Repeat step 5 adjusting TC 002 C1001 1002 Solder Side 5 Tioos Se 1 Thozs T1017 Tiois Tio 15 Thois Tes he 20 Tioi 1 First Mixer 1 Tune the transceiver to 14 250 MHz and turn the RF AMP and MARK ON Adjust T o2 and for maximum S meter deflection 8 215 MHz IF Trap 1 Connect the SSG to the ANT jack on the FT 102 and tune both to 7 300 MHz With the RF AMP ON adjust the PRESELECT control for peak sensitivity 2
8. if necessary to obtain 25 watts output PLL Local Coil Connect the RF probe of the to the TP shown in the chart at the bottom of the page Set the receiver to the frequency shown and adjust the transformer indicated for the corresponding reading on the VT VM PLL Connect the VTVM set for DC to Set the receiver to the frequency indicated in the chart and adjust the corresponding coil for the indicated DC voltage on the meter FT 102 Freq 2 0MHz 7 5MHz 14 5MHz 18 5MHz 21 5MHz 30 0MHz Third Local Circuit Connect the RF probe of the VTVM to on the AF Unit Adjust transformers T4012 T4015 and T4016 for peak indication on the VTVM at least 350 mVrms Second Local Circuit 1 Connect to the RF probe of the to connector and adjust T4014 for peak indication on the VTVM 250 350 mVrm Clarifier Set the CLAR control to the 12 o clock position and the CLAR button OFF Note the display frequency and press the CLAR button ON If the display frequency changes adjust to remove the offset 1 875 MHz Trap 1 Tune the transceiver to 1 875 MHz and adjust for minimum level of the internal spurious signal PLL LOCAL COIL ALIGNMENT POINTS 1777 14 250 MHz 28 250 MHz 7 250 MHz 14 250 MHz 28 250 MHz 14 250 MHz 28 250 MHz T4011 T4010 T4001 T4002 T4003 Taoos T4005 T4006 T
9. is furnished by the band switch through encoders 12 and 14081B and by the mode selector through 011 MC14011 for a 700 Hz CW shift and plus 500 kHz for appropriate band selections Digit driver Qsoo9 and segment driver Qso19 both 5066 pass the output of to fluorescent display DSs001 9 8 while TC5066 passes mode display information to 54001 The 8 volt DC bus is regulated by Qso15 78105 to provide the 5V supply for the ICs while the 8V bus is applied directly to the DC DC converter formed by oscillator 4 28C1815Y and T5001 E142 supplying negative 10 volts DC for the display and for delivery 7006 to the 10 volt DC bus RECTIFIER A UNIT PB 2349A Power transformer 1 delivers 120 190 and 250 VAC for rectification on RECT A Unit The 120V input is rectified by Dgo9 10010 and then filtered to provide grid biases for the driver and final tubes adjusts the bias voltage for the finals and the biases are keyed as described in the CW Transmit Operation description The 190V input is rectified by 2 and 10D10 and then filtered after which a portion is pulled down to 180 VDC for screen voltage to driver 001 the RF Unit The remainder is passed through diodes Dgoo4 and 5 10010 to provide 210 VDC for the screen grids of the final amplifiers The 250V input is rectified by SMI
10. CH C47 68 pF CH IBOpF C49 120 pF CH L9 L IO Suc 2 ANT Li LLLI 4 Courtesy of Greg This Manual Provided 3229 RECTA 2 0 190 220 4 1001 250 1792 RECTA UNIT Lac 2352 8 45 6 46 5 T gt 01 2587058 a 6 468x3 MATCH PTT Qt LF e AF OUT AF UNIT 2544 DA e LAMP 141 VF 7812 AGC 2 Ni 5 901 4900 M JAY SINIYA 5019538 SAMOS st S3mwA 2 9181952 100 1500 202 1
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12. 203 TPI This Manual Provided Courtesy of Greg 3 _ Si MODE 16 BAND EXT Xr o Nes N EE S ss 5 AziWs SA gt amp ui 2520 F Tess m DAIVD yu 4g 92 n 4p m 100 2 110 20 KS a 2034 er g 2 5 2 A2 ACM2 u lt t oe I 3 sk 107 IEY x E NTC UR 652 9 1 ME o 1
13. ON in NAR wm OFF out NB 2 vss OFF out SOL ui Bases Counterclockwise FAST SLOW FAST out OFF out EA OFF out Center 12 o clock position NOTCH OFF switch out IA OFF switch out SHIFT WIDTH Center positions PRESELECT Center position BAND Desired band 2 Turn the POWER switch ON The meters and analog display should light up and the operating frequency and mode will appear on the digital display Adjust the AF gain control for a comfortable listening level and adjust the PRESELECT control for maximum receiver noise or signal level The PRESELECT control may require repeaking if the operating frequency is changed considerably When the RF AMP is OFF the PRESELECT control will not affect reception but it must always be peaked for transmission as described later 3 If an incoming signal is drifting or transmitting on a slightly different frequency the RX clarifier function may be activated by pushing the RX button The nearby LED will illumi nate and the receive frequency may then be offset up to about 2 5 kHz The digital display will now indicate the clarified receive frequency while the analog display will indicate the original frequency no offset 20 4 5 6 7 8 When pulse type noise is encountered turn the NB switch ON Now rotate the NB
14. 81S t1 ZHAOOS ZHAOOS Amateur EU ZHWOG S S 10 gt 2 2 gt Rad MS gt gt 0657 ZHWO H ZHWGE ZHWOE ZHAS2 ZHWO 21 ZHWSb GI ZHWGC Zi 7HWS Oc v OF ZHANG ZHWO 2 O8 7HWOYv 09 ZHWSeGOI 7HWGIZ 6I WY ZHW99trS 01 855 ZHW991Z 61 8SN 857 6 857 35 1286 411126 2 1612726 61226 ZHWGIZ 51496 ZHWGIZ9 GIZ9 E OI ZHWSIZ EE GIL ZE A 7HWSIZ 62 SI262 81 ZHWSIZ92 SIZ 92 41 ZHWGIZ 22 61222 J 7HWSIZS8rGI281I J 7HWSIZSI GI2GI Ot ZHWSICZCI SIZTI ZHWGIZOI GIZ6 09 2759 ZHWGIZbE GIZEE O GI ZHWGIC t2 GI 2 110 7ZHWSIZ vtl 61 61 06 091 ZHWGI2 I SI ese 850 ZHAS9Sb 851 ZHW 5128 ZHWO6SI2Z 8 ZHW99 28 ZHWUtt I2S8 ZH4SSb 855 Loo 49 21 MHz Both the 10 and 20 MHz signals derived from 10 MHz VCXO 04926 through buffer Q4o27 28C945Q The output of second premixer Q4o25 is then passed through one of two bandpass filter networks composed of T4004 through OF Taoo and Taoog for the 14 and 18 or 21 24 5 and 28 MHz bands respectively The filtered output from the appropriate bandpass filter is then buffered through and applied to PLL mixer as before Frequency and filter selection is made through diode sw
15. The double sideband modulated signal from the AF Unit is buffered by 2SKI9TMGR and passed through ceramic SSB filter to mixer 17 3SK73GR unless the speech processor is on in which case the filtered remaining sideband from is amplified by second IF amplifier also used in receive and 5 2SC1815Y a portion of the output of which is diverted to amplifier 2SCI815GR for COMP indica tion on METER I The remainder of the output from is clipped by limiter amplifier TA7060P before being applied to mixer 017 The 8 7 MHz second LO signal from the Local Unit is mixed with the modulated 455 kHz signal at 17 to produce an 8 2 MHz IF which is then filtered through in the first bank of filters and amplified by also used in receive before delivery to the RF Unit MONI A portion of the output of IF amplifier is buffered Q4944 2SC380TMY and fed to transmit monitor mixer 6 2SKI9TMY which is also fed the second LO signal from the Local Unit The 455 kHz output of 5 is then demodulated at 26 2SKI9TMY which is also fed a portion of the third LO signal from the Local Unit after buffering at Qsoi on the AF Unit The resulting audio signal from is amplified by 2 28C380TMY which also amplifies a sample of the audio output from FM detector delivered from the o
16. the SSG to 8 215 MHz and set the output level to 1004 3 Adjust T ooi and for minimum indi cation on the S meter IF UNIT ALIGNMENT PB 2343 Receiver IF Transformers 1 Tune in the MARK signal or SSG signal on any band and adjust T2001 through T2005 T2007 through T2010 and T2018 for peak S meter deflection Noise Blanker 1 Connect the set for DC to 014 and connect the SSG to 7 004 Set the SSG output for 8 215 MHz at 604 2 Set the NB LEVEL control on the front panel to the 12 o clock position and adjust T2014 and T ois for minimum deflection on the VTVM Notch Filter l Connect the SSG to the ANT terminal and set the output level to 604 at the transceiver frequency Now adjust the VFO dial to obtain a beat note of approximately 1 6 kHz 2 With the NOTCH switch ON and the NOTCH control set to the 12 o clock position adjust 1612 and VR ooi for minimum S meter deflection S Meter This alignment should only be performed later after all other receiver adjustments have been completed 1 Set the transceiver frequency to 14 250 MHz and remove any input from the ANT jack Adjust to zero the S meter METER II Connect the SSG to the ANT terminal and set the output for 404 at 14 250 MHz With the RF ON adjust if necessary to obtain a reading of S 9 on the S meter Transmitter IF With the transceiver frequency at 14 2
17. 1032 3961452 00 tOIAW m 4081 62 Q ON 26 2 8d WV Downloaded by RadioAmateur EU SSB TX iN 009 25 1815 R79 008 25 8 5 R75 R77 10K 029 56 2SCIBISYx2 034 C66 IK R7 IOOK D42 gt R200 1001892 56K R26 09 4 gt 1 16 390 15597 S 128 5 013 ese Ji DIB 4 d iF OUT 2SCIBISGRE 2SKISTM EST oe Li4 1500 lt 27185 26 0047 RIOO VRO2 uL PROC OFF PROC ON 5 COMP METER 2 0 pia 307 025 2SCI8ISGR AGC OUT Gg 22 057 AGC SLOW M RF GAIN 3 AGC IN 47K 2201 mos 15597 ob 3 196 R23 8222 IBO CI67 0047 068 RIO 100 Wr 7 0047 RIO 27K p RIO6 4 7K PIS sos Clas 100 as M 2501 5 Q 2SKI9Y 28 455 024 021 293801 25 380 L 126 3 3 3 2208 R209 127 36 00 0113 8135 i5K CI23 100P via NI ils Q22 2SCI8ISGR CAPACITOR VALUES AR
18. Transmitter audio frequency response 300 2900 Hz 6 dB adjustable No reception at 10 33 MHz fL01 fL02 Optional AM FM Unit required for AM transmission and FM operation 2 SPECIFICATIONS Third order intermodulation products Better than 40 dB 14 MHz 100 W PEP Negative feedback level Approx 6 dB at 14 MHz Frequency stability Less than 300 Hz drift during the first 30 minutes after 10 minutes warm up less than 100 Hz every 30 minutes thereafter Modulation types balanced modulator A3 A3E low level amplitude modulator F3 F3E variable reactance modulator Microphone input impedance Low 200 to 600 ohms RECEIVER Image rejection Better than 70 dB from 1 8 21 5 MHz Better than 50 dB from 24 5 29 9 MHz IF rejection Better than 70 dB AF output 1 5 W minimum 8 ohms 10 THD AF output impedance 4 16 ohms Selectivity 6 dB 60 dB SSB CW AM 2 7 4 8 kHz with no optional filters Width adjusts continuously from 2 7 kHz to 500 Hz 6 dB Options SSB nar CW wide 1 8 3 1 kHz with XF 8 2HSN filter CW nar 600 1300 Hz with XF 8 2HC filter CW nar 300 800 Hz with XF 8 2HCN filter CW nar 500 1000 Hz with XF 455C CW 270 600 Hz with XF 455CN filter AM 6 12 4 kHz with XF 8 2GA filter IF notch depth Better than 40 dB Downloaded by RadioAmateur EU Sensitivity worst case uV for 10 dB S N N ex
19. pression level of the RF speech processor NB LEVEL This control adjusts the degree of blanking by the noise blanker circuit when the NB switch is ON Turning this control clockwise actually increases the width of the blanking pulse so it should be turned clockwise only to the point where the noise is removed to avoid blanking too much of the desired signal SQL When the optional AM FM unit is installed this control will adjust the point at which the receiver is squelched during FM opera tion 9 TUNING KNOB Rotate this knob to change the operating fre quency A new VFO design is used in the FT 102 incorporating a special IC developed particularly for the circuit to provide extra stability and VFO circuit simplicity The tuning knob covers 18 kHz per revolution 10 DIAL This analog dial rotates one full revolution every 100 KHz and has markings at each 1 kHz provid ing a convenient backup to the digital display 11 Push Button Switches A AGC This switch turns the AGC voltage ON or OFF according to the needs of the operator With the AGC OFF the S meter will not function although the receiver gain can be controled manually by the RF GAIN control and the relative gain attenuation will then be indicated on the S meter B FAST SLOW When the AGC switch is in the ON position this switch selects the AGC decay rate according to the needs of the operator C ALC METER This switch when de
20. and the lives of the final tubes will be shortened SSB OPERATION Once the above tune up is completed set the MODE selector to either LSB below 10 MHz or USB the MIC GAIN control to the 12 o clock position and the METER SELECT switch to IC Connect the microphone to the MIC jack and depress the PTT switch at the microphone Speak into the microphone the word four while observing the ALC indication on METER II Now press the ALC METER button to activate the peak hold system and note whether the ALC indication is beyond the black zone at the left side of the ALC scale on METER II while speak ing The needle will hold position for about one second before dropping so if the needle deflects into the red zone reduce the MIC GAIN slightly and speak into the microphone again to obtain another reading This technique can be repeated until the ALC indication is exactly at the high edge of the black zone For VOX operation advance the VOX GAIN control gradually while speaking into the micro phone normally without depressing the PTT switch until your voice activates the transmitter If audio from the speaker trips the VOX with headphones disconnected advance the A TRIP control the rear panel slightly clockwise DELAY control may be adjusted to obtain the desired VOX delay before automatically switching back to receive after you have finished speaking For stable operation of the VOX do not advance th
21. function as an independent receive antenna during transmit 4 RF OUT This RCA jack provides low level transmitter output for a transverter Output signal level is approximately 6dBm 0 1Vrms at 50 ohms 5 FUSE This fuse holder may be opened with a Phillips screwdriver to replace the fuse The fuse is a 6 Amp type 3 Amp for 200 234V operation and must not be replaced with any other value except when changing the operating voltage as illustrated on page 16 6 AC This three pin connector accepts the AC line cord Before connecting AC power make sure that the line voltage to be used agrees with the voltage that the FT 102 is wired for If it is not rewire the FT 102 power transformer for the available voltage as shown on page 16 Never connect any DC vol tage to this connector 7 EXT VFO Use this DIN jack to connect an external VFO such as the FV 102DM to the transceiver 8 RCVR An external receiver may be connected to this 7 pin DIN jack for muting sidetone and scanning control signals from the FT 102 This jack is also used for the FV 102DM VFO which then accepts external receiver system connections This Manual Provided Courtesy of Greg VA3VFO va3vfo rac ca II _ 9 This 6 pin DIN jack provides access to the control circuitry for connection of a transverter 10 ACC 2 This 5 pin DIN jack provides T R switching and ALC control input connections for interconnection
22. gt Figure 4 16 2 3 J2o14 P21 2001 P Jz013 P20 Ee 228 J2002 Ps O Jzoos P GREEN J2012 Pi9 BLUE J2oos P1o Pss YELLOW C 2 4 1 J2010 P17 15 J2ooz Pi4 1 YELLOW 1 1 This Manual Provided Figure 5 Courtesy of Greg VA3VF va3vfo rac ca 51 AM FM UNIT INSTALLATION Parts needed AM FM kit D3000184 including one AM FM Unit C0023470 and four M3 x 8 screw 004308001 1 Place the FT 102 upside down on the work surface and remove the six screws and the bottom sub panel as shown in Figure 1 2 Install the AM FM Unit using the four screws supplied with the kit as shown in Figure 2 3 Remove the plastic covers from the two connectors indicated in Figure 2 and connect them to the AM FM Unit as shown 4 Installation is now complete Operation is described in the FT 102 Instruction Manual No alignment should be required as the AM FM Unit was completely aligned at the factory This Manual Provided Courtesy of Greg va3vfo rac ca Figure Figure 2 Downloaded by ul 5 d x RF UNIT PB 2342A P4 asc 0 Co4 1001 ET TX 12 3 3 2 500wv TCO2 10P TCO RLOS RLO4 RLO3
23. let the final amplifier cool in the receive mode for one or two minutes Whenever transmitting in any mode never change the setting of the MODE or BAND selectors as severe damage to the transceiver may result These selectors may only be changed when receiving 5082 Make sure that a 50 ohm load is properly connected to the coaxial ANT jack This may be a dummy load or an antenna that is resonant at the trans mitting frequency Never transmit without a load but when using an antenna always make sure that the operating frequency is clear of other signals before tuning up or transmitting 1 Preset the controls and switches as follows HEATER OFF MODE TUNE OFF out PROC 22522055 OFF out VOX GAIN Counterclockwise DELAY Counterclockwise MICGAIN Counterclockwise Counterclockwise OFF out X er OFF out METER SELECT IC position PRESELECT Midrange DRIVE Counterclock wise BAND As desired Match with band LOADING 0 Turn the POWER and HEATER switches both ON Wait one minute for the tubes to reach operating temperature 2 3 When tuning into a dummy load turn the MARK switch rear panel and the RF AMP ON tune the transceiver to the nearest MARK frequency and adjust the PRESELECT control for peak indication on
24. 12 and then filtered before delivery as 300 VDC to the plate of driver on the RF Unit 37 RECTIFIER UNIT PB 2350 Bridge rectifier D1 S4V10 on the main chassis delivers 15 volts DC to this board where it is filtered and regulated by 28A733 0 50 uPC78L12 and Q1 2SB705R on the main chassis providing 12 VDC as the general VCC supply to all other Units and to the cooling fan through the HEATER switch On the main chassis a portion of the 15 VDC present at the emitter of Q1 is diverted to regulators and Q4 uPC7812H Q3 thus providing 12 VDC for the panel lamps and Q4 providing 12 VDC to pin 2 of the EXT VFO jack on the rear panel for the external VFO supply AC voltage from the heater winding of the power transformer is rectified by Dssos 06 and filtered by capacitor 5 9 where the filtered 15 VDC from bridge rectifier D1 is added to result in about 26 VDC This voltage is regulated by Qss03 2SC496Y and zener diode Dg59 AWOI 24 to provide 24 VDC for the receiver front end circuits on the RF and IF Units A portion of the 24 VDC is further regulated by 5 781 15 to provide 15 VDC for the Width Control system During transmission 12 VDC is applied Qgs5o4 28C1815Y which then grounds the base of Qsso3 dropping the 24 VDC and 15 VDC lines to zero and thus disabling the sensitive receiver front end and the Shift Width function The power transformer 320
25. 5015 Qsoos DSs001 4 w COUNTER UNIT RECT B UNIT 49 OPTIONAL CRYSTAL FILTER INSTALLATION Part s required one or more of the following SSB narrow filter XF 8 2HSN H1102058 CW filter XF 8 2HC H1 102057 CW filter XF 455C H1102053 CW narrow filter 8 2 1102056 CW narrow filter XF 455CN H1102054 AM filter XF 8 2GA H1102055 1 Disconnect the transceiver from the power source Remove the two screws attaching the carrying handle and then the 14 screws attaching the top and bottom covers as shown in Figure 1 Remove the handle and covers 2 Remove the six screws attaching the IF Unit located at the left side of the chassis when viewed from the front Figure 2 3 Lay the FT 102 on its right side so that by carefully lifting the edge of the IF Unit the solder side of the board can be accessed It may be necessary to disconnect some of the connectors in which case refer to Figure 5 and take careful note as to where each should be replaced 4 Referring to Figure 3 install the filters one at a time from the component side of the board soldering each into place from the solder side Make sure to position the filter s label s facing as shown 5 Now referring to Table 1 and to Figure 4 locate and remove the jumper wire associated with each filter location into which a new filter was just installed These jumpers are on the solder side of the board 6
26. E This Manual Provided z Courtesy of Greg VA3VF O va3vfo rac ca n This Manual Provided Courtesy of Greg va3vfo rac ca LOCAL UNIT PB 2345 4 03 10 5434 XO4 10 5466 2 082 167 136 15 50 it L 35 RI38 15K RI34 RI56 68K 3rd LO OUT P50 072 RIT4 470 y cias gt 039750182 025 067 3SK73GR 330K 86 3 iOOK 0175 15 RI46 IOOK RI48 R9 220 R72 560 P47 20410 OUT P48 RI24 27K x02 19215MHz Dt 22 RI69 4 7K 086 089 151555 4 220K RIO2 220K R73 12k C108 10 M RIS 68K 820 RIB8 270 RI64 18K M 207 RII4 47K R 75 IOK RI77 22K T 2 45 P42 lt H 34 RIT8 22K EXT vFO IN CLAR VR 558 CW 2 z o 4 m TRANSISTORS ARE 2SC945Q UNLESS OTHERWISE NOTED DIODES ARE 15553 UNLESS OTHERWISE NOTED CAPACITORS ARE IN OO yF UNLESS OTHERWISE NOTED CAPACITOR VALUES ARE IN pF 50wv RESISTOR VALUES ARE OQ 1 4 AND INDUCTOR VALUES ARE IN HENRIES UNLES OTHERWISE NOTED MARKER COUNTER RELAY 2354 0 18 uH C45
27. FL 2100Z ALC 102 2 PN T9101 285 OPTION PIN B 1 1 inner conductor FL 2100Z RY 2 ALC RY outer conductor GRAY 3 RY inner conductor 4 ALC RY outer conductor 5 FT IO2 EXT SP SP 102 T9101275 OPTION C FC 102 DC 12V T9101220 OPTION FT 102 12V D E e 2 PIN PIN No 1 TX GND 1 ALC 2 1 2 GND 3 100kHz REF OUT 3 TX GND c N C 4 GND 5 RX GND 3 5 RX GND 6 GND Shell GND Shell GND L 1 4 ACC 2 PIN No 1 8V 1 UP 2 4 12V 2 FAST 3 500 2 3 GND 4 TX 12V 4 DWN 5 CW8V 5 6 EXT VFO IN 6 SIDE TONE OUT 7 GND 7 100kHz OUT 8 SAMPLE IN EXT VFO RCVR EXT VFO RCVR B This Manual Provided Courtesy of Greg VASVFO va3vfo rac ca 15 ane Ri 1 1 1 5 5 4 E E E INSTALLATION The FT 102 is designed to be a single unit station for fixed or portable operation from AC power Power supply connections providing for operation from a variety of source voltages are available Please read the following sections carefully so as to ensure proper installation of your new transceiver PRELIMINARY INSPECTION Upon opening the packing carton immediately give the transceiver a thorough visual inspection Check to see that all controls and switches are working freely and inspect th
28. If the speaker is used for monitoring audio feedback may cause oscillation or unstable VOX operation requiring careful adjustment of the AF gain MIC GAIN and VOX GAIN controls This feedback can be avoided by use of head phones 8 Miniature Knobs These six knobs are normally pressed into a re cessed position in the front panel conveniently placing them out of the way when adjustment is not required To adjust these controls press and release the knob you wish to adjust and it will then pop out to a convenient position Simply press the knob again to return it to the recessed position A VOX GAIN This control adjusts the sensitivity of the 6 B C D E F VOX voice actuated transmit circuit Clock wise rotation increases the sensitivity of this circuit to the microphone input For CW testing or code practice by rotating the VOX GAIN control fully counter clock wise you can monitor your CW keying via the sidetone oscillator without transmitting over the air DELAY This control adjusts the delay of the VOX switching circuit controlling transmit to receive switching for use during VOX operation or for semi break in CW delay MIC GAIN This control sets the gain of the microphone audio amplifier in the transmitter during SSB AM and FM operation Clockwise rotation increases the gain COMP During SSB transmission when the PROC switch is ON this control adjusts the com
29. LEVEL control to an effective point The best setting of the noise blanker is the point at which the noise pulses just disappear to allow copying of the signal Whenever strong signals are encountered or band noise is high enough to keep the S meter above several S units the RF AMP may be switched off thereby increasing the superb strong signal handling capability of the receiver The RF gain control normally kept at its most clockwise position may be adjusted to provide additional attenuation and a preset AGC level which will be indicated on the S meter This will serve to block those signals weaker than the preset S meter level while passing stronger signals AGC time constant selection is accomplished by the FAST SLOW switch when the AGC switch is ON The FAST SLOW switch will have no effect when the AGC switch is OFF and the S meter will also be disabled except for RF gain indication as mentioned above Adjust the TONE control to obtain the most pleasing audio for the particular mode of operation and speaker or headphones in use Different speakers and headphones have dif ferent audio response characteristics which can be compensated by this control while the different bandwidths used for different modes may have their associated bassiness or hissing attenuated When an interfering heterodyne appears such as from a broadcast station CW signal or tuner upper during SSB operation a beat betwe
30. METER II If using an antenna turn the RF AMP switch ON and tune the PRESELECT control for a peak in background noise or for a peak on the S meter of a signal on a nearby frequency 4 Momentarily depress the MOX switch or PTT switch on the microphone if connected and observe the IC indication on METER I If you pressed the MOX switch you must press it again to return to receive The meter should indicate approximately 75 to 80 milliamperes final grid bias If the indication is far from this range BIAS ADJ potentiometer on RECT A Unit PB 2352 should be ad justed after the tubes have fully warmed up This Manual Provided Courtesy of Greg VA3VFO 7 ya3vfo rac ca 5 Set the DRIVE control to about the 9 o clock position Key the transmitter and adjust the PRESELECT control slightly while watching the IC indication on METER I for a peak reading then return to receive It may be necessary to increase the DRIVE control slightly beyond the 9 o clock position to obtain a discernable peak For the following steps we strongly recommend that tune up transmissions be limited to about five seconds each A simple way to accomplish this is to first place the fingers of your right hand on the control that is to be adjusted before keying the transmitter Adjust the control slightly back and forth while watching the indication on METER I for the desired dip or peak make sure you know which This should be done qui
31. RLO2 RLO 2SKI25Y 808 LS 5 o Rx FP dio C554 u 005 po yo EZ 5 IF OUT 2 25197 009 c54 1004 eSKI25Y 156 1 GND C74 LIO 25 1589 RIS 330 518 545 1 NB OUT C69 107 T30 851 82 20 2 8 GND RX OUT Tw 7 77 25 125 82 o T37 J m 007 4 4 Ist LO IN 25 2407 SP 008 5 amp T32 401 P S R23 40 822 10 TEN 9 GND 1505 olt OLSN a 6 HEATER 5 HEATER 511 LII Lc ul HN gt 5 5 AUXO BAND SW a AS US II C ME CORNER ENE 2900 0245 28 0 _ CAPACITOR VALUES ARE IN uF 5Owv RESISTOR VALUES ARE IN a aw K UU J ee S gt AND INDUCTOR VALUES ARE IN HENRIES UNLESS OTHERWISE NOTED This Manual Provided Courtesy of Greg VASVFO GALON 3SIMYBHLO SS3INN S3INN3H NI 38V SINIYA ONY Ab l NI 38V S30 vA 80151538 SAMOS at NI 34v S3NIWA Z 1 SS3INN 669161 53000 1 310N 3LOW MS 1 34084352 lt gt 114 320 ALZ
32. Reconnect any connectors removed from the IF Unit according to Figure 5 and replace the six screws holding the IF Unit in place 7 Switch the FT 102 on and check the CW and or SSB modes with the NAR switch on and off to ensure that the installation is correct and functioning 8 Disconnect the power to the transceiver replace the covers and handle and associated screws and reconnect the power source Installation is now complete This Manual Provided Courtesy of Greg va3vfo rac ca 50 ES FILTER LOCATION REMOVE JUMPERS AM FILTER 5 558 XF 8 2HSN CW TITER XF2004 8 4 8 2 CW FILTER XF 8 2HC or XF2003 XF 455C or XF2005 455 XF 8 2HCN CW FILTER Either a narrow SSB or wide CW filter may be installed here Table 05 N3SNW 5 7HW6SIZB 49 NOH 8 3X341 B Q11 02 N3SNW nS3VA 41 05 053 ON ON THWSLZ 8 42 28 49 Era 8 3 WALA 2 8 3 341 gt ORIGINAL G17 00 NISNW NSAVA ON THWStZ 8 32 SH 33441 819 455 YAESU MUSEN 5 a EY E 21 um 2 gt ere 2 P G11 OO N3SnW nS3vA UR NASNW NS3VA ON o 2305 ZHWSIZ 8 20 NSHZ 8 3X3441 2 8 3 7410 09 N3SNW NS3IVA 29006512 8 32 SH Z 8 3X3441
33. TONE This control adjusts the high cut audio filter in the receiver audio amplifier Counterclockwise rotation attenuates high frequencies 13 METER SELECT This selector switch determines the function of METER I 26 for monitoring transmitter para meters It may be switched during transmission without causing damage to the circuitry HV In this position METER I will indicate the value of the high voltage present at the anodes of the final amplifiers on the innermost scale in hundreds of volts IC With the METER SELECT switch in this position METER I will indicate the sum total of the current through the cathodes of the final tubes on the outermost scale in milliamperes PO This function allows the meter to provide a relative indication of the output power to the antenna jack As the indication is relative no specific meter scale is provided This position will cause the meter to indicate the compression in decibels of the speech processor when used for SSB transmission on the second from outermost meter scale 14 NOTCH push button This switch activates the IF notch filter when depressed 15 NOTCH APF controls NOTCH When the IF notch filter is activated this inner knob tunes the center frequency of the IF notch across the IF passband Its adjustment is independ ent of the VFO frequency IF shift width setting and the APF frequency APF When the APF circuit is ac
34. VAC winding connects to the Rectifier B Unit where the AC is rectified by Dssoi through 10010 and then doubled by capacitors C5 and on the main chassis to result in 900 VDC for the plate circuit of the final amplifiers Also when a plug is not inserted into the EXT VFO jack on the rear panel 8 VDC is delivered from the 8 VDC supply bus regulated from the 12 VDC VCC bus by Q2 14308 the main chassis to zener diode Dssos pro ducing 6 VDC for delivery to the VFO Unit This Manual Provided Courtesy of Greg vadvfo rac ca RECT A UNIT 2349 METER SET E ss VR BIAS SET a IF UNIT PB 2343B UNIT 23428 COUNTER UNIT PB 2346B AM FM UNIT VFO UNIT OPTION PB 2348 PB 2347A AF UNIT PB 2344B LOCAL unit aer I sa o r ote PB 2345 V 20 0 9 23504 BOARD AY j g PB 2355 NI ge x 4 VR Provided This Manual Pr BOTTOM VIEW Courtesy of Greg VASVFO va3vfo rac ca m MAINTENANCE amp ALIGNMENT The following Alignment Procedure for the FT 102 is divided into two separate sections The first section covers the various alignments and adjust ments that may be made by the owner as these do not require sophisticated test equipment outside of the FT 102 itself and standard tools and equip ment normally found in the ham shack The se
35. be used to provide semi break in operation with the DELAY control providing adjustment of the T R switching delay Alternatively T R switching may be accomplished by the MOX button or by an external control such as a footswitch connected to the PTT jack on the rear panel The CW sidetone may be activated by pushing the MONI button ON Sidetone pitch can be adjusted by VR3oos accessible through a hole in the bottom cover while sidetone volume can be adjusted by For receiving various optional narrow CW filter configurations may be installed and activated by pushing the NAR button The SHIFT WIDTH controls may also be used to select the desired passband or the APF filter can be activated for very narrow filtering CW SPOT USING SIDETONE REFERENCE The CW pitch potentiometer may be used to align the CW sidetone for CW spotting purposes The correct alignment procedure will be shown then the operation technique outlined 1 Connect a receiver or transceiver to the FT 102 EXT ANT jack When using a trans ceiver such as the FT 901DM connect the cable from the FT 901DM RCV ANT jack to the FT 102 EXT ANT jack 2 Connect a dummy load to the FT 102 ANT jack Set the MODE switch to CW 3 Set the FT 102 to 14 100 MHz and likewise set the external receiver to 14 100 MHz Push the MARK button to activate the calibrator signal 4 Tune both the FT 102 and the external receiver so that a comfortabl
36. delivered to the input of FM receive detector for IF monitoring of transmitted FM signals ALC CIRCUIT RECT A UNIT 2349 and IF UNIT PB 2343A On RECT A Unit the grid bias to the final power amplifiers is sampled by Qgoo4 28C2229 re sulting DC voltage appears whenever the grids of the final tubes are driven positive with respect to the bias voltage as grid current then begins to flow through Rso21 appearing as a voltage drop that is then amplified by for delivery to the IF Unit This Manual Provided Courtesy of Greg va3vfo rac ca On the IF Unit a portion of this ALC voltage is fed to one gate of second IF amplifier varying the gain of this stage to limit the drive level to the RF Unit and final amplifiers during trans mission The incoming ALC voltage is also ampli fied by Qyo29 2SKI9BL a portion of whose output is applied through meter amplifiers Q2031 25 19 and 25 564 for delivery through relay to METER II during transmission The remainder of the output from 2 is buffered by 2SC1815Y and amplified by DC amplifiers and 05035 2SA564AR which together with 25 1815Y make up the peak hold circuit Q2030 gives a constant voltage output proportional to the charge retained at capacitor C155 which is charged by the ALC voltage from when the ALC METER Peak Hold switch
37. on the front panel is depressed The constant output from is then fed to meter amplifier in the same fashion as normal ALC for meter indication COMMON CIRCUITS LOCAL UNIT PB 2345 For the following description refer to the Local Unit Block Diagram and the Frequency Relation ships chart on the following pages Bandswitching signals from the BAND selector are delivered through the Counter Unit to 74001 on the Local Unit selecting one of the six VCOs Q4001 through Q4006 28C945Q for the band of oper ation The selected VCO oscillates at the first LO frequency and provides output through buffer Q4o0o 2SC535B to buffer 25 2407 which is also controlled by the unlock signal provides first LO output at 74002 for deliv ery to the RF Unit A portion of the VCO signal is buffered by 11 28C535B and applied to PLL mixer SN76514 which also receives a 13 715 to 34 215 MHz PLL local signal from buffer 28C535 B whose frequency is determined by the band mode IF Shift and VFO setting for the operating frequency The 1 0 to 4 0 MHz output from PLL mixer 4 12 is then passed through a bandpass filter and buffered by and 401 28C535B This Provided Courtesy of Greg VAS VF 0 va3vfo rac ca 33 before being fed to programmable divider Q4o17 7415192 is programmed by band switching signals to provide an ou
38. the noise blanker circuit on the IF Unit and the FM receiver circuit in the AM FM Unit if installed through all operate from the 24 VDC supply This Manual Provided Courtesy of Greg va3vfo rac ca IF UNIT PB 2343A The 8 2 MHz IF signal from the RF Unit is ampli fied by first IF amplifiers and 2SK125Y which are also operated from the 24 VDC supply to maintain excellent large signal handling performance The amplified first IF signal is then passed through the noise gate composed of Schottky diodes D901 D2002 15597 varactor D2003 FC63 before being applied to the first set of crystal filters SSB and CW signals are passed through 2 9 kHz BW 8 pole crystal filter XF 8 2HS while AM signals are passed through optional 6 kHz BW 3 pole monolithic ceramic filter XF 8 2GA when installed is not installed AM signals pass through 01 When the NAR button is pressed on the front panel CW signals are next passed through one of the optional narrow second filters in loca tion 600 Hz BW 8 pole crystal filter XF 8 2HC 300 Hz BW 8 pole crystal filter XF 8 2HCN depending upon which is installed Also when the NAR button is pressed in the SSB mode SSB signals are passed through one of the optional narrow SSB second filters in location another 2 9 kHz BW 8 pole crystal filter XF 8 2HS or 1 8 k
39. with a linear amplifier 11 RCA JACK BOARD A AUX This is an extra jack with no internal con nections provided for the operator s conve nience It may be easily wired to suit the needs of a particular station setup or for special operating requirements B PATCH This jack provides for audio input to the transmitter for connection of a phone patch such as that contained in the SP 102P C IF OUT 2 This jack provides wideband IF output from an early stage of the receiver for connection to a bandscope or spectrum analyzer D AF OUT Constant level audio output from the receiver is available here for recording purposes Signal level is approximately 400mV at 50k ohms and is unaffected by the AF GAIN and TONE controls on the front panel E PTT This jack is connected to the push to talk switching line allowing external control of transmit receive switching such as via a footswitch The transmitter is activated whenever the center contact of this jack is connected to ground F IF OUT 1 The receiver s narrowband 2nd IF signal can be monitored via this jack using a monitorscope 11 EE M Dr i 12 A PO ADJ B This potentiometer adjusts the sensitivity of METER I when used as a PO power output indicator At the factory this control is preset to provide 80 deflection of the meter when the transmitter is tuned for maximum power output into
40. 2 D3005 15597 The balanced modulator also receives a 455 kHz LO signal from the Local Unit after buffering by 17 2SC1815Y and the resulting modulated IF is delivered to the IF Unit VOX ANTI TRIP AF UNIT PB 2344 A portion of the amplified speech signal from is amplified for VOX operation by 1 2SC1815Y and then rectified by D3014 1360 to produce a DC voltage whose level varies with the speech input at the microphone This DC is ampli fied at 11 25 1815 and further amplified at Qs ai 2SC1815Y before being applied to switch 28A733 The switched output of then controls a Schmitt trigger composed of Qsois and 28 1815 which in turn switches relay control 15 2SA496Y to drive T R relays RL1 and RL2 on the main chassis The anti trip signal is derived from a sample of the output from audio amplifier 25 or from an external source via the A TRIP IN jack on the rear panel This signal is amplified by 25 1815Y and then rectified by D3011 to produce a DC voltage whose level varies with the audio output from the receiver This DC is amplified by 28 1815 and 28A733 before being fed into the VOX control circuit at 12 to counter the VOX DC voltage that may be pro duced by audio at the microphone This Provided Courtesy of Greg va3vfo rac ca IF UNIT PB 2343A
41. 2166 MHz on the counter 1 3 Repeat steps 1 and 2 until the counter shows the exact frequency indicated for each mode Shift Width Tracking 2 1 Connect the frequency counter to 7 and preset the SHIFT WIDTH controls to their center positions Set the MODE selector to AM and connect the frequency counter to Key the transmitter and check the counter for 10 545 MHz 1 kHz Connect the counter to and key the transmitter while checking for 19 215 MHz 1 kHz SSB Carrier Point 2 Set the MODE selector to LSB and check for a frequency of 10 5434 MHz on the counter l 3 Rotate the SHIFT WIDTH controls 90 clockwise record the counter frequency and 2 calculate the difference between this and the frequency noted in step 2 3 4 Connect the frequency counter to return the SHIFT WIDTH controls to their center positions and note the counter fre quency For LSB this should be 19 2134 MHz 4 5 Repeat step 3 using the frequency noted in step 4 6 Compare the two difference frequencies calculated in steps 3 and 5 and adjust VRaoo4 5 if these frequencies are not the same Repeat the above procedure after adjustment of VRaooa This Manual Provided LOCAL UNIT Courtesy of Greg VA3VFO va3vfo rac ca 42 Set the MODE selector to USB and connect the frequency counter to Key the transmitter and adjust potentiom
42. 4007 T4008 T4009 T4011 T4010 Peak repeak after T4009 below x a n Peak 40 50 mV rms avoid resonance at 20 MHz 8 approx 100 mV rms avoid resonance at 30 MHz 200 300 mV rms 5 25 ES va3vfo rac ca RF UNIT ALIGNMENT PB 2342 Connect the sweep generator output to Jioo1 TX IN and connect the oscilloscope to RF OUT jack J on the rear panel Turn the HEATER switch OFF Key the transmitter and adjust the appropri ate transformer for each band according to the the following chart to obtain the correct 3dB bandwidth with minimum ripple as dis played on the scope Ripple should not exceed 3dB 1 8 2 0 MHz 3 5 4 0 MHz 7 0 7 3 MHz 10 0 10 5 MHz 14 0 14 5 MHz 5 18 0 18 5 MHz HR 21 0 21 5 MHz 24 5 25 5 MHz 28 0 29 9 MHz 10117 022 1013 1014 1015 1016 017 1018 1019 0217 023 1025 1026 1027 1028 Connect the SSG to the ANT terminal or alternatively switch the MARK signal ON rear panel switch Set the FT 102 to the band and frequency shown in the following chart and set the PRESELECT control to the position indi cated Switch the RF AMP ON Tioos 1001 RL 002 1 002 Qioo1 Q 009 RL 003 RLi 004 XF iooi 29
43. 50 MHz connect the audio generator to the MIC jack and apply a 1 kHz tone at 10 mV Con nect the dummy load to the ANT jack In the SSB mode tune the transmitter for about 50 of maximum power output and then with the PROC OFF adjust T2005 T2006 T2013 and T2017 for peak power out put indication reduce the MIC GAIN if nec essary to retain about 50 of full output Press the PROC button and adjust T2011 and T2912 also for peak output power ALC Meter With the same setup as step 1 of the Trans mitter IF Alignment and the MODE selector in USB set the MIC GAIN control fully counterclockwise Q3013 Q3011 J3010 J 3006 Set the ALC METER switch to OFF key the transmitter and adjust to the thre shold point where the ALC indication on METER II is just at the edge of the left end of the scale Advance the MIC GAIN control also to the threshold point where ALC indication just begins and tune the PRESELECT LOADING and PLATE controls for maximum power output Again set the MIC GAIN control to the ALC threshold point Now increase the output level of the audio generator to 30 mV Adjust if neces sary to obtain an ALC meter indication at the right edge of the black ALC zone ALC Peak Hold Delay 4 15 1 002 I 16 Connect a microphon
44. Downloaded by Message from Amateur Radio Station VA3VFO RadioAmateur EU Greg White owner operator Re Yaesu Model 102 Series Amateur Radio Equipment Greetings from Toronto Canada I hope you will find the attached Yaesu manual helpful I have been assisted many times by Hams whom have kindly made manuals available for free via mail and the Internet I would like to take this opportunity to now make a contribution of my own I have noted the famous Yaesu Model 102 Series of radio equipment manuals absent from the Internet I am a happy owner of a complete Yaesu 102 station and in possession of its manuals Hearing of many requests for the manuals I have scanned my collection and present it to you here free of charge I do so with the hope that it will assist you in keeping your own Yaesu 102 equipment running forever and as correctly intended by the factory I also realize how frustrating it can be trying to remember the forgotten instructions of a destroyed or misplaced manual I request that these files remain free for private distribution and personal use by fellow licensed Amateur Radio Operators only and that they are to be considered as if on loan No fees are to be charged for or as a result of their use nor are they to be published publicly They are provided for private personal reference only and if shared with other Hams I ask that the credit for the scanning and free loan remain with me I look forward to your c
45. E IN pF SOWV RESISTOR VALUES ARE IN Q AND INDUCTOR VALUES ARE HENRIES UNLESS OTHERWISE This Manual Provided Courtesy of Greg VASVFO va3vfo rac ca 2 DIODES ARE 151555 UNLESS OTHERWISE NOTED MONI 5 558 TX 129 AGC ORIVE CW N lev 1ST LO OUT BK 4 B SEES ee Pe ETC MES m 92 705 415 007 008 040 25 5358 25 2407 al Sk Ig 4 85787 T JUS 04 18 pe 8 2 5 C56 C57 2 85 8 470P 240 29 c 104 150 045 PL gt 5 my ON Hd 105 150 18 5910 9 to um gt cis 1 wo 9959 2 gig P LU 3 5 4 24 dis 7 NAG 9 30200090 10 14 18 DIO C77 c76 122 21 330P 330P 27 00 2 0 24 5 5 N 8 28 0 5 014 28 5 25 535 29 R3I 29 0 015 25 5358 C79 R32 29 5 ISP 100K c50 0 01 RBI 27K 27 H R83 470 n POGUBO 020 MCI4518 8I Eke H
46. Hz BW 8 crystal filter XF 8 2HSN depending upon which is installed All signals from and AM signals from XF 002 if installed are delivered to second IF amplifier 3SK73GR when the NAR button is off or the optional second filters are not installed otherwise CW and SSB narrow signals from the second filters are applied to after narrow filtering After amplification the filtered 8 2 kHz IF signal is applied to second mixer Q5oo4 GSK73GR where it is heterodyned with the 8 67 MHz second LO signal from the Local Unit producing the 455 kHz second IF SSB and CW signals are then filtered by third filter 61 2 9 kHz BW 3 pole ceramic CMF455J1 unless optional CW narrow third crystal filters are in stalled at 005 either 500 Hz BW 8 pole filter XF 455C or 270 Hz BW 8 pole filter XF 455CN and the NAR button is pressed AM signals bypass these filters and are fed as are the SSB or CW signals from the third filter bank through the Q multiplier composed of 29 and 7 28 1815 and notch filter 25 1815 to 455 kHz IF amplifier Q5o1o 3SK73GR A portion_of the amplified signal is then buffered by Q201 and fed to the narrowband IF OUT 1 jack AM detectors D203 and D2080 1N60 and AGC detectors D2039 and D oao 1N270 The remainder of the amplified signal from Qso10 is delivered to the product detector on the AF Unit The detected AM sig
47. R II advances further reduce the DRIVE control setting slightly to maintain signal purity Notice that if the COMP control is set too high the signal to noise ratio of the transmitted signal will be reduced If the ALC level is set higher than one division in the black zone IMD products may increase CW OPERATION After completing the tune up procedure insert the two conductor plug from your key or electronic keyer into the KEY jack on the rear panel Key up voltage is plus 4 volts and key down current is 0 4 mA The operator may select any power out put desired up to the maximum rating of the transmitter by adjusting the DRIVE control but not beyond the point where the ALC indication on METER exceeds one division Also the DRIVE control should not be advanced clockwise beyond the point where the IC indication on METER I reaches 350 mA or 200 mA above 28 MHz For CW operation without an external amplifier when a small amount of additional power is neces sary you may switch the METER SELECT switch to PO advance the DRIVE control fully clockwise and adjust the PLATE and LOADING controls for This Provided Courtesy of Greg VASVFO va3vfo rac ca a peak PO indication METER I However if you operate CW with the ALC indication on METER II peaking higher than about the first division at the left side of the black ALC zone some distor tion of the keying waveform may result The VOX circuit may
48. RadioAmateur EU 2nd LO IN 3 c37 100 18 Di 8 R49 r Ha AM FM YX IN 39k CW TX IN 1 GND 22K JIG P23 0047 R46 L S R45 560 004 150 C38 0047 R44 33k DO 15597 2 3 RX IF IN HO JO 8 RX 24v 12 TX lV 04 150 22K RIS 1 5K s d 5 8 Sja SSB CW 12 oF 813812 gf AM FM I2V 210 5 558 SS8 w 78 NB 12 082 nnd gt 2 930 076 020 019 2SKI9GR 25 8 5 R23 SEM 280583 5 25 1583 00 m A o ALC PK H 22y 2SKI9BL TX OUT GND MONI OUT 9 GND 2 8 ALC RI74 00 x 2197 100 as 222 3 a Eo oT N z 20 N 034 033 2SA564AR 2 61815 C105 0 01 5 m IF UNIT 5 e 2 5 035 2343 No 2 25 564 205 _ ee 2 Pit
49. T PB 2347 The signal from tone amplifier Qsoo4 on the AF Unit is also delivered to limiter amplifier uPC577H on the AM FM Unit where the audio signal amplitude is amplified and limited to a preset level preventing over deviation This signal is then applied to varactor diode pair MV104 to phase modulate 8 2 MHz VCO volt age controlled oscillator 2SKI9BL serving as part of a PLL phase locked loop One portion of the VCO output is buffered by 2SK19TMGR and then divided by 256 at 5082 for application to phase detector TC5081P Carrier oscillator on the Unit delivers its signal after buffering by Q3029 to buffer 2 2SKI9TMGR which signal is then divided by 256 at 5082 applied to phase detector along with the signal from 5 Q6013 then presents a DC out put voltage proportional to the phase difference between the divided carrier signal and the divided VCO signal which is passed through active filter 5 28C1815GR back to modulator varactor D6003 thus locking the VCO frequency to that of the carrier oscillator The remainder of the frequency modulated signal from VCO is buffered by Qeoo7 25 380 TMY and delivered through IF amplifier on the IF Unit to second transmit mixer on the RF Unit A sample of the buffered VCO output from is also
50. VCXO while the Width function synchronously tunes the second LO and third LO commonly derived from 10 54 MHz VCXO 04036 This Manual Provided Courtesy of Greg VASVFO va3vfo rac ca Sample data to the Counter Unit for frequency display is derived from both the VFO signal and 10 MHz reference oscillator 0 026 Reference divider provides a 2 MHz square pulse for this purpose which is filtered at T4013 to provide 6 MHz signal to counter sample mixer 3SK73GR which also receives the VFO signal after lowpass filtering The resulting 0 5 to 1 0 MHz mixer product is passed through another lowpass filter before delivery from pin 1 of 7561 to the Counter Unit A clock signal for the Counter Unit is also derived from 10 MHz reference oscillator after division by 10 at further division by 40 at Q4o2o both mentioned in the PLL description buffering by 28C945Q and lowpass filtering This 25 kHz signal is brought out for the Counter Unit at pin 3 while a portion of the signal before filtering is delivered from 24614 to the receiver input at the EXT ANT jack on the rear panel providing a MARK signal for the receiver when the MARK button is depressed Second reference divider also provides 100 kHz signal delivered from 74015 to the EXT VFO jack and the ACC 1 receptacle on the rear panel VFO UNIT PB 2348 Variable frequency oscillator module
51. Zener Diode uPC7812H 2 2SK19Y 2 52 FCD uPC2002V 1 2SK125Y 7 Varactor Diode FIP9E8 1 78L05 1 3SK73GR 8 FC53M 4 1 Varactor Diode ICs Transistors Diodes FC63 1 AN6551 1 2SA496Y 1 1160 16 Varactor Diode MC3359 1 2SA546AR 4 Ge Diode GD4 203SRD 2 MC4044 1 2546390 1 1N270 4 LED MC14011B 2 2SA733Q 6 Ge Diode 23 2 14022 1 2SB705R 1 181554 1 Zener Diode MC14081B 2 25 380 8 Si Diode HZ5C2 2 14518 3 2SC496Y 1 181555 175 Zener Diode ND487C2 3R 1 25 535 5 51 76 1 1 Ring Module 2SC732GR 2 152236 1 Zener Diode SN74LS90 1 2SC732TM GR 2 Varactor Diode HZ9CI 1 SN74LS192 1 2SC945Q 23 15553 72 Zener Diode SN76514N 2 25 1589 1 Si Diode MV104 1 E TA7060AP 1 25 1815 1 15597 30 Diode 7069 1 28CI8I5GR 11 Schottky S4V10 1 5066 3 28C1815Y 27 Barrier Si Bridge 5070 1 25 1971 1 18 50 2 5 1 12 1 18 5081 1 28C2229 1 Varactor Diode Si Diode 3 5082 2 25 2407 2 1001 3 06 1 1 1 Si Diode Si Diode 10D10 12 WZ110 1 Si Diode Zener Diode i i i This Manual Provided Courtesy of Greg VA3VFO va3vfo racca 4 FRONT PANEL CONTROLS AND SWITCHES 228 W AMP WAR 1 This is the main ON OFF switch for the transceiver 2 HEATER With this switch ON heater voltage is applied to the dr
52. a 50 ohm dummy load A TRIP This control sets the anti trip threshold level at which speaker output ceases to activate the transmitter through the microphone during VOX operation KEY A manual key or output from an automatic keyer may be connected to this two conduc tor jack for CW operation Key up voltage is 4V and key down current is 0 4mA This Manual Provided Courtesy of Greg VA3VFO va3vfo rac ca D E 12 F G EXT SP This two conductor jack offers audio output for an external speaker such as the SP 102 or the SP 102P The internal speaker is disabled when a plug is inserted into this jack A TRIP IN When an external receiver is used with the FT 102 and the VOX system is used for transmitting audio output from the external receiver may be connected to this jack for the anti trip circuit in the FT 102 MARK This switch activates the frequency marker generator in the receiver 12V This jack provides low current 12V DC output for auxiliary equipment such as the FC 102 antenna tuner Maximum available current is 300 milliamperes BOTTOM COVER CONTROLS i Ww 1 2 3 4 These potentiometers are accessible through holes in the bottom cover Lay the transceiver on its side and use the plastic tuning tool provided to make these adjustments 1 2 TX AUDIO VR3001 These controls are used for shaping the audio spectrum of the transmi
53. at the left side of the scale 26 METER I The function of this meter during transmission is determined by the position of the METER SELECT 13 rotary switch During FM recep tion this meter functions as a discriminator indi cator for tuning purposes using the second from innermost DISC scale whereby received signals are tuned so that the meter indicates in the center of the scale During reception of other modes this meter is not used Monaural type Stereo type This Manual Provided Courtesy of Greg VA3VFO va3vfo rac ca REAR PANEL CONNECTORS AND CONTROLS FAN BRUSHLESS 2 9 1 GND For best performance and safety use this stud to connect the transceiver to a good earth ground through a large braided cable not more than 10 feet long Ground all other station equipment and accessories to this point 2 ANT coaxial jack This standard SO 239 type jack is for connection to the coaxial feedline to the antenna linear amplifier or antenna coupler Never transmit without having a load with 50 ohms impedance at the operating frequency connected to this jack 3 RX ANT jacks and switch EXT RCVR This jack may be used to connect an external re ceiver to the main antenna connected to the ANT 2 coaxial jack for operation at the same time as the FT 102 receiver such as for spotting during contest operation This jack connects through the T R relay so that is autom
54. atically disconnected from the antenna whenever the FT 102 is trans mitting However special care must be exercised to ensure that no AC DC or RF energy from a transmitter is ever applied to this jack as the lamp fuse in the receiver input will blow 10 ce W ANT RCA type jack This jack is for connection of a separate antenna for receive only such as during 1 8 MHz operation using a loop antenna for receiving Again special care must be exercised not to allow any power to be applied to this jack SEP NORM slide switch This switch enables the operator to select one of the following receiver antenna arrangements SEP Receive via external receiver only using main station antenna connected to coaxial ANT jack Transmit also on main antenna In this switch position the FT 102 receiver may be operated from another antenna connected to the ANT RCA jack but can not use the main antenna TX ANT SEP EXT RCVR ANT NORM RX NORM With the slide switch in this position the external receiver jack has no connection in the FT 102 However the FT 102 receiver is connected to both the main antenna coaxial ANT jack through the T R relay and to the ANT RCA jack Therefore no connec tions should be made to the ANT RCA jack if the operator intends to transceiver normally on the main antenna Any connection to the ANT RCA jack will be connected in parallel with the main antenna during receive and will
55. cept FM RF AMP OFF RF AMP ON SSB no optional filters 0 25 1 0 CW no optional filters 0 18 0 7 AM no optional filters 1 0 4 0 FM for 20 dB quieting 0 4 3 0 CW with APF on 0 05 0 2 SSB with XF 8 2HSN filter installed 0 2 0 8 CW with XF 8 2HC filter installed 0 12 0 5 Dynamic range with Width Control set for maximum IF width RF AMP OFF 95 dB minimum 100 dB minimum 102 dB minimum With no optional filters With XF 8 2HC installed With XF 8 2HCN installed RF AMP ON 90 dB minimum 95 dB minimum 97 dB minimum Optional AM FM Unit required for AM transmission and FM operation Specifications subject to change without notice or obligation ACCESSORIES supplied as standard AC POWER cord 2 wire 2 prong plug 3 wire 3 prong UL plug 3 wire 3 prong Australian plug 3 wire 2 prong EU plug FUSE 6A 100 117V AC 200 234V PHONO PLUG STP 58 KEY PLUG SH3001 SPEAKER PLUG P2240 ACC I PLUG E6 701B 02 ACC II PLUG E5 702B 02 EXTENDER FOOT PAD PLASTIC TUNING TOOL Downloaded by RadioAmateur EU T9013280 T9013282 T9013283 T9013284 Q0000012 Q0000004 P0090018 P0090007 P0090034 P0090032 P0090031 R3054620 R3054630 R3081530 N N e eS TUBES AND SEMICONDUCTORS Vacuum Tubes 78112 1 AWO01 24 12 7 1 uPC78L15 1 2SK19BL 2 Zener Diode 6146B 3 577 1 2SK19GR 3 7090 2 7808 1 2SKI9TM GR 3
56. cessor 20 0 5 When the BAND selector is set to 28 or 29 MHz positions pressing this button will shift the operat ing frequency up 500 kHz so that the operating frequency range will then be 28 5 29 0 MHz or 29 5 29 7 MHz respectively 21 BAND This selector is used to set the operating frequency band 22 PLATE This control tunes the capacitor in the final ampli fier tank circuit Resonant ranges for each band are marked on the scale with the 1 8 MHz band range covering the whole scale and the 3 5 MHz range also overlapping The setting of this control is dependent upon the impedance of the load antenna system so settings may vary slightly for impedances other than 50 ohms 23 LOADING This control matches the impedance of the final amplifier tank circuit with that of the load con nected to the antenna jack 24 DISPLAY The fluorescent display includes an indication of the operating mode as well as digital display of the operating frequency to the nearest 100 Hz CW N indicates narrow CW CW W indicates wide CW and AM N shows for all AM operation This Manual Provided Courtesy of Greg VA3VFO va3vfo rac ca 25 METER This meter indicates the received signal strength in S units and decibels above S 9 on the upper scale during receive operation and ALC level peak or average on the lower scale during transmis sion The correct ALC operating range is indicated by the black zone
57. ckly and you will see that only slight movement of the control is required Immediately press the MOX switch or release the PTT switch to return the transceiver to receive Correctly tuning the transmitter for the desired power output may take some time and practice at first but once the operator becomes familiar with the equipment the entire procedure will take only a few seconds Take your time but keep the transmissions short to preserve the lives of the final tubes 6 Key the transmitter and tune the PLATE con trol slightly for an IC dip and return to receive It is normal for the final tuned position of this control to be slightly dif ferent from the band marking but if a dip is not easily obtained within the range of the control the antenna and feedline should be checked for high SWR at the operating fre quency as the correct impedance is not being presented to the ANT jack 7 While observing the ALC indication on METER II key the transmitter and advance the DRIVE control so that the needle of METER II indicates straight up and return to receive 8 Advance the LOADING control to position 1 Now key the transmitter and again tune the PLATE control slightly for an IC dip on METER I Return to receive 24 9 Repeat step 8 until the IC dip is at exactly 300 mA 350 mA on the 1 8 MHz band each time advancing the LOADING control slightly higher until its setting is approxi mately matches t
58. cond alignment section covers the sometimes critical and tedius adjustments which must not be performed without the proper test equipment conforming to the specifications called for in the test equipment list If you do not have or are not familiar with this test equipment or have any doubts about its use in these specific applications you should not attempt any of the alignment procedures in this section Unless you are ex perienced with alignment of these types of circuits and thoroughly understand their operation let the alignments covered in the second section be performed by your authorized Yaesu dealer s service department Every FT 102 has been completely aligned at the factory prior to shipment However your particular operating environment may call for some re adjustments such as VOX Anti trip Monitor Volume or Sidetone Pitch Yaesu s design engi neers have made a special effort to make these controls and all of the adjustments that might require readjustment due to shipping and environ mental variations readily accessible to the user through the plastic circuit board cover under the cabinet s top cover Under normal use no other alignment should be necessary Service or realign ment of a major component may require sub stantial adjustment under circumstances though should realignment be attempted unless the operation of the transceiver is fully under stood the malfunction has been carefully analy
59. d 5020 28C1583 as well as 2SC380TMY before being applied to noise detectors and D os4 1N60 portion of the output from is also rectified by Doss and 1N60 and amplified at 22 25 1815 for feedback to 019 and as noise blanker AGC The time constant of this AGC is adjusted by the NB LEVEL control on the front panel This Manual Provided Courtesy of Greg VA3VF O va3vfo rac ca 30 killi sss Output from the noise detector is buffered by gate control Q is 2SC1815GR before being applied to the noise gate D299 D2003 mentioned earlier and located between the first IF amplifier and the first bank of crystal filters FM RECEIVE OPTIONAL AM FM UNIT PB 2347 A portion of the buffered IF signal from after 20 kHz BW filter XF oo1 is delivered through another 20 kHz BW filter on the AM FM Unit to the mixer section of MC3359 which also contains limiter amplifier discriminator noise amplifier and AFC sections In the mixer section the filtered receiver IF is mixed with the 8 67 MHz second LO signal deliv ered from the Local Unit resulting in a 455 kHz second IF This signal is passed through filter and fed to the IF limiter amplifier section of where amplitude variations are removed from the signal The signal is then applied to the discriminator section of re
60. do not place the FT 102 on top of another heat generating device such as linear amplifier Avoid heat ducts and window locations that might expose the transceiver to direct sunlight Ground the transceiver using a heavy braided cable of the shortest length possible Cold water pipes are generally not satisfactory as grounding points it is better to use earth rods with the grounding cable securely connected to each point in the ground system ANTENNA CONSIDERATIONS The FT 102 is designed for use with an antenna system presenting a 50 75 ohm resistive load at the antenna jack While the transmitter output circuitry is designed for uniform response within this impedance range significant departures from the 50 75 ohm specification will result in serious ly degraded transceiver performance and may result in damage to the final amplifier tubes If an open wire feedline is used or if the input impedance of the antenna system presents a higher or lower impedance than specified some sort of antenna tuner must be used to provide the proper impedance for the transceiver See your Yaesu dealer for details of the FC 102 antenna coupler This Manual Provided Courtesy of Greg VA3VFO E va3vfo rac ca T M OK ssQ n Downloaded by RadioAmateur EU MICROPHONE INFORMATION The eight pin microphone jack includes provision for external scanning when the FV 102DM external VFO is used with the transceiver a
61. e VOX GAIN or A TRIP controls more than necessary To adjust the audio characteristic of the trans mitter to your voice insert the plug from your headphones into the PHONES jack and set the transceiver on its side Now push the MONI button and adjust VR300 and through the bottom cover while speaking normally into the microphone and listening in the headphones 25 1 controls high frequency attenuation while 2 controls low frequency attenuation If the level has already been set some readjustment of the MIC GAIN control may be necessary to obtain the correct ALC level SPEECH PROCESSOR ADJUSTMENT Connect headphones if available to the PHONES jack and push the MONI button ON Set the METER SELECT switch to the COMP position and push the PROC button to activate the speech processor Keep the MIC GAIN control at the same setting as obtained above in the SSB Operation procedure and set the COMP control to the 12 o clock position Observe the ALC indication on METER II while speaking the word four into the microphone adjusting the DRIVE control to obtain a peak ALC indication within the first leftmost division of the black zone on the ALC scale do not adjust MIC GAIN Now listen to your signal in the transmitter IF while adjusting the COMP control for the amount of processing desired The COMP indication on METER I should not exceed 5 or 10 dB If the ALC indication on METE
62. e beat note approximate ly 700 Hz is obtained Zero beat the two tone so that the two receivers are precisely tuned to the same frequency 26 5 Set the MONI switch to ON to activate the CW sidetone Set the DRIVE control fully counterclockwise and set the VOX control to the MOX position 6 Key the transmitter and adjust the gain controls on the external receiver so that it is not overloaded Noting the beat note of the transmitted signal from the FT 102 adjust so that the sidetone pitch is exactly the same as that produced by the transmitter The sidetone now becomes reference spotting signal during CW operation Operation 1 Let us say that DXIDX is operating on 14 002 MHz working stations around his frequency Locate the station working DXIDX and close your key while in the receive mode Tune the transceiver to align the sidetone note with that of the station working DXIDX you will now be zero beat with that station 2 Push the RX button ON and tune the CLAR control to DXIDX s frequency When you call DXIDX you will be precisely on the same frequency as the previous station giving you a better chance of working DXIDX AM OPERATION 1 Anoptional 6 kHz AM filter the XF 8 2GA is available from your Yaesu dealer If this filter is not installed the received bandwidth on AM will be 2 9 kHz For transmitting AM the Optional AM FM unit must be installed 2 After preliminary tune u
63. e cabinet for any signs of damage If any damage has been sustained immediately contact the shipping company and document the damage completely Save the pack ing carton and foam packing material for possible use at a later date 234 VAC 220 VAC 200 VAC 117 VAC POWER CONNECTION The FT 102 is designed for use in many areas of the world using supply voltages that may differ from your local supply voltage For this reason be absolutely certain that the voltage specification marked on the rear of the transceiver agrees with the local AC supply voltage THIS INSPECTION MUST BE MADE BEFORE CONNECTING THE AC POWER CORD TO THE REAR APRON OF THE TRANSCEIVER If the transceiver is wired for another supply voltage change the connections to the primary of the power transformer as shown below Also change the label on the rear panel CAUTION PERMANENT DAMAGE WILL RESULT IF IM PROPER AC SUPPLY VOLTAGE IS APPLIED TO THE TRANSCEIVER OUR WARRANTY DOES NOT COVER DAMAGE CAUSED BY APPLICATION OF IMPROPER SUPPLY VOLT AGE DO NOT CONNECT THE AC POWER CORD TO A DC POWER SOURCE 110 VAC 100 VAC POWER TRANSFORMER PRIMARY CONNECTIONS Manual Provided Courtesy of Greg VA3VFO va3vfo rac ca n TRANSCEIVER LOCATION AND GROUND In any station installation an important considera tion is adequate air circulation around the final amplifier compartment Do not place books or papers on or around the cabinet and
64. e to the MIC jack and depress the ALC METER button to activate the peak hold circuit Speak into the micro phone and adjust VR oos for the desired hold time on the ALC meter METER II VR3003 TC3oo1 AF UNIT ALIGNMENT PB 2344 CW Carrier Frequency 1 Connect the frequency counter to pin 1 of J3oo4 and connect the dummy load to the ANT jack Set the MODE selector to CW 2 Key the transmitter and adjust TC3993 for 8 2166 MHz on the counter TX Carrier Balance 1 Set the FT 102 and a separate monitor receiver to 14 250 MHz Remove the micro phone from the MIC jack and set the MODE selector to USB 2 Key the transmitter and adjust and alternately while switching from USB to LSB to obtain the minimum carrier output in both modes as indicated on the external receiver RX Carrier Balance 1 Remove all connections from the ANT jack With the FT 102 set to 14 250 MHz adjust VR3oo4 for minimum S meter deflection S A 14 1 2031269 5 e 215 demam 6001 Jeooz VRsoo Teoos m 9 4 47 m CW Transmit Frequency 1 Set the FT 102 to the CW mode do not use the TUNE position for this adjustment and connect the frequency counter to RF OUT jack 1 on the rear panel 2 Tune the transmitter for slight
65. en two close AM stations during AM operation or a second CW signal during CW operation press the NOTCH button and gradually tune the NOTCH control to remove the heterodyne Tune slowly as the setting of this control is critical This Manual Provided Courtesy of Greg VASVFO va3vf rac ca 9 During CW operation under crowded or weak signal conditions the APF filter can be acti vated filtering out all but a very small slice of audio frequencies Use this feature after tuning the SHIFT WIDTH for optimum setting when the remaining passband is still crowded or the noise level is still disagreeable Press the APF button and carefully tune the APF control for peaking by ear or audio scope of the desired signal Note that practically all noise and QRM has vanished however it is important to bear in mind that signals blocked by the APF are still producing AGC action so the S meter may not be used for peaking Switch the APF OFF when tuning to a new frequency of adjusting the SHIFT WIDTH The APF feature can be used at the same time as the NOTCH filter but only during CW operation APF RESPONSE dB ATTENUATION 3 w 4 0 1 0 2 030405 2 3 kHz FREQUENCY 10 A variety of optional IF filters allow the 21 operator to choose from several possible filter configurations for both CW and SSB narrow bandwidths as shown in the chart When
66. er before being applied to the RF Unit When is the SEP position the signal from 60 connects through Sg to EXT RCVR jack J RF UNIT PB 2342 The incoming signal from pin 2 of 7004 is fed through RF amplifier on off relay to the preselector tank circuit selected by the band switch and then through relay to the gate of RF amplifier 2SK125Y AGC is applied to the gate of the other RF amplifier Qioo1 2SK125Y as the signal is passed from Qioo through 001 and then through RF amplifier relay RL oos and relay to the bandpass filter selected also by the bandswitch When the RF amplifier is switched off the signal is passed directly from to From the bandpass filter the signal is fed through T R relay and transformer to the active bal anced mixer and 25 125 where the incoming signal is mixed with the first LO signal from the Local Unit The resulting 8 2 MHz product is passed through transformer 20 kHz monolithic crystal filter and transformer T1929 to deliver the IF signal filtered of IMD causing products to the IF Unit A sample of the wideband IF signal at is buffered by 2SCI815Y for external moni toring via the IF OUT 2 jack A sample of the slightly filtered IF signal at 20 is buffered by 2SK125Y for delivery to
67. eter VR4oos for 10 5466 MHz on the counter Now connect the frequency counter to TPsoos key the transmitter and adjust potentiometer VRa4oo for 19 2166 MHz on the counter Set the MODE selector to LSB and check TPaoo7 for 10 5434 MHz and 4006 for 19 2134 MHz with the counter during trans mission Connect the Audio signal generator to pin 8 of the MIC jack pin 7 is ground and Con nect the Oscilloscope to the 5 on AF unit Set the AG for 1 kHz 2 mV MIC 2 gain to 9 o clock and HEATER off Key the transmitter and note the amplitude of the scope display Now change the AG frequency to 300 Hz 2 mV and adjust 002 for the same amplitude on the scope Retune the AG to 1 kHz and switch the HEATER on 14 MHz band Tune up the transmitter for 100 watts output adjusting the signal generator output level to obtain this power output with the MIC GAIN control at the 12 o clock position Now adjust the audio generator frequency to 300 Hz while maintaining a constant genera tor output level If the ALC indication on METER II does not change during this audio frequency change check the output power level which should now be 25 watts If neces sary adjust VR4oos for 25 watts output If the ALC indication changes repeat step 5 with the MIC GAIN control set lower and the signal generator level correspondingly higher Return to receive switch the MODE selector to USB and repeat step 6 adjusting
68. gnals will pass while to the right of center the lower sideband signals will pass If QRM is still present the size of the exposed gray area may be further reduced but the passband will become too narrow to permit readability if the exposed gray area is made too small It will be noticed that the width of the passband may be narrowed much more for CW than for SSB to still maintain readability With practice the op erator will quickly find that the SHIFT WIDTH system can be used for reducing or eliminating most types of QRM including heterodynes near the edge of the passband that may be outside of the range of the NOTCH filter Also when band noise is high the bandwidth can be adjusted so as to eliminate a large portion of the noise while still passing the signal During AM operation the width feature is disabled but the shift feature will still prove useful for eliminating interference 22 USB CW dem Carrier USB i Carrier USB i Carrier USB Carrier LSB TRANSMITTER OPERATION The following tuning procedure must be performed prior to commencing transmission on the desired band and mode Please study this entire procedure carefully before operating the transmitter as incorrect setting of some controls may damage the transceiver Do not exceed 30 seconds of key down time during tuning and if it is necessary to do so for close to 30 seconds
69. hat shown in the Loading Position Table Again if there is a problem acheiving the dip with the PLATE control or if the dip is far above or below 300 mA the antenna and feedline should be checked When the above procedure is performed correctly the IC indication on METER I will be 300 mA when the PLATE control is tuned for a dip and the ALC indication on METER II will be approxi mately straight up The transmitter is now tuned for optimum signal purity and moderate loading of the final amplifier tubes providing an output power of about 100 watts This tune up procedure is recommended whenever SSB operation or any mode of operation with a linear amplifier is con templated LOADING POSITIONS FREQUENCY 1 8MHz 1 9MHz 2 0MHz 3 5MHz 7 0 2 7 5MHz 10 0MHz 10 5MHz 14 0MHz 14 5MHz 18 0MHz 18 5MHz 21 0MHz 21 5MHz 24 5MHz 25 0MHz 28 0MHz 28 5MHz 29 0MHz 29 5MHz pis 3 5 10 14 21 NOTE LOADING positions are nominal Minor 1 variations from positions shown are to be 1 expected This Manual Provided Courtesy of Greg VASVFO va3vfo rac ca Note Although it is possible to tune the final stage of the transmitter for higher output power by adjusting the DRIVE PLATE and LOADING controls for peak power output this is generally not recommend ed because the purity of the output signal particularly IMD will degenerate below specified values
70. is buffered by 5 25 9450 and applied to PLL local first premixer Q49534 SN76514 which also receives a 5 0 to 5 5 MHz signal delivered from the VFO Unit or EXT VFO jack through a low pass filter The 13 715 to 14 215 MHz output from premixer Q4o24 is then filtered through a bandpass filter composed of through T4003 before being delivered to the PLL mixer for those bands below 14 MHz For operating on bands above and including the 14 MHz band the 13 715 to 14 25 MHz filtered signal is applied to PLL local second premixer 4 25 3SK73GR which also receives a 10 MHz signal filtered through bandpass filter for operating frequencies between 14 and 21 MHz or a 20 MHz signal from times 2 multiplier Q4029 25 9450 for operating frequencies on or above Ist Lo OUT Lo OUT T 4001 04012 5 76514 MIX 10 5434 MHz 04019 741590 Om gt IOOkHz MARK 25kHz OUT VFO IN COUNTER OUT OUT FT IQ2 This Manual Provided BLOCK DIAGRAM Courtesy of Greg VA3VF O va3vfe rac ca OJA UA 6245 SdIHSNOILV13Y 3 00384 201 13 P P Ao4Ad pnupWi siy L 5 ZHWOO
71. is provides both stable local and BFO signals kept exceptionally clean by using six VCOs while the all new VFO design incorporates a special IC allowing remarkable stability and simplicity of construction The unique 24 VDC receiver front end employs four JFETs for the high 1456 RF amplifier and mixer and the RF amplifier may be switched out of the circuit for those situations that call for extraordinarily wide dynamic range IFs of 2 MHz and 455 kHz assure freedom from images while providing maximum potential for tailoring of the IF passband A completely new circuit design is used to provide IF shift width variations with just one control while independently adjust able IF notch and audio peak filters are also included The exceptional noise blanker circuit 1 has its blanking pulse width adjustable from the front panel vastly improving its effectiveness over other designs Optional crystal filters are available for ten possible parallel or cascaded configurations to provide both narrow CW and SSB bandwidths from 270 Hz to 2 7 kHz and 6 kHz for AM The audio stages of the transmitter include low cut and high cut filters for precise tailoring of the audio before it is applied to the modulator An extra product detector enables monitoring of the transmitter IF providing for accurate setting of the RF speech processor and audio filters so that the operator can optimize the signal for his person al voice characteristics Dual f
72. itches by commands from the BAND selector The 8 67 MHz second LO signal is derived from the 19 215 MHz VCXO and the signal from another 10 54 MHz VCXO actual center frequency 10 5466 MHz for USB or 10 5434 MHz for LSB and 10 545 MHz for AM with continuous fre quency adjustment by the Width system The out put of this 10 54 MHz VCXO 28C945Q is buffered by Q4037 2SC945Q and applied to second LO mixer 3SK73GR which also receives a signal from 19 215 MHz VCXO after buffering by 2SC945A The 8 67 MHz output from mixer is then buffered by 4 28C945Q and passed through a bandpass filter for delivery to the IF Unit from 74008 and to the AM FM Unit from Jgoo9 The 455 kHz third LO signal is derived from 10 MHz reference oscillator and 10 54 MHz VCXO 10 MHz signal after buffering by and division by 10 at mentioned in the PLL description has its 1 MHz square pulse signal filtered through a bandpass filter composed of T4012 and T4016 to provide an 11 MHz signal for third LO mixer 3SK73GR also receives a portion of the buffered 10 54 MHz signal from Q4o37 thus providing an output at 455 kHz buffered by Q4041 2SC945Q and passed through a lowpass filter for delivery from J491 to the AF Unit This unique frequency derivation scheme allows the Shift function to tune the second LO at 19 215 MHz
73. iver and final amplifier as well as the cooling fan For receiving only turn this switch OFF to conserve energy if desired 3 MIC Connect a 600 ohm impedance microphone to this 8 pin jack 4 PHONES Connect your headphones 4 16 ohms impedance to this standard phone jack If you use stereo headphones with a three conductor plug you will hear your signal in both ears as with monaural headphones and a two conductor plug Inserting the plug into this jack will disable the speaker 5 MODE This selector is used to determine the FT 102 s mode of operation LSB USB TUNE CW AM or FM The TUNE position is used for adjustment of the final amplifier via the LOADING and PLATE controls Transmission of AM and all operation of FM require the optional AM FM unit amp OD 9 OW 609000 d 23 2200049 6 5 RF AF This control adjusts the level of the audio gain of the receiver Rotate this control clockwise to increase the volume RF This control is the outer of these concentric knobs Turn this knob clockwise to increase the gain of the RF and IF amplifiers via the AGC voltage The fully clockwise position is the point of maximum gain and this control is normally set in this position When the RF gain control is turned counter clockwise from its maximum position the S meter reading during receive will be changed The minimum meter reading position will be moved up the scale although the
74. ly to ensure that this level is not exceeded This Manual Provided Courtesy of Greg VA3VFO va3vfo rac ca 21 2SCIBI5 Y VOX ALC KEY 25 1815 MIC AMP 9301 2SCIBISY ANT NB GATE 02006 7 2SCIBISY x2 02001 3 15597 2 03002 5 15597 4 LO L Beri T 93 JapczezH 12 Rx SV LO Ist LO 455 kHz 2SCIBiSY Sw DISPLAY 98505 04 Q2 aM REG 1 4 01001 2 2SKI25Yx2 FINAL UNIT RECEIVE TRANSMIT CONTROL UNIT 102 BLOCK DIAGRAM 1 Downloaded by RadioAniateur EU VASVFO This Manual Provided Courtesy of Greg va3vfo rac ca CIRCUIT DESCRIPTION The block diagram and following circuit descrip tion will provide a better understanding of the design and function of this transceiver Refer to the schematic diagrams for specific component details RECEIVER The RF input signal from the coaxial antenna jack is fed through relay RLo 9 on the Relay Unit PB 2354 and then passed through the NORM SEP switch 59 when in the NORM position to the external antenna jack lamp fuse and highpass filt
75. nal from D2038 is delivered to the AF Unit for filtering and ampli fication The detected AGC signal from D2039 is amplified by 2 12 25 1815 a portion of the output of which is fed back to IF amplifier and RF amplifier Qioo1 for gain control while another portion is further amplified by S meter amplifiers 1 QSKI9TMGR and Qz014 2SA564AR before delivery through T R relay to METER AF UNIT PB 2344 The SSB or CW 455 kHz IF signal is detected at D3021 3024 1160 which also receives the 455 kHz third LO from the Local Unit after buffering at 1 28C1815Y The CW audio product is then passed through an active CW filter 25 1815GR amplifier 2SC1815GR and APF filter AN6551 while the SSB audio product and detected AM are passed through active filter 2SC1815GR and amplifier 3023 28C1815GR after which each signal is applied to analog switch Q3019 MC14066B which selects the appropriate mode via the MODE selector for further amplification Finally the selected output is fed through muting switch 28C1815Y to audio power amplifier 03025 uPC2002V and from there to the speaker A portion of the output signal from Q3o19 15 diverted through amplifier for auxiliary output at the AF OUT jack on the rear panel NOISE BLANKER IF UNIT Buffered output from 20 kHz BW filter XF 1001 is amplified by 19 an
76. narrow filters are installed simply press the NAR button to select the appropriate narrow filter for the particular mode in use When in the CW mode the display will indicate CW N or CW W for narrow or wide bandwidth AM is always indicated by AM N This Manual Provided Courtesy of Greg VASVFO XF 2001 XF 8 2HS 2002 XF 8 2GA A Diode switches controlled by the MODE selector and NAR button for SSB or CW narrow wide selection 001 8 2M 20A FM XF 2004 XF 8 2HSN HC 2003 XF 8 2HC HCN SSB CW 455 XF 2005 455 Diode switches controlled by the NAR button for CW only AM RECEIVE IF FILTER SELECTIONS SHIFT WIDTH CONTROL OPERATION The variable bandwidth and IF shift feature allows the setting of optimum bandwidths and passband frequency selection during SSB and CW reception for minimized QRM and peaked signal to noise ratio under all conditons The two friction coupled controls are normally aligned so that the window in the skirt of the round inner knob is straight up while the paddle of the control is straight down causing the entire exposed area within the window to be the gray portion of the paddle control Note that neither knob adjusts shift or width alone but that the adjustment of either affects both shift and width The size of the gray area exposed through the
77. nd adjust trimmer if necessary to obtain a reading of 6 000 MHz on the counter CW Sidetone Pitch and Level See page 13 of this manual 10 5 MHz SSB Carrier Oscillator Transmit Audio Characteristic See page 13 of this manual 1 Set the SHIFT WIDTH controls to their center positions and connect the frequency SECTION II counter to 007 2 Set the MODE selector to LSB and adjust 2 for 10 5434 MHz on the counter ALIGNMENT EQUIPMENT REQUIRED The following precision test equipment is required for the alignment procedures in this section 3 Set the MODE selector to USB and adjust for 10 5466 MHz on the counter Frequency Counter Y C 500E YAESU or equivalent Signal Generator HP 8640B Hewlett Packard or equivalent DC Voltmeter 4 Preset potentiometer VR49o4 fully counter clockwise and connect the DC voltmeter across the outer terminals of Adjust on the main chassis to obtain 0 volts on HP 4304B the meter VTVM with RF probe HP 3406A 19 2 MHz Local Oscillator AF VTVM HP 400E 1 Connect the frequency counter to 4006 In line Wattmeter set the MODE selector to LSB and adjust Bird 43 VRaoos for 19 2134 MHz on the counter Dummy Load 200 W Bird 8343 200 This Manual Provided Courtesy of Greg va3vfo rac ca 41 2 Set the MODE selector to USB and adjust AM Carrier Frequency Check for 19
78. nect a 600 ohm impedance microphone if desired or for CW operation a manual key or external keyer may be connected to the KEY jack For detailed pin connections to the micro phone plug or keyjack refer to the diagrams on pages 9 and 18 Your Yaesu dealer can provide a suitable microphone for your re quirements 3 If desired headphones may be connected to the PHONES jack on the front panel The impedance of the headphones should be 4 16 ohms 4 Before inserting the AC plug from the trans ceiver into the wall outlet ensure that the transceiver power switch is off and be certain your FT 102 AC voltage requirements match your local line voltage FREQUENCY INDICATION Frequency readout on the FT 102 is by digital as well as analog displays The analog readout dial provides resolution to 1 kHz while the digital display provides resolution to 100 Hz To match the analog frequency indication to the digital display simply hold the VFO dial knob stationary with one hand while rotating the cali brating ring on the dial knob until the indications match The CLAR button must be OFF out when this adjustment is made This Manual Provided Courtesy of Greg VASVFO va3vfo rac ca RECEIVER OPERATION 1 Preset the controls and switches as follows POWER OFF HEATER OFF MODE USB above 10 MHz or LSB AE Counterclockwise RE 52S Fully clockwise MOX OFF out RFAMP
79. ng a footswitch the VOX GAIN control should be rotated fully counter clockwise to the PTT position This Manual Provided Courtesy of Greg va3vfo rac ca 39 Final Amplifier Bias Adjustment CAUTION 1 Set the MIC GAIN fully counterclockwise HIGH VOLTAGES ARE PRESENT and the MODE selector to USB or LSB Set ON THE UNDERSIDE OF THE the METER SELECT to IC Turn the HEAT CHASSIS AND INSIDE THE FINAL ER switch ON and let the final tubes warm up AMPLIFIER COMPARTMENT USE for a few minutes GREAT CARE WHILE MAKING ADJUSTMENTS IN AREAS OF EX POSED WIRING Note The final amplifier enclosure must be in place to provide the required RF shielding during the neutralization procedure PO Meter Adjustment 1 Tune the transmitter for maximum power output at 14 250 MHz into a dummy load 2 Set the METER SELECT switch to PO and RECT A UNIT adjust on the rear panel for 80 deflec 2 Observe the indication on the IC scale of tion or as desired METER I while depressing the MOX button to key the transmitter IC grid current should be 75 mA 3 If the IC reading is more than 10 from this figure adjust the RECT A Unit 2342 FINAL AMPLIFIER NEUTRALIZATION Important Note For this alignment use a NON METALLIC tuning wand 1 Set the BAND switch to 29 set the tuning dial to 29 MHz and tune into a dummy load for approximatel
80. o clock and maximum positions according to the microphone in use In the FM mode the RF speech processor and SHIFT WIDTH controls are disabled 4 The receiver SQL control may be used to silence the receiver during standby periods when no signals are being received While listening on an unoccupied frequency ad vance the SQL control until the background noise is just silenced Do not go beyond this threshold point too far or the receiver will not respond to weak signals SSTV OPERATION Slow scan television operation is easily accom plished using the FT 102 Proper adjustment involves techniques outlined previously for SSB and FM operation 1 Set the MODE switch to USB or LSB per the band in use Connect the audio output from your SSTV generator into the rear panel PATCH jack and connect the audio input for the SSTV decoder to the SP or AF OUT jack depending on the impedance requirement of your terminal 2 Receive operation is identical to that for SSB operation Use the receive clarifier as needed for minor receive frequency adjustments with out changing the transmitter frequency 3 To transmit leave the microphone gain control in the same position as for SSB opera tion Close the PTT switch and adjust the output level from your SSTV generator such that the ALC meter needle stays within the ALC range Now adjust the MIC GAIN control so that the IC meter reading is 150 mA or less Check the IC reading periodical
81. ontinued support of the excellent FT102 Transceiver and Accessories and helping to build both its continued demand as a collectable and its assured respect in Amateur Radio history 73 yours truly Greg White VA3VFO Toronto CANADA va3vfo rac ca This Manual Provided Courtesy of Greg va3vfo rac ca INSTRUCTION MANUAL FT 102 T Downloaded by RadioAmateur EU YAESU MUSEN CO LTD BOX 1500 This Manual Provided Courtesy of Greg VASVFO va3vfo rac ca CONTENTS Page GENERAL DESCRIPTION 1 SPECIFICATIONS made 2 TUBES AND SEMICONDUCTORS 4 FRONT PANEL CONTROLS AND SWITCHES 5 REAR PANEL CONNECTORS AND CONTROLS 10 BOTTOM COVER CON TROLS 13 INTERCONNECTIONS 14 INTERCONNECTION CABLE INFORMATION 15 INSTALLATION Preliminary Inspection 16 5 ix 16 Transceiver Location and Ground 17 Antenna Considerations 17 MICROPHONE INFORMATION 18 OPERATION Frequency Indication
82. p set the MODE switch to AM and the METER switch to IC Rotate the MIC GAIN and DRIVE controls fully counterclock wise 3 Close the microphone PTT switch and advance the DRIVE control until the IC meter reaches a reading of 100 mA 4 Advance the MIC GAIN control to the 12 o clock position Use the MONI func tion to set MIC GAIN precisely but do not advance the MIC GAIN control too far or This Manual Provided Courtesy of Greg VASVFO va3vfo rac ca spurious responses may result If the IC meter deflects downward during voice peaks the DRIVE level should be reduced until meter movement is just noticeable 5 In the AM mode the RF speech processor ALC meter and the variable IF bandwidth features are disabled though the IF shift feature will prove useful for reducing QRM FM OPERATION The FT 102 can operate in the FM mode if the optional AM FM unit is installed The FM mode is useful for operation on the 10 meter band through a repeater Also when you use transverter with the FT 102 you can enjoy FM operation on the VHF and UHF bands 1 Set the MODE switch to FM and the METER switch to IC Set the DRIVE control fully counterclockwise 2 Depress the microphone PTT switch and advance the DRIVE control until the reading on the IC meter reaches 200 mA During FM operation periodically check the IC meter to be sure the IC reading does not exceed 200 mA 3 Set the MIC GAIN control between the 12
83. p and then down equal amounts while observing the DISC meter indication for equal offset either side of center Remove the input signal The DISC meter should reset at the center position If not repeat the procedure TRANSCEIVER FM Modulator 1 Connect the test equipment as shown in the figure Set the MIC GAIN control to the 2 o clock position and set the audio generator output for 10 mV at 1 kHz Adjust VReoo4 for 5 kHz total deviation on the deviation meter Reduce the audio generator output level to 1 mV and check the deviation meter for 3 5 kHz total deviation FM VCO Connect the set for DC from the common cathode of varactor Dg 95 to ground see page 47 Key the transmitter and with no modulation adjust T6003 if necessary for 4 volts on the meter Transmit IF 1 Tune the transmitter up in the Mode at 29 000 MHz into the dummy load Set the DRIVE control for 150 mA IC and adjust for maximum power output Repeat step 1 in the FM mode with 200 mA IC adjusting for maximum output DIRECTIONAL COUPLER DEVIATION METER This Manual Provided Courtesy of Greg VASVFO va3vfo rac ca _ 48 5002 5 11 5002 Qs003 4 L 5001 Qsoos 5006 5006 Qs013 5 5001 M Qso12 5005 7 Qso10 2 Qsoa 5009
84. peak S level of a given signal will remain the same as long as it is greater than the minimum S meter position set by the control 7 Push Button Switches Push these buttons once for the ON function and push again for the OFF function out position MOX This switch allows you to use two hands for adjusting the LOADING and PLATE con trols when tuning the final amplifier MODE selector in TUNE position A This Manual Provided Courtesy of Greg VA3VFO RF AMP va3vfo rac ca MEN Push this switch in to switch the RF ampli fier ON for maximum sensitivity In the presence of strong signals or on noisy bands set this switch to the out OFF position for less noise and interference on the receiver C NAR Press this switch to activate the narrow SSB or CW filter options when installed according to the mode selected by the MODE selector The interaction of these controls is described in the Receiver Opera tion Section D PROC This switch turns the transmitter RF speech processor on when pressed in E NB Push this switch once to turn on the receiver noise blanker when encountering pulse type interference Otherwise this switch should be kept in the OFF out position for best receiver performance F MONI Press this switch to monitor the IF signal via the speaker or headphones during trans mission This enables the operator to monitor the audio signal quality and adjustment of the transmitter
85. power output into the dummy load and adjust if necessary to match the counter frequency with the display frequency 100 Hz max imum AM Carrier Frequency 1 Connect the frequency counter to pin 1 of Jsoos the AF Unit and set the MODE selector to AM 2 With the dummy load connected to the ANT jack key the transmitter and adjust 002 on the AF Unit for 8 215 MHz on the counter AM FM UNIT ALIGNMENT PB 2347 option FM IF 1 Set the SQL control fully counterclockwise and set the SHIFT WIDTH controls to their center positions Jeooa VRsooz Downloaded by RadioAmateur EU coo Q COMMON CATHODE ANODE ANODE This Manual Provided Courtesy of Greg VA3VFO va3vfo rac ca Tune the transceiver and SSG to 29 MHz Set the SSG output for 1 kHz modulation and 3 5 kHz deviation and connect to the ANT jack on the FT 102 Set the SSG output level for an indication of 5 9 on METER II Connect the AF millivoltmeter to the speaker terminals and adjust and Tegoos for maximum indication on this meter DISC Meter Set up the FT 102 and SSG as in step 2 of the preceding FM IF alignment procedure Set for center indication on the DISC meter scale of METER I Check the DISC meter alignment by tuning the VFO dial first u
86. pressed activates the peak hold circuit for use in adjusting the MIC GAIN and DRIVE controls during SSB transmission The ALC meter needle will rise to the ALC peak level and hold this indication for one second after which the needle will drop to zero if mic input is stopped When the ALC METER switch is in the NORMAL out position the ALC meter will follow the average ALC voltage D RX Depress this button to activate the clarifier function for the receive frequency The LED indicator beside this button will then light to indicate that the receiver clarifier func tion is on This Manual Provided Courtesy of Greg VA3VFO va3vfo rac ca E TX This button activates the clarifier function for the transmit frequency also indicated by the nearby LED Either or both of the RX and TX clarifier functions can be used at one time 12 CLAR CLAR When the clarifier function is activated for either receive transmit or both this control allows the clarified frequency to be shifted up to plus or minus 2 5 kHz or more from the VFO frequency The actual operating frequency VFO clarifier offset will be indicated by the display When the RX and or TX buttons are returned to the OFF out position the operating frequency will return to the original VFO frequency When the CLAR control is set to the 70 position straight up the clarifier frequency is the same as the VFO fre quency no offset
87. ptional AM FM Unit when FM transmission occurs as well as amplifying the output of monitor AM detector 28 380 which receives IF input from The output of amplifier is delivered to final audio amplifier 5 on the AF Unit for output to the speaker or headphones RF UNIT PB 2342 The modulated filtered 8 2 MHz IF is applied to balanced mixer module ND487C2 along with the first LO signal from the Local Unit re sulting in an output signal at the operating fre quency This signal is first amplified by 1007 25 2407 followed by Qioos 28C1589 and 1 28 1971 before application to driver tube Vioo 12BY7A A sample of the input to the driver is made available for transverter excitation at the RF OUT jack on the rear panel Output from is resonated by the preselector on the band selected by the BAND switch and then delivered to the Final Unit On the Final Unit PB 2355 the transmit signal is brought up to full power at Vog9 Vogo3 before delivery through the final tank circuit on the main chassis to the Relay Unit PB 2354 On the Relay Unit the signal is fed through T R relay Rlogo to the coaxial ANT jack with sample delivered through the PO ADJ potentio meter on the rear panel and the METER SELECT switch to METER I CW MODE The CW carrier is generated by crystal oscillator 26 2SKI9TMGR activated by analog s
88. ront panel metering and a new ALC peak hold system take the guess work out of tuning up as well as saving valuable time The final amplifier design incorporates three 6146B tubes with RF feedback to achieve an improvement in third order IMD suppression over two tube and solid state designs by approximately a factor of ten leaving the FT 102 virtually in a class by itself concerning spectral purity of emis sions This manual should be studied carefully in order to derive full performance and maximum enjoy ment from the FT 102 This Manual Provided Courtesy of Greg i s GENERAL Frequency coverage Band Range 1 8 1 8 2 0 MHz 3 5 3 5 4 0 MHz 7 7 0 7 5 MHz 10 10 0 10 5 MHz 14 14 0 14 5 MHz 18 18 0 18 5 MHz 21 21 0 21 5 MHz 24 5 24 5 25 0 MHz 28 29 28 0 29 9 MHz Operating Modes LSB USB A3J J3E CW A1 A1A AM A3 A3E and FM F3 F3E Power requirements 100 117 200 or 234 VAC 50 60 Hz Power consumption Receive 95 73 VA with heaters off Transmit 440 VA for 100 W output Dimensions WHD 368 x 129 x 309 mm Weight Approx 15 kg TRANSMITTER Power Input 1 8 25 MHz 28 29 9 MHz SSB CW 240 W DC 160 W DC AM 80 W DC 80 W DC SSTV FM 120 W DC 120 W DC Carrier suppression Better than 40 dB at 14 MHz Sideband suppression Better than 60 dB 14 MHz kHz tone Spurious radiation Better than 40 dB
89. s well as micro phone and PTT input The Yaesu models YM 34 35 36 37 and 38 can all be used with the FT 102 while the MD 1B8 desk top microphone and MH 1B8 hand microphone are especially recommended where use of the scanning feature is anticipated and the MH 1A8 hand microphone for similar performance without ecanning controls Viewed from A sit If you use a non Yaesu microphone be certain tQ write TONE SELECT 600 50k VIOL connect the microphone plug correctly The nominal microphone input impedance is 600 ohms BLUE BROWN ORANGE RED BLACK ITE SHIELDED MD 1B8 MICROPHONE CONNECTIONS MH I1B8 MH 1B8 MICROPHONE CONNECTIONS 18 Downloaded by RadioAmateur EU YM 34 YM 37 MICROPHONE CONNECTIONS YM 37 6000 0 YM 38 YM 38 MICROPHONE CONNECTIONS 19 OPERATION The tuning procedure for this transceiver is not complicated However some functions are unique to the FT 102 and are not contained in other transceivers Therefore to obtain maximum per formance set up your transceiver for operation according to the following procedures Before inserting the AC plug into the wall outlet the following procedure must be performed 1 Connect a proper antenna or a dummy load having an impedance of 50 ohms at the operating frequency to the coaxial ANT jack on the rear panel 2 the front panel microphone jack con
90. sulting in an audio output coinciding with frequency shift in the 455 kHz IF signal When no carrier is present in the 455 kHz IF the high frequency noise present at the discriminator output is amplified by the noise amplifier section of Qeoos and rectified by noise detectors 16004 and 1360 The resulting DC voltage is passed through the SOL control on the front panel and back to squelch switches and 2SC1815GR which turn off the audio output from when no carrier is present When a signal is received the audio output from is delivered to audio amplifier Q3925 on the AF Unit unless the MUTE line is grounded in which case 2SCI8ISGR grounds the output signal from Qeoos AFC output from is filtered and delivered through the METER SELECT switch to METER I for discriminator tuning indication TRANSMITTER SSB MODE AF UNIT PB 2344 The speech signal from the microphone jack is amplified by 2SC732TMGR and Qsoo 2SC1815Y whence a portion of the speech signal is diverted for VOX operation The remaining signal from 2 is further amplified by 2SC1815BL and passed through adjustable TX tone filters to tone amplifier 2SC732 TMGR A portion of the output from is diverted to the optional AM FM Unit when installed while the remainder is applied to the balanced ring modulator composed of Schottky diodes D399
91. t audio from the mi crophone before it is applied to the modulator VR3001 adjusts high frequency response and VR3002 adjusts low frequency response 3 4 SIDETONE VR3005 The CW sidetone oscillator pitch and volume are adjusted by these controls VRsoos adjusts sidetone pitch while adjusts sidetone volume SRR deme tic pt es 7 s CABINET BOTTOM 74 PLASTIC FOOT PAD SCREW M4 The feet on the bottom panel may be changed if it is desired to change the viewing angle for the FT 102 In the accessory kit for your FT 102 there are two extender feet with mounting pads These may be installed either in front or in back accord ing to the requirements of your station BOTTOM PANEL FEET 13 Downloaded by RadioAmateur EU INTERCONNECTIONS FT 102 SP 102 EXT SP P INPUT A B LINEOUT 102 FT 102 INPUT 102 1020 EXTVFO RCVR L TI FL 2100Z 102 UE OUT i IN T RY AG0 2 ee 22 This Manual Provided Courtesy of Greg VASVFO Vicio va3vfo rac ca dog At d gt DAY INTERCONNECTION CABLE INFORMATION 102 e FL 2100Z FT 102 ANT E P N T9101277 OPTION al 5 9 7 N
92. tivated this outer knob tunes the center frequency of the audio peak filter Its adjustment is also independent of the other controls 16 APF push button During CW operation depress this switch to activate the audio peak filter 17 SHIFT WIDTH This control consists of two knobs friction coupled for most convenient control over the IF passband during SSB and CW reception The flange of the round inner knob has a window cut out through which may be seen a gray and or black area con nected to the outer paddle knob To adjust the width of the IF passband rotate one knob while holding the other stationary The resulting width of the IF passband will then be indicated by the size of the gray zone showing in the window Once this has been set rotate both knobs together to shift the IF passband across the incoming signal Rotating the knobs to the left will pass the upper sideband USB and rotating to the right will pass the lower sideband LSB Refer to the Operation Section of this manual for additional details 18 PRESELECT This control tunes the driver stage for transmission at the operating frequency When the RF amplifier is ON this control also tunes the receiver input to the amplifier 19 DRIVE During CW AM FM and TUNE operation of the transmitter this control adjusts the level of the carrier During SSB transmission when the speech processor is in use this control adjusts the drive level to the pro
93. tput of 500 kHz regardless of the operating frequency This output is applied to phase detector 4 1 MC4044 which also receives a 500 kHz reference signal derived from 10 MHz crystal oscillator 4026 2SC945Q buffered first by 2 28C945Q and then divided by 10 at 741 590 again by 2 at MC14518 before final buffering at Q 2 28C945Q provides a DC output proportional to the phase difference between the VCO derived input and the reference derived input which is then delivered through active lowpass filters and Q4o23 2SC732GR to the varactor in the selected VCO thus locking the VCO frequency to the reference oscillator If the output from phase detector is too great to allow locking of the VCO an unlock signal is delivered through amplifier 28A733 to unlock switch 2SC945Q which disables first LO buffer removing the first LO signal from the RF Unit A portion of the switching signal from also switches Q4010 28C945Q which delivers a blinking command signal to the Counter Unit causing the display to blink when ever the PLL is unlocked The PLL local signal is derived from 10 MHz reference oscillator 25 and 19 21 MHz VCXO 28C9450Q along with VFO input Output from VCXO shifted appropriately for the selected operating mode by 2SC945Q and according to the IF Shift function
94. window represents the selected width of the passband while the position of this exposed gray area relative to the 12 o cloek position straight up represents the position of the IF passband relative to the true carrier frequency of the signal To use the SHIFT WIDTH system most effectively narrow the WIDTH to the estimated optimum the bandwidth that will eliminate the QRM or QRN without removing too much of the desired signal This bandwidth will depend on the relative strengths and transmit carrier frequencies of the signals as well as the noise level and will require some experimentation to achieve the optimum setting The special control configuration allows you to narrow the bandwidth while at the same time shifting the passband using only one hand to control both functions easily First grasp the round knob and rotate it slightly while holding the paddle stationary with one finger Observe the gray area through the control window and notice that a black area comes into view from one side of the window This black area represents that portion of the original bandwidth that is now blocked by the filter while the remaining gray area represents the remaining passband Secondly rotate the round knob paddle together by turning either to shift the narrowed passband across the received signal s bandwidth Note that as the remaining exposed gray area is positioned to the left of center the upper sideband si
95. witch Qsois in the CW and FM modes through Q3029 2SC380TMY Output for CW operation is buffered 27 2SC380TMY and applied through amplifier on the IF Unit to bal anced mixer on the RF Unit as for SSB operation Final amplification is the same The key lead from the key jack activates sidetone oscillator on the AF Unit and also controls switches 28A733Q 25 1815 and 2SA639Q to turn the biases to the tubes on and off 2 also keys post TX mixer amplifier on the RF Unit while also controls the 12V CW TX line to CW carrier oscillator 026 and offers a keyed control point at pin 2 of the ACCI jack The sidetone oscillator provides an output to audio amplifier and another output to VOX amplifier 1 to activate the VOX circuit for semi break in CW control AM MODE OPTIONAL AM FM UNIT PB 2347 A portion of the amplified and filtered speech audio from tone amplifier 4 on the AF Unit is delivered to AM modulator TA7069P on the AM FM Unit which also receives a carrier signal from carrier oscillator 26 buffered by Q3029 28C380Y also on the AF Unit The modulated AM output is then delivered through 32 IF amplifier on the IF Unit to final transmit mixer on the RF Unit as for SSB and CW and final amplification is the same FM MODE OPTIONAL AM FM UNI
96. y 70 full output power 2 Set the METER switch to IC and observe the dip in the cathode current The dip should occur at the same point that maximum power output measured on the dummy load watt meter occurs If this is not the case adjust TC located inside the final amplifier cage for the required coincidence of maximum power output and dip on the IC meter 40 Set the MODE selector to USB and tune the Oscilloscope HP 1222A Hewlett Packard or equivalent Spectrum Analyzer transceiver to the 14 MHz band HP 141T 8552B Set the MIC GAIN control fully counter 8553B clockwise minimum and disconnect the microphone from the MIC jack Press the MOX switch Tune an external receiver to the same fre quency as the FT 102 and adjust CARRIER BALANCE control for minimum signal at the external receiver Switch the MODE selector to LSB and repeat step 4 Switch back and forth from LSB to USB several times while adjusting to obtain an equal minimum output in the two modes Distortion Meter HP 334A Audio Generator HP 200CD Linear Detector HP 8901A 4 u LOCAL UNIT ALIGNMENT PB 2345 10 MHz Reference Oscillator 1 Connect the RF probe of the to and adjust transformer T4o 3 for maximum deflection on the meter approx 100 mV rms Connect the frequency counter to a
97. zed and the fault has definitely been traced to misalign ment Sudden difficulties are almost always caused by component failure rather than misalignment SECTION I The following adjustments can be made by remov ing the top cover of the FT 102 The controls are labelled on the plastic cover over the pc boards and can be adjusted with a small screwdriver You will need to have on hand a microphone CW key headphones and for the Carrier Balance adjust ment and external receiver in order to make these adjustments VOX Circuit Antitrip level setting 1 Tune in a signal on the FT 102 receiver and adjust the AF GAIN control for a normal listening level Position the microphone near the speaker with the MODE switch in the SSB mode Increase the VOX GAIN control on the front panel until the speaker output causes the VOX relay to switch the trans ceiver to transmit Set the A TRIP control located on the rear apron to the point that will just prevent the speaker output from tripping the VOX relay 2 Now place the microphone in the normal operating position and speak into the micro phone to see if your voice will activate the VOX relay If not VR may be advanced too far B VOX relay delay setting 1 Adjust the DELAY control on the front panel for the desired delay time This may require a different setting for phone and CW operation owing to differing operating techniques For CW or phone operation usi

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