KB2LJJ Radio Mods Database
Contents
1. FNx Select VFO A x 0 VFB B x 1 or MR x 2 ID Read radio ID TS 50 is 013 IF Read info from radio answer 1s Faaaaaaaaaaa bbbbbc ddefghijkk a 11 digits of frequnecy b RIT offset in Hz first char is Or c Q rit off 1 rit on d memory channel e O rx 1 tx f mode g 0 VFO A 1 VFO B 2 MR h scan off on 1 split off on jJ tone off on k ctcss frequency MDm Set mode to m http www kb21jj com data kenwood ts 50 htm 2 di 14 01 09 2009 0 05 12 KB2LJJ Radio Mods Database TX Transmit RX Receive SPa Split off a 0 or on a 1 mode 1 Isb 2 usb 3 cw 4 fm 5 am CTCSS 38 standard tones numbered 01 67 0 38 250 3 or 39 1750 Hz TS 50 Service menu actory Adjustments Hold down NB and MHz keys Power ON Turn the Frequency Tuning knob to change menu number AO Checksum diplay version of YOUR installed pgm Al RIT center Initial value 80 A2 IF Shift center Initial value 80 A3 LSB carrier point Initial value O A4 USB carrier point Initial value O A5 S meter adjust S1 not FM Initial value 2E A6 S meter adjust S9 not FM Initial value 73 A7 S meter adjust full not FM Initial value C2 A8 S meter FM start Initial value 91 A9 S meter FM full scale Initial value CC AA RF meter adjust low 10W Initial value 3C AB RF meter adjust middle 50W Initial value 80 AC RF meter adjust high 100W Initial value B1 AD Write to Eprom by pressing UP or DOWN key Kenwood TS 52. Keywed TS 0S T ANU INTERFACE o Nb GND a Pi SUTHERLAND ND 2002 phil clew com au 1 I i http www kb21jj com data kenwood ts 50 htm 5 di 14 01 09 2009 0 05 12 KB2LJJ Radio Mods Database Tx mod for TS 50S originally from Sydney Australia in 1995 Review the mod where the coloured picture of the control board is provided This shows a picture of D5 The pads for D1 through D5 are obvious on the control board which is piggy backed on the PLL board with 2 multipin sockets and 2 screws This radio only had D4 obvious snipping it did not do the job D1 D2 and D3 were not fitted D5 not fitted next to D4 see below Disconnect the power Ground the radio and keep one hand on the metal work or use a wrist strap to ground yourself Locate the Control Board as it says in the Instruction Manual for Options Installation and TCXO UNIT SO 2 Remove the control board as it says in the book The 3 plugs are not as such plugs the catch bar releases the ribbon cable and is easy to push apart but a bit fiddly to get back in 3 hands might be needed and you have to push the bar down as well as in Very little force is needed Do not force it if it wont go in then you have not got the right angle The 2 screws required the use of a special tool which was not available A fine pointed set of side cutter wire snips can be used to tightly grip the round headed screws by the
3. Procedure Immediately after replacing the Lithium battery you must cycle the radio ON then OFF Failure to follow this procedure will result in premature failure of the battery If the power is not cycled ON then OFF the microprocessor will immediately begin drawing approximately 1 mA of power from the Lithium battery resulting in poor battery life When the battery is replaced we recommend the insulation sheet also be changed Part numbers for the battery and insulation sheet follow Parts required Qty Description Kenwood Part No Circuit description 1 Lithium battery W09 05 15 05 BAI 1 Insulating sheet F20 0521 04 Caution This modification requires soldering equipment rated for CMOS type circuits It also requires familiarity with surface mount soldering techniques If you do not have the proper equipment or knowledge do not attempt this modification yourself Seek qualified assistance Problems No display illumination LEDs On Air AT TUNE no function The menu item 2 has no effect display keeps always dark All other functions normal Possible reason Bad contact LCD Assy for 5V line to R9 R10 and ICS Power on the TS50 and check voltage at R9 R10 If voltage is OV but display readout is active the reason might be as discribed Measurement to fix it Look for the small hole near R9 at the LCD Assy component side view where the contact between the two sides of the LCD Assy is located http www kb21jj com da
4. insulated jumper wire as shown below Parts required Qty Description Kenwood Part No Circuit description 1 1 uF chip capacitor CK73EB1E104K C125 1 10 uH Ferri inductor L40 1001 48 L102 Cut foil path and inatall chip inductor Lif here juniper wire Final Unit X45 3460 00 B 2 Foil side View Caution This modification requires soldering equipment rated for CMOS type circuits It also requires familiarity with surface mount soldering techniques If you do not have the proper equipment or knowledge do not attempt this modification yourself Seek qualified assistance http www kb21jj com data kenwood ts 50 htm 9 di 14 01 09 2009 0 05 12 KB2LJJ Radio Mods Database When the transceiver is subjected to vibration a mechanical noise can be heard from the output transformer area This has led to concern by several consumers that something is loose or improperly installed Corrective Action In order to ease consumer concern toy should add a cushion under transformer L4 as shown in the accompanying diagram and replace transformer L13 at the same time This transformer has been fastened to the circuit board with high temperature adhesive so use caution when removing it from the circuit board Parts required Qty Description Old part No New Part No Circuit Description 1 Cushion NA G13 0871 04 Under L4 1 Output transformer L39 1209 25 L39 1252 05 L13 oS teinsionmer Li Service Bulletin no 1015 10 May 1993
5. 0 to Icom and LDG ATU Interface This article describes the result of my investigations into connecting automatic ATUs to the Kenwood TS 50 HF transceiver I wanted to use my TS 50 in a mobile environment but was irritated by the lack of integration between it and the Icom AH 2 automatic ATU that I was also planning to use All of the mode and power switching required to get the automatic ATU to tune seemed to me to be a waste of effort and possibly dangerous while driving There had to be a better way I started off by looking on the web for information but there appeared to be very little out there On www mods dk my usual first port of call for these sorts of things the closest I got was a writeup by DF6KR on TS 50 to AT 50 serial communications these two boxes talk using a 4800bps inverted serial communications scheme Having found this I decided that a small microcontroller could easily emulate the AT 50 and provide control to a dumber ATU However by accident while collecting further information on the serial protocol I made a wiring error and an interesting discovery Dumb Mode It turns out that the ATU interface on the TS 50 can work in two different modes As well as the serial interface scheme there is a second mode If you link the TS and TT signals on the ACC ATU connector then the TS 50 detects this at powerup and goes into this alternative dumb ATU control mode This mode has the following features The AT TUNE butto
6. 4 on the digital unit X46 315X XX On TS 50S_ the mod is the same except cut D5 as well to enable Enable this mod entirely at your own risk and responsibility Note enabling the double zero mod you will lose the RIT display it s activation is now indicated by a beep To reverse enable a partial reset by holding down A B and switch on or retain the 70 85 key 4 mic setting and normal function will resume at a key press http www kb21jj com data kenwood ts 50 htm 6 di 14 01 09 2009 0 05 12 KB2LJJ Radio Mods Database As the most of you TS 50 Users surely know it is possible to increase the Medium Power the Low Power but not the High Power Setting Reason There is no Trim Pot it is a small SMD Resistor With that small Modification you ll get a Trim Pot and the TS 50 is able to run up to 180 W output without any problems Remove Top Cover and hook out the internal speaker Place the rig top up display to you The area you need is closed to the left side of the CW Filter Board on the main RF Board where the Filter Board is screwed on On the board is printed on PL PM PH and an arrow Above are two pots and two little black chips the right one SMD Resistor is very closed to the second pot Remove this SMD Resistor R214 10k wich is located closed above the two pots for Med and Low It is a VERY small black chip marked with 103 Be CAREFUL while soldering Make yourselfer a small Board 25 mm long 8 10 mm wide
7. At one end drill a centered 3mm hole closed to the edge of the board Solder one conventional 4k7 Resitor standing a 5k6 or 6k8 also can do it and a conventional 10k Trim Pot lying in serial order on this board Make sure you make no shorts and build the circuit as narrow as possible and very closed to the reverse end from where you drilled the hole in you later need 10mm space at the drilled end Filter Board Pot R 4k7 10k Connect two two fine wires length aprox 20 mm at the ends of this little circuit and solder it CAREFULLY to the free solder joints of the resistor To make it a bit easier the right one you can solder to a joint about 4mm away of it just follow the small trace to the right and you will find this lonesome contact Remove the screw of the CW Filter Board place your little board hole on hole on top of the Filter Board and Re Screw the two boards together to the main board So your little Tuning Unit is fixed hanging above the Med and Low pot Connect the rig to a power supply 25 30 Amps a power meter a dummy load and switch it on No smoke So you might have done everything all right Push a FM Carrier on 14Mhz and set the new pot on the desired output My TS 50 can do max 185 Watts but I have adjustet it to 150 160 so it modulates fine 130 Watts SSB with the original mike what a difference to that 70 before Don t adjust it to high think about your finals and filters http ww
8. KB2LJJ Radio Mods Database Kenwood TS 50 50S Scrolling down for all information Speech clipping in the TS 50 RSGB s RadCom J une 1997 INTRODUCTION For DX work a speech pocessor should be an advantage but the KENWOOD TS 50 does not have one The Simple speech clipper proposed here does add punch to the signal It produces more distortion within the pass band than SSB clipping but if the microphone gain is not set to high this is inaudible it causes no platter TXLX UNIT 57 4220 11 TH R154 ick 70 Ee 5 E i k F r v E ae Ls r be fee be ay N T b F L a a F P ees A eo 4 li 5 i ps 7 mi r 7 F BAFL EA 1 ie Fih 3 E J ak E EE 1 amp j A TIE Ee a s ae j i a J an 7 P i 7 5 3 i a a T ae a q 1 at z e E igs 1 A ee ome a it ett A 5 any yr cf IRIS ie Rem P 3 Er F T ny eth aaa Ea Fig 1 W en a ttt P a a oe ee ae naza EE DEN os DESCRIPTION The clipper Fig 1 consist of a pair of back to back 1N4148 diodes in series with a 10 nF DC blocking capacitor It is connected between the collector of Q42 and earth threaded bushing A1 on the TX RX UNIT X57 4220 11 Q42 is the 10 695 MHz double sideband amplifier http www kb21jj com data kenwood ts 50 htm 1 di 14 01 09 2009 0 05 12 KB2LJJ Radio Mods Database between the balanced modulator and the 2 4 kHz SSB filter The latter removes intermodulatio
9. d which you can do with a fine screwdriver and a bit of fiddling Once you ve formed the connector and proved it fits you can then also cut away sufficient of the locking tab that the connector will hold in place correctly despite being offset by half a pin from its correct location Of course 1f you can find a retailer who ll sell a small quantity JST brand ELP O6V plugs and associated pins then you have no need of this workaround I ve not been so lucky thus far Summary and Disclaimer With a handful of cheap components it is possible to connect a TS 50 to several different automatic ATUs This exercise solved a problem for me I hope it makes life easier for you too I m always interested in feedback on this design so feel free to get in touch at the email address above if you have comments Please also understand this article is published in good faith and I m using the circuit myself but in the end the responsibility for any blown up rigs or ATUs is yours alone Take care CIENT m TATU is 29 ICOM AH AYU condor ae st gv Mt ees L Viewed on back gf rig l T nF i 3 cup Th ATEND i TUN g ono 10k k Ta jis Do po Ha 3 or vvo i Nje TS WV am S dak OSs pF i zir Y yag CERAMIC J 4 l Xe ie a 1 i i l IM Sy S 7 5 yF ly lokt 14 a T R E 2 R 33k 2 TEC 3 1 74 Ika l 4066 ces ae 10 lt KEY RTH Fpb a 7 2 i cnd A LT pF myl 7 5 Takk E 12N
10. dimples Suggest you locate the 2 white plug sockets visually by looking under the Control Board before you pull off the Control board from the PLL board so that you dont bend the pins since it has to go strait up at both ends Under the board under D5 was found what looked like a blob of opaque glue about 4mm diameter Under this glue could be seen a black speck The glue was levered off and a Surface Mount diode came off with it breaking away from the PCB track Diode about 1 5 1mm Obviously this blob was doing the function of D5 A full Microprocessor Reset as it says in the Instruction Book gave the desired result Other changes were also successfull See instruction manual MENU SET UP USB below 1OMHz alter Memory location A04 from SSB to ULC Double Zero on frequency display put 85 into memory B70 instead of 82 Note also the mod in mods dk which explains what to do if the memory battery is changed or disconnected On replacement of the memory battery you have to cycle the radio on and then immediately off otherwise the memory battery drain is 1mA and it will go flat very quickly PS WANTED Does anyone know of a mod to make the Kenwood TS 50S radio switch on with the Low power option setting set Altering Memory A00 to 10 does not do this The radio switches on in the power setting you last used it in which is not good for manual tuning if that happened to be high power New TS 50S to enable Wideband TX cut D3 amp D
11. e is provided using a 74L05 miniature 5V regulator running from the 12V feed from the TS 50 ATU connector The resistor and zener on the regulator input are to provide extra protection from ignition spikes in a mobile environment but may not be so necessary as the TS 50 has an internal protection diode Note that I ve not included a fuse on the drawing the TS50 has an internal 4A fuse on the ATU interface 12V output line but on reflection putting a low current fuse in the power feed prior to the voltage regulator is probably a good idea The circuit itself should draw no more than a few milliamps This circuit could probably be improved with better understanding of the TS 50 It s still based on my observation that looping back TS TT puts the ATU interface into dumb mode My initial attempt at a design took a logic interface approach to the TS TT connection but I found that in some circumstances it appeared that TT was also driving the loop and so this approach didn t work The use of the 74HC4066 is thus a little bit of laziness as an analog switch it s the closest thing to a real loop I could easily control and it stops me from having to understand the full complexities of the interface In my original breadboard I used a normal CMOS 4066 rather than the 74HC flavour It worked fine but Len a greybeard hardware engineer friend who kindly reviewed my design suggested that the 74HC version has a lower on resistance and will work better with 5V l
12. er on comm 2 Power on answer 3 Auto on request 4 Auto resume finished 5 ok at50 6 ok answer ts50 2 DOWN UP Communication TT OROZ OF Lis UP trom 1 8 CO 345 Tos OBUZs OF 11 same ORUA UROA OFL OFL UP oso gt 7J OEOS 7 0ROS F UFILIL7 Orit UP 7 gt 10 VEOG OCORUGsUFII OF LI UP 10 gt 14 OEO 77 0ER0 77 ORI OF LL UP 14 gt 18 QEQS7 0E0G 0F11L 0FL UP 18 gt 21 0EOS O0HO9 0F11 0F11 UP 21 gt 24 5 0EOB O0ROB OF 1 0F 11 UP 2f Dm7 oe OEOC OEOCFOFIL 0FL UP 28 gt 29 UFOs OE0 OFI OF LI UP 29 gt 1 8 DOWNS OFOC ORUC OFrlIisUrii ODEOB ORCOBsOPLI Or 11 OEUF OROLsOF IIs Ori 1 TUNE 0D037 0D0370F41 0F41 AUTO OFF THRU ODOO O0DO0 AUTO ON UDO OPO 1 tune error 00032 0UdUS UF GS 2 0Fs33 http www kb21jj com data kenwood ts 50 htm 12 di 14 01 09 2009 0 05 12 KB2LJJ Radio Mods Database TX Coverage mod TS 50 ust got a spanking new Kenwood TS 50S Searching around the local LLBBS s I found a very simple mod for full transmit from 1 7 30 mhz Remove the bottom cover of the TS 50 Locate the PLL board it is the pc board on top of the main board it has a shield on it s right side Locate the only non surface mounted component on the PLL board look near the rear left hand side of the pll board front of radio facing you and remove the very obvious diode You can t miss ther s only one X46 3150 1 a J72 O0255 32 Replace cover http www kb21j
13. j com data kenwood ts 50 htm 13 di 14 01 09 2009 0 05 12 KB2LJJ Radio Mods Database COLOCAR 1 DIODO 1N4148 CATODO TP 4 ANODO JUNCAO DE R 81 ED 28 COLOCAR 1 DIODO ZENNER 2V4 400MW CATODO PINO CENTRAL DE VR4ANODO TP S5 APOS COLOCAR OS DIODOS LIGAR O RADIO CF1 fe COLOCAR CONTROLE SQUELCHE DIA E L E AUSTAR VR 3 PARA QUE ABRA O SQUELCHE OBS O AJESEE DO MGUELCHE DEVERA SER FREDO EM AM COM AIP A TTETON E SEM ANTENA J i PYSET CELIO D S KIQTHERA RADIO ON AM AIP ATT ON ANTENNA OFF CONTRL SQUELCHE CENTRO ADJUST VR 3 OPEN SQUELCHE o Remember it is Illegal to transmit out of band This Modification is for Informational purposes ONLY Doing such modifications on your radio may void any warranty and damage your equipment All mods found on this database are offered to me by other amateur radio hams or captured by Packet system KB2LJJ take no responsibility or liability for any damage done resulting from any modification http www kb21jj com data kenwood ts 50 htm 14 di 14 01 09 2009 0 05 12
14. n products of the clipping proces outside the normal pass band This clipper also eliminates the tendency of the TS 50 to splatter when speaking into the microphone too loudly INSTALLATION Refer to the manual on page 55 Remove the lid Remove the speaker and its mounting plate Unscrew and carefully remove the IF filter PCB Locate with figure 1 the clipper connection points on the main PCB and solder using the threaded bushing A1 as the earth point Check the clearance between the clipper components and the filter PCB Reassemble ADJUSTMENT In CW mode send a fast string of dots into a dummy load through an analogue SWR power indicator and note the average meter deflection Swith to menu B nr 66 H Switch to SSB and speak into the microphone in a normal voice Adjust the yellow VR7 for an average meter reading just below the one previously noted Notes on communicating with the TS50 it appears to be the standard Kenwood format that most of their radios use Kenwood TS 50 programming info Full duplex serial 4800 Baud 1 start 8 data 2 stop bits No parity TTL level Commands consist of a 2 char command parameters and a semicolon terminator Error messages Syntax error or radio in wrong mode E Communications error O Processing not complete FAQ0007000000 Set VFO A to 7 MHz Freqs are 11 digits in Hz FA Read VFO A FBO00007000000 Set VFO B to 7 MHz Freqs are 11 digits in Hz FB Read VFO B
15. n starts to work Pressing the AT TUNE button on the rig will temporarily select low power and key the transmitter in CW mode Pressing the button again will cancel this and return the rig to normal operation If the tune operation is not cancelled within 30 seconds the TS50 starts beeping at you to remind you that the transmitter is still active Thus with no http www kb21jj com data kenwood ts 50 htm 3 di 14 01 09 2009 0 05 12 KB2LJJ Radio Mods Database changes other than a loopback wire you can have a single button to perform the necessary transmitting for atu autotuning While the rig is idle the TS signal sits at 5V During the AT TUNE operation it drops to OV taking TT with it as they re looped You can detect this state change and use it to trigger an ATU tune cycle If during the ATU tune cycle you break the TS TT loop for a short period a few hundred milliseconds and allow TT to float high then the AT tune operation ceases and TS returns to 5V This will allow a simple circuit to monitor the key transmitter line from the ATU and temporarily break the TS TT loopback when transmitters keying ceases to end the TS 50 transmit cycle Note that at least on my TS 50 the TS and TT interface signals comprise the centre column of contacts on the ACC connector TS is on the bottom and TT on the top On one of the mods sites I ve seen a different set of pinouts for the ACC connector this is either wrong or there s more than one po
16. ogic levels on the switch input My interface works happily with the Icom AH 2 ATU I believe the AH 3 and AH 4 also have the same interface The LDG Electronics RT 11 has an effectively identical interface too Note that if the ATU tunes very quickly lt 0 5 second at times then you may need to reduce the length of the TUNE pulse otherwise it may try to tune a second time just as the transmitter turns off You d do this by reducing the values of the resistor and or the capacitor on pins 14 and 15 of the 74HC123 Pulse duration is about 0 45 times the product of the resistor and capacitor values ACC Connector You can make an adequate if not beautiful substitute for a real ACC plug on the TS 50 from a broken ATX style modern PC power supply If you don t have one in your junkbox you may be able to charm one out of your local PC clone shop mine didn t even charge me which may say something about PC power supply reliability The main connector that goes onto the PC motherboard from these power supplies is the correct pitch but has far too many contacts some of the wrong shape With some judicious scalpel work you can reduce the connector to six contacts and then remove all of the plastic on the three of these that go into the circular holes leaving only http www kb21jj com data kenwood ts 50 htm 4 di 14 01 09 2009 0 05 12 KB2LJJ Radio Mods Database the pins This latter part of the process is easiest done with the metal pins remove
17. ssible wiring setup out there Note also that the TS 50 does its dumb mode detection at power up It brings TS high then pulses it low for about 120ms Any tune detect circuit should thus make sure that TS has stayed low for longer than this before starting the antenna tune cycle Interface Circuit The diagram shows the circuit I used to make the interface to an Icom AH 2 ATU work The TS TT loopback is provided by one quarter of a 74HC4066 analog switch device This device loops back TS to TT whenever the control input on pin 13 is high which is most of the time Note that the control inputs for the unused switches on the 74HC4066 pins 5 6 and 12 are grounded The top half of the 74HC123 dual monostable is used to deliver a positive pulse of approximately 500ms duration when a negative edge is sensed on the TS TT loop indicating that a tune operation has commenced This pulse turns on the BC549 transistor grounding the TUNE signal and initiating tuning on the ATU The bottom half of the 74HC123 is used to detect a positive edge on the KEY signal on the LDG RT 11 ATU this is called 706 OUT probably because the Icom interface uses it from the ATU signifying that the ATU has finished keying the transmitter Upon sensing this it delivers a negative pulse of approximately 500ms duration to the switch input of the 74HC4066 breaking the TS TT loopback for this period This tells the rig that tuning is complete Power for the interfac
18. ta kenwood ts 50 htm 10 di 14 01 09 2009 0 05 12 KB2LJJ Radio Mods Database If you have no service manual This is the side oriented to the front side of the device R9 R10 are located close to the two LEDs Take a small size needle to pick through the contact hole to encrease the diameter Make a contact between the two layers by soldering a piece of wire across the hole Check the 5V at R9 R10 Swit wiz Swi3 SAM 1 pp a ree TS 50 lt gt AT 50 Communication i as measured discovered by DF6KR No guarantee for whatsoever Communication method Serial interface Tranfer rate 4800 bps Synchronization Start stop Asynchronous Parity None Signal tornat TTL level pat i Ground http www kb21jj com data kenwood ts 50 htm 11 di 14 01 09 2009 0 05 12 KB2LJJ Radio Mods Database ii T 4 3 25 TT TS50 lt AT50 TTL ACC Se TS T350 gt AT50 TIL i 4 5 i Ge op ae Mets 5 ATG Signal ground SSS SS SSS 4 52555 6 Piseov from TS50 Rear Panel Connector ACC Timing 1 at Power on 1 3 6 TT gt leto S6C gt gt or 2 4 5 TS gt lt 600ms gt O 90ms resume time C Signal 1 2 6 Pee ees JDU OF Lis 2 4 5 To OCs opor Ori 1 Pow
19. w kb21jj com data kenwood ts 50 htm 7 di 14 01 09 2009 0 05 12 KB2LJJ Radio Mods Database desired SMEA Filter Board amp Screw neg ON the new version are 4 diode on de board Cut remove all D1 D3 D4 D5 Then RESET the Kenwood TS 50 http www kb21jj com data kenwood ts 50 htm 8 di 14 01 09 2009 0 05 12 KB2LJJ Radio Mods Database This modification makes the double zero display full time Turn on radio Go to MENU B item 70 Program 85 into item 70 This puts the double zero on the 4 PF4 button on the microphone Press the F LOCK to get out of the menu function Press F LOCK ON Press and hold PF4 button on mic While holding PF4 button down on the mic press and hold the SPLIT button Release the PF4 button then release the SPLIT button Turn F LOCK off Go back to MENU B item 70 and remove 85 or change the number Symptom Occasionally an Hello message will appear in the display of the transceiver when the TS 5OS is loaded into a antenna without the use of an antenna tuner This symptom usually occurs when the negative terminal of the power supply is floating un grounded for RF This can result in RF feedback that causes the supply voltage to exceed to 16 Vdc Corrective action Cut the Final Unit PC Board foil in two places as shown below Add a 01 uF chip capacitor C125 as shown below Add a 10 uH chip Ferri inductor L102 as shown below Add an
Download Pdf Manuals
Related Search