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HP 467A Power Amplifier/Supply Operating & Service Manual

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1. are shorted to ground by C109 Low frequency stabilization and over ali amplifier gain between dc and 50 KHz are provided by applying dc feedback from the OUTPUT to Q109 base The ZERO potentiometer R5 providesan adjust ment to compensate for dc drift in the instrument VaryingR5 changes the voltage at 0109 base thereby changing the output 1 of the low frequency ampli fier 4 15 DIFFERENTIAL AMPLIFIER 4 16 Differential amplifiers Q102 and Q103 provide an output proportional to the input signals from the high frequency amplifier Q101 and the low frequency amplifier circuit Q109 and Q110 The high fre quency ac Signals are coupled to Q102 through C104 the dc and low frequency signals from the low fre quency amplifier are direct coupled to differential amplifier Q103 Capacitor C1 8 bypasses any high frequency ac from the low frequency amplifier to 4 1 Section V ground C109 bypasses any high frequency signals present at the base of 9103 Ac feedback from 0105 collector circuit is applied through C115 to the base circuit of Q102 for high frequency gain stabilization 4 17 VOLTAGE AMPLIFIER 4 18 The voltageampltifier 0104 supplies the majority of the voltage gain for the instrument Degeneration at low frequencies is provided by R127 in the Q104 emitter circuit C116 provides added phase stability at high frequencies Current through R125 provides the bias current for Q105 Breakdown diode 104 es
2. Chicago Ill 43990 Nosgten Co Eqglewood Colo 44655 Mig Co Skokia dll 45384 Pesn Eng amp Corp Doytestnas Pa 47904 Polaioi Corp 2aabndge Mass 48520 Precision Thermometer amp Inst Co oclhanoton Pa 49956 8 Pawer Tube Div Wallitam Mess 52090 Rowan Contrnite Co Wesiminster Md 52993 Sanborn Company Waltham Mass 54290 hallcioss Mig Co Salma N C 55026 Simpson Floci lc Co Chicago Ill 55933 Soootona Elmsford N Y 88938 Raylheon Commeitral Appatetus 2 Syslems Oiv So Norwath Conn 613 Spaviding Fidea Co lac Tonawanda N Y 6268 Spiagee Eiectrzc Co Neh Adams Wass 9446 Telex Corp Tulsa Okla 9730 Thomas amp Betts Co Etizabeth N J 60741 Tripiell Eloctivcatinst Ca Bluffton Onto 61775 Union Switch and Signal Div of Wastingbousn Air Biake Co Piltsburgh Pa 015 4 Revised Aoril 1969 Code No 82119 63743 64953 65092 66295 66348 10276 70209 70318 70417 10485 70563 70674 70903 70936 71002 71034 71041 11218 71278 11265 71313 71400 71436 11447 71450 71468 11471 71482 71590 71616 71700 7170 11744 71785 71984 12136 72613 72655 12659 72765 72825 71978 12962 72954 72962 73851 73076 73138 13293 73445 73506 73554 73586 73662 73736 73743 13793 73846 Monufocturer Address Owosso Mich Vernon Usivezsel Co Word canard Electuc C
3. meter T trassfermer 2 netwerk ABAREV ATIONS ID juside diameter us panosecond s 1 at glide mpg impreguated secenda SPDT single polo double into incandescent u amp r net separately replace throw fos Lamilation fed able SesT slagle pola oiie throw k nb 8 1077 ohms 2 ehm s 6 E am kBz 10 nertz Us WIRED NP TC temperature coefficient TiO titanium dioxide L inductor peak Ita linear 1 t v toggle log Jogarithmjt taper pc printed circult ioe dol aps 12 uim trimer m iilii 10 pF ao al 0 Lransistor mA smillimpere a 107 piv peak inverse voltage v valt 2 amp nipereg part af vacw alle nUn current Mu megehertz 10 bertz pos position a working veltage MR megobm a e 10 6 ohms paly polystyrene var variable met im roetal pot potenti ameter vdcw direct current working m c manvfacturer peak to peak veltage mtg gt moonting E ppm Karts per million mv milliwalt s 10 valts prec precision temperature W w2tt 3 T a picro 10 8 6 coefficient 1 0t tera with microvoit lt 10 votts stability and or tol wy working invorse voltage w o without my 9 ww whrewound nA nandampere u 10 R reetetor optimum value celect d amperes Ry rhodium t factory average NC normally closed rms root
4. 428B and a 40 ohm 5 10 watt resistor hp will be required for this test Part No 0815 0028 will be required OC VOLTMETER hp 3440A 3444 o 9 Q Q h P 467A age POWER AMPLIFIER TEST OSCILLATOR hp 651B ADAPTER soon taon BNC T UL MT ITS o BENI hp 1250 0072 F E VOLTMETER hp 331A 452209 0 o 9 Figure 9 6 Balance Adjust 4678 0 O07076 5 6 Scans by ArtekMedia 2008 Model 467A b Connect Model 467A as shown in Figure 5 6 Set DC Voltmeter FUNCTION to VOLTS RANGE to 1000 mV Set Model 467A to AMPLIFTER 10 e Adjustoscillatorfor 1 4 V rms 300 KHz out put Use AC Voltmeter to verify 1 4 V rms Signa level Tune C124 to minimum dc output as read on DC Voltmeter 5 29 HIGH FREQUENCY COMPENSATION ADJUST MENT C301 C303 C305 Figure 5 7 describes the test arrangement recommended ATestOscillator hp Model 651B 600and 40 ohm loads and an AC Volt meter hp Model 332A will be required b Connect Model 467A as shown in Figure 5 7 Set Model 467A to AMPLIFIER X10 Set the Test Osciilator 651B frequency to 1 MHz Adjust AMPLITUDE and OUTPUT ATTENUATOR for AC Voltmeter reading of 1 0 V Set 467A to AMPLIFIER X5 Tune C305 for an AC Voltmeter reading between 0 498 and 0 502 e Set Model 467A to AMPLIFIER X2 Tune C303 for an AC Voltmeter reading between 0 198 and 0 202 f Set Mo
5. gt ARD WEATHOMIOS S3 0830 UNDOIVIN SoMa ONDOIYW 18014 6210830 CC TNA Y 4 MO CANTON ELS FOS LAO LOSI Se ERIVHYAOHOUN NI XONYLIOYA4YO EMRO 3ONVISEXH LO PI EACTTO4 NADIE TUY SAITTIVA Lao mod HOLLY REA T POCO SO WO MOLLY AT8NSSSVUIIS HO TOSS HLLM RAO THY SMOLLVNUHSYU IDA ITE TWILEW 3108 211081825 care ST ea i er Arete A 9041286 Vier 1690204 Es JS ue mm e AN INOD Ob FMI tay MO a Age 1 4ndt 37400 G ir S neos EAE Ag 1 goi CRT Ad gt eu dd Cr Ads A row ape Abd ud Wo 1010 CB dit i AJ AE ido 71 rex age ifu sow zoo Peace E Aree 904 AST POH goa artis MN Me SCHEMATIC NOTES PARTIAL REFERENCE DESIGNATIONS ARE SHOWN PREFIX WITH ASSEMBLY OR SUBASSEMBLY DESIGNATION S OR BOTH FOR COMPLETE DESIGNATION COM PONENT VALUES ARE SHOWN AS FOLLOWS UNLESS THER WISE NOTED RESISTANCE iN ORMS CAPACITANCE IN MICROFARADS DENOTES MAIN SIGNAL PATH
6. OA 48 440 YWA AGT 97ga CHANGE 2 Apolie to Serial Numbers 9489 02246 and Above Page 6 2 Change A1CR114 Part No and description to 1901 0050 Diode Si 200mA CHANGE Applies to Serial Numbers 994 02386 and Above Qn the foliowing pages and figures the ground symbols will be changed as shown unless otherwise noted Front cover Page 1 0 Figures 3 1 4 1 and 5 13 Figure 5 14 not change earth grcund from center termina of J5 is changed to am rh 15 changed to rh on the printed circuit boards is changed to CHANGE 4 Applies to Serial Numbers 0994402666 and Above Table 6 1 Change Panet front to 00467 00204 Cover side to 5000 8565 Cover bottom to 5000 8577 and Cover top to 5060 8561 Suppplement A for 00467 90003 Page 2 CHANGE 5 Applies to Serial Numbers 0994403171 and Above Page 5 11 5 12 Page 8 2 Tabie 6 1 Delete A1CR108 1901 0025 Page 5 13 5 14 Page 6 5 Table 6 1 Change A1R 156 to A1R 180 Correct ihe Part number to 0698 4364 17 4 Q CHANGE 6 Applies to Serial Numbers 0994A03221 and Above Pages 6 6 6 7 and 6 8 Table 6 1 Delete Cable Assembly Main 00467 61601 Add Cable Assembly Main 00467 61611 Delete JS and J9 1250 0318 Delete Knob bar 0370 2077 Add Knob bar 0370 0084 Add Knob round 0370 1099 Delete BdgPost Red 1510 0808 Delete Bdg Post 1510 0009 Add Binding Post Ass
7. OPERATING AND SERVICE MANUAL HP 467A POWER AMPLIFIER SUPPLY 467A HEWLETT hp PACKARD I 9 IL ce gt Scans by ArtekMedia 2008 CERTIFICATION The Hewlett Packard Company certifies that this instrument was thoroughly tested and inspected and found to meet its published specifications when it was shipped from the factory The Hewlett Packard Company further certifies that its calibration measure ments are traceable to the U S National Bureau of Standards to the extent allowed by the Bureaws calibration facility WARRANTY AND ASSISTANCE All Hewlett Packard products are warranted against defects in materials and workmanship This warranty applies for one year from the date of delivery or in the case of certain major compo nents listed in the operating manual for the specified period We will repair or replace products which prove to be defective during the warranty period provided they are returned to Hewlett Packard No other warranty is expressed or implied We are not liable for consequential damages Service contracts or customer assistance agreements are available for Hewlett Packard products that require maintenance and re pair on site For any assistance contact your nearest Hewlett Packard Sales and Service Office Addresses are provided at the back of this manual gsm E ap OPERATING AND SERVICE MANUAL HP PART NO 00467 90003 MODEL 467A
8. DENOTES FEEDBACK PATH DENOTES ASSEMBLY p EU DENOTES COMPONENTS NOT MOUNTED ON ASSEMBLY DENOTES FRONT PANEL MARKING ____ HI DENOTES REAR PANEL MARKING a a DENOTES SCREWDRIVER ADJUST RELAY IS SHOWN DEE NERGIZED TEST VOLTAGES SHOWN ARE NOMINAL 105 WITH 81 IN SUPPLY 20 V VOL TS FULLY CW SHORTED NO OUTPUT LOAD Scans by ArtekMedia 2008 bI S EI S Ajddng zamog ae m uM V P 9 1 2 92182 2 gt a 1 1 016 2 91 8 IH9 09 M cum 68149 1 ee i mlam LIAN MSS ud 8 1 93H 53 35 934 631835 SWH i 8 80 A 40 v 2 O bl Li er 4139 OR 11 30 1 I 1091 0 29 ANVdWOD 2 4 11371M3N 596 1H9IlHAdO2 1 5 71 IHD M 1 ET E Ave 1 2 0149 IbIHD 259 5 1 i00 tt 100 rn T 0049 42 lt 9 li li I iso H 22 odis 6215 i n y i 328005 WIN ZR isd t belo 022 i 1 430 Ap iiu Si te ne re 26 2 7771 1 1 1 i i 12182 i I Ape SWY
9. Depth 11 279 mm Scans by ArtekMedia 2008 Scans by ArtekMedia 2008 Model 467A Section I SECTION GENERAL 1 1 DESCRIPTION 1 2 The solid state 467A Power Amplifier Supply is a 10 watt peak power amplifier and 20 to 20 volt power supply The power amplifier has wide bandwidth with low drift from dc to 1 MHz offering wide applications wherever power source is re quired Lowdistortien lt 0 01 low drift and 0 3 gain accuracy are obtained with high quality compo nents and multiple feedback techniques The gain of the amplifier may be varied between one and ten by a front panel switch which provides fixed gain steps accurate to 0 3 variable gain control enables the user to set the gain anywhere between zero and ten with a resolution ofbetterthan 0 1 of full output Table 1 1 gives the specifications for the 467A Power Amplifier Supply 1 3 OUTPUT CAPABILITY 1 4 An output greater than 20 volts peak and 0 5 ampere peak is available from dc up to 1 MHz The amplifier is protected at all times from short cir cuits The input circuit of the 467A is protected against damage from voltages up to 200 volts p p INFORMATION Input and output connectors are provided at the front and rear of the instrument The amplifier is a three terminal device isolated from chassis and may be floated up to 200 volts dc above chassis ground 1 5 POWER SUPPLY 1 6 A front panel switc
10. Ri34 CRII5 aso uo AME RI4 ME _ Nam RI51 8 RI39 1102 6123 24 uc RI43 EM e RI3I1 RIOI m e 5 CRI22 RI42 ON BACK 2 RISO CRIOI L Ri52 26 0 ROSE N 32 7 RI8 2 Miss RI50 Ri22 RIO2 RI03 RI36 p 02 CI03 m 77 CRIO7 Kn CRIOB CR 06 _ 09 CRE iA CRIO dem Eg wea m siga 04 CI09 rRig 0 CRII2 AP BI CRII3 05 RIIS CRII4 0102 ClO6 CH7 Cll5 2 RI41 __ RI26 RIl4 9103 CRI45 RI lt 5 RI24 qua RI23 RI38 Gi 0104 29 RI28 LI03 RI65 CRI43 CRI25 nm CRi24 CRI26 RI54 RI55 CRI28 R153 CRI27 RI64 CRI44 CRI40 CRI4I BRIAB CRI42 RI60 CRI35 28022 CRI36 CRIZ0 CRI33 ls CRI29 012 cri32 CRI37 ai CRI3I hp Part No 00467 66501 Figure 5 12 Printed Circuit Board A1 Parts Location Abe gt ASI l 0051 004 eu SO prim ANTdHOOS 1131 3H LE FEI 1MS14ASC os 3 215 iB
11. 1 4 W ww 5 0094 K ohms 0 05 1 4 W ww 5 0132 K ohms 40 05 1 4 W ww 15 046 ohms 0 05 1 4 W ww 25 ohms 0 05 1 4 W rotary 3 sections Assembly board ac input includes C301 thru C307 C var fxd Var vdcw folds C var R301 thru R303 cer 2 to 8 pF 0 01 LF 10 cer disc 5 5 to 18 pF NPO 300 0 027 pF 10 cer die 9 to 35 pF Scans by ArtekMedia 2008 07115 07115 07115 07115 07115 00213 01121 07115 07115 hp 07115 07115 07115 hp 07115 07115 hp 56289 00853 00853 75042 75042 75042 15042 15042 hp hp hp hp hp hp 56289 hp 56289 hp C20 obd C20 obd C20 obd C20 oba C20 obd 15005 obd 4705 C20 obd C20 obd 2100 1415 C20 obd C32 obd C20 2100 1415 C20 obd C20 obd 00467 61901 5C13 obd 15 910 RCM15E470J 0 obd CEP T 0 obd CEB T 0 obd CEB T 0 obd T 0 obd 0812 0090 0812 0089 0812 0088 0812 0087 3100 0806 00467 66503 0121 0060 192P10392 0121 0061 192P21392 0121 0046 6 5 Section VI Scans by ArtekMedia 2008 Model 467A Table 6 1 Replaceable Parts Cont d si k E REFERENCE sr TQ DESCRIPTION MFR MFR PART NO DESIGNATOR PART NO niic 4 A3C306 0140 0202 1 fxd dipped mica 15 pF 5 00853 RDMI5CI150J5C A3C307 0170 0019 C fxd 0 1 LF 5 56289 192P10452 A3R301 0727
12. 82125 83148 83185 83298 83315 83374 83330 03532 83385 83591 83594 83740 8372 83821 83942 84171 84396 64411 84970 85454 E5471 85474 81660 85911 86174 86197 88679 CODE LIST OF MANUFACTURERS Continued Manufacturer Address Dafsance Dhio Monrovia Catil Mors Boslon Mess Dayloo Ohlo Orange Conn All Slar Pcodacts inc Avety Label Cn Hemmerload Co Inc Stevees Co Inc Dimco Gray Ca Insttumeoto lon Grayhill LaGrange I Trrad Transformer Corp Vealce Cetif Winchoslor Elne Div Lilles Ind lac Dehville Conn Milltety Spacilication AL dije loleroatsonai El Segundo Altoex Electronics Inc Cambridge Merylacd Controls Div Bacy Wright Corp Watertown Mase Cartes Precision Electric Co Skokie 111 Serli Faraday Inc Coppa Hew 111 Eluclric Div Hobokon Eleciric Regolales Corp Norwalk Oonn Jeffers Etectrorits Olvision of Spaer Carbon Co Dv Bois Pe Fairchild Camar amp Inst Corp Space amp Delense System Olv Paemns N J Magosto bnduslrioa Inc Greenwich Conn Sylvania Electsfo Prod Irc EFectienle Tobe O visico Emperiom Aslron Corp Esas Newath Harrison wilcaciall Inc Chicago 111 Melals amp Coolto s luc Spencer Ploducis Attlohola Mass Joliet Ill Medssoa Wis Woodslock W Y Glendala Callf Phillipa Advanco Control Co N
13. 87473 87664 87330 88140 86220 88698 89231 59473 89045 0030 90179 90870 81146 91260 93345 91416 91506 91637 91662 21737 91827 51886 91929 31961 92180 92367 92607 92702 92966 92332 93369 93410 93532 93929 84117 94142 94144 94148 94154 94197 4222 4330 4375 54537 94696 35023 95236 35233 95263 95255 99275 95248 95154 Manufacturer Radio Corp of America Electroatc Comp amp Devices Div Seastiam Mfg Ca Glondalo Calil Matca Indostiroa Anahosm Calll Phtttn Corposation Lansdsle Division Lansdale Pa Westera Fibrous Glass Products Co Seo Francieco Calil Sap Ftancisco Caltl Providnnce R Harrison N J Ve Walers amp Robers Inc Tower Mig Cotler Hammor Inc Lingala Ill Gould Nafianal Botfores Inc St Paul Mina Mills loc Baffelo N Y Qohleod Cellf Glaybar Electric Co Scnenectady E Olstiibyling Corp Uoiled 7 iarsfotmar Cn Chicago 111 United Shoe Machinery Carp Beverly Mass US Rifbbat Ca Consome Ind 5 Piasties Prod 21 Pesselc N J Bearing Engineering Co Son Franciscn Celil ITT Cannon Elect nc Salem Div Salem Mass Connor Spilng Mfg Co Sas Francisco Calll Millar Dial amp Namaptato El Mante Calif Radto Matenals Co Chicago A pia Ise Attleboro Mess Dale Elnctronics lac Columbus Nabr Elea Corp Willow Cove Wakelloid Mass Redw
14. Code No 10000 00135 00213 09257 99331 00348 00373 00656 10774 00781 00818 00853 00866 00891 00023 01002 01009 01121 01255 01281 01295 01349 01589 01670 01930 01961 02114 01116 02286 02660 02735 07771 02777 02825 03504 03705 03797 03318 03877 03889 03354 01003 04013 04062 04222 04154 04404 94651 04673 04713 04732 04773 04796 04811 04870 04319 03006 CODE LIST OF MANUFACTURERS The following code numbers are frem the Fedefu Supply Code for Manufacturers Cataloging Haidbooks H4 1 Name Code and H4 2 Code to Name and ther jatest Supplements The date of revision and the date of the supplements used appear at the bottom of each page Alphabetical codes have been arbitrarily assigned to suppliers not appearing in the 4 Handbook Menuiceturer Address U S A Common Any 5 McCoy Earle nics Moont Springs Sage Electronics Cora Rochester N Y Coco Inc Bamelson Coan Huuidini Callan Calif Mitrolion Cos Inc Valley Stream Y Garto s Int Ae ovox Corp Chery N J New Bedicrd toss Amp Inc Hersasbulg Pa Aiscoall Radio Coro Boonton Norltern Engineering Laboratones Inc Borlinglon Wis Sargamo Evecfelc Co Pickens 01 Pickans 5 City of Industty Holmes Los Angolas Calil Microijab Inc Livingston General Co Copocilor De
15. E xe ASE er 4 6 1 8 5515 90 AOS Fe llWl1 531035 531835 G2182 i 30 1 09 2 AOS I I VLIF TOPON uonoas E Sa vas __ ve 8002 eIP WY MY Aq Model 467A PERFORMANCE CHECK TEST CARD Hewlett Packard Model 467A Power Amplifler Supply Serial No DESCRIPTION i DC Gain Cheek 2 Accuracy and Gain Check 100 kHz Test Performed by Date CHECK TEST LIMITS 9 97 10 03 V 4 985 V to 5 015 V 1 994 V to 2 006 V 0 997 to 1 003 V 0 V to 10 V TEST LIMITS X10 5 9 900 V to 4 950 Vto 1 980 V to 10 100 V 5 050 V 2 020 V 3 Distortion Check 1 kHz 100 kHz 1 MHz oltage and Current Check V CCW V CW V CW V CCW V CCW V CW CW V CCW V CCW 20 V CW 9 Lead Regulation Check No load 2 load 0 990 V to 1 010 V greater than 10 V 9 970 to 10 030 V 4 985to 5 015V 1 994 to 2 006V 0 997 to 1 003V greater than 10 V 9 970 to 10 030 V 4 985 to 5 015 V 1 994to 2 006V 0 997 to 1 003V greater than 10 V 9 00 V to 11 00 4 50 V to 5 50 1 80 V to 2 20 0 90 Vte 1 10 greater than 10 V lt lt lt lt SPECIFICATION add lt 0 01 80 dB down add lt 1 40 dB down less than 0 3 V SPECIFICATION gt 20 00 gt 20 00 SPECIFICATION 41 000 V within 10 mV of no load Scans by ArtekMedia O 2008 INDICATION INDICATION INDICATION I
16. ae OTS 4675 3 06296 zy D 9 Figure 5 7 High Frequency Compensation Adjustment Section V Model 467A Table 5 6 Troubleshooting Front Panel Symptoms FRONT PANEL SYMPTOMS POSSIBLE CAUSE Line not glowme 1 Power ON Check fuse Fi indus properly as power supply but not Check QI01 as amplifier Functions properly as amplifier but not as Check QI08 Q109 and Q110 power Supply Functions properly as Tm in all ranges except Check R301 C301 C302 and C202 Check R362 C303 C309 and C203 C306 and C307 Check R303 C305 Check R201 Functions properly as power in all ranges ERCON 1 a aS power supply in ali ranges except 1 and 2 Check R207 Functions properly as power supply in all Check R207 and R208 ranges except 1 2 andi4 Check R206 thru R209 Functions properly as power supply only Check for shorted C115 in 20 Power supply ust is 24 V of SUPPLY or VOLTS ADJ setting damaging mounted components The assembly hp part number is silk screened on the exterior of the circuit board to identify it Refer to Section VI for parts replacementand part number information circuit and boardtoseparate or cause damage to the component c Component lead holeshould be cleanedbefore inserting new lead 9 40 The etched circuit boards are a plated through type The
17. Edison Indusines OW of McGraw EGmos Co Wesi Orange J 19589 Coocoa Galdwis Fark Calit 19544 LRC EiPctionics Horsoho2 s N Y 19701 Electra Mfg Co ndepandenca Kansas 20182 Atronics Corp Philsdalphia 21226 Exocutona Inc Longlsland N Y 21335 Bearing Co The Naw Britain Conn 21520 Fanstaal Metalluigical Corp Chfcago 111 23042 Tezscan Corp 106 1 1 Ind 23283 Blilish Radie 100165 Lid Washington D C 04455 G E Lamp Division Nele Park Cleveland 24655 Generai Radio Co Yesi Coocord Wass 24681 Memeo lac Comp Div Ind 24796 Parelco Inc San Jusn Capislra no Catit 26155 Gres Recroaucer Corp Rochelle N Y 26452 Grobal Fite Co of America Inc Carlstadt N J 26951 Comopae Hollister Co Hollister Calf 26992 Hamilton Walch Lancaster 2725 Specie litias Mfg Co Inc tiatlord Conn 28480 Hewlotl Pockard Co Palo Alto Calif 28920 Heyman Co Keoilworth N J 3081 Sesttument Speceaiins Faits N J 33173 Receiving Tube Dept e shoto 35434 Lectiohe inc Cnh c3go 111 36196 Slaawyck Cot Piodocls Ltd Hawkesbury Ontario Canada 36287 Cunningham W H amp Hill Ltd Tosoni Ontario Canada 37942 Mallory Sno indienapol 15 Ine 39543 Mechanical Induslises Piod Co Aktnn 0710 40920 Uioraluco Precision Inc Keane N H 42190 Muter
18. than 10 00 Note and record reading d Connect variable voltage line transformer between Model 467 Apower plug and linepower Source e Adjust line transformer for 126 5 V output DC Voltmeter reading should remain within 10 mV of reading obtained in c above f Reset line transfornier for 103 5 V output DC Voltmeter reading should remain within 10 mV of reading obtained in c above 3 16 OUTPUT IMPEDANCE CHECK a Figure 5 4 describes the test arrangement recommended AnAC Voltmeter hp Model 33IA a Test Oscillator hp Model 651B and a 12 ohm 1 1 2 watt resistor hp Part No 0811 0297 will be required b Connectthe Model 467A as shown in Figure 5 4 c Short Model 467A front panel INPUT set to AMPLIFIER X10 d Adjust oscillator for 1 0 V rms 500 KHz output Verify output using AC Voltmeter e Voltage across 12 ohm resistor should 8 V or greater At 500 KHz Model 467A output impedance is 3 ohms or less where F12 ohms 467 9 17 CAPACITIVE LOAD CHECK a An Oscilloscope hp Model 175A and 0 01 uF 10 200 V capacitor hp Part No 0160 0304 will be required for this test b Set Model 467A to SUPPLY 20 VOLTS ADJ fully CW Model 3440A 3444A DC Voltmeter Reading minimum designated 1 000 to 1 000 v VOLTS VOLTS 2 000 to 2 000 V VOLTS 4 000 to 4 000 V VOLTS 10 00 to 10 00 gt VOLTS 20 00 to 20 00 V 2 Scans by ArtekMed
19. 0858 1 fxd flm 3 48 M ohms 21 1 2 W 00001 CD1 2MR obd A3R302 069 0071 1 fxd fim 1 58 ohms 21 94450 CVC obd A3R303 0757 0787 fxd met fim 392 ohms 1 1 4 W 75042 0 A4 00467 66502 1 Assembly beard output amplifier in hp 00467 66 502 cludes C401 thru C403 R401 thru R411 4 401 0180 0136 2 C fxd Alelect 10 uF 10 100 56289 40D193A2 4 402 50 vdcw 4 403 0150 0012 2 fxd disc 10 000 pF 220 71590 13C Disc obd 1000 vdew A4R401 0758 0080 1 fxd metal oxide flm 75 ohms 5 07115 C20 obd 1 2W A4R402 0758 0025 1 fxd metal oxide flm 160 ohms 5 07115 C20 obd 1 2 W A4R403 thru 0699 0006 4 fxd comp 4 7 ohms 109 1 W 01121 GB47G1 A4R405 AAR406 0758 0083 R fxd metal exide flm 68 ohms 5 09115 C20 obd 1 2 W A4R407 0758 0024 fxd metal oxide flm 100 ohms 55 07115 C20 obd 1 2 W A4R408 0699 0001 2 fxd comp 2 7 ohms 210 1 2 W 01121 EB27G1 A4R409 A4R410 0699 0006 fxd comp 4 7 410 1 W 01121 CB47G1 A4R411 0758 0006 fxd metal oxide flm 10 ohms 5 07115 C20 obd 1 2 W Cl 0150 0089 1 C fxd cer die 4 7 pF 0 25 pF 500 12982 301 011 0 479 vdcw CAC 3 0180 0359 2 fxd 1 elect 1000 10 75 56289 D38530 75 vdcw C4 5 0150 0121 fxd cer die 0 1 pF 80 20 50 56289 5 50 vdcw C6 0150 0012 C fxd disc cer die 10 000
20. 2008 2 1 Model 467A SECTION INSTRUCTIONS OPERATING 3 1 GENERAL 3 2 The Model 467A Power Amplifier Supply canbe operated as a power amplifier or a power Supply Controls on the front panel provide 1 selection of either operating mode and 2 selection of fixed or variable amplifier gain and pewer supply ranges 3 3 DESCRIPTION OF CONTROLS 3 4 Figure 3 1 gives the description and function of the 467A controls indicators and connectors 3 5 OPERATING INSTRUCTIONS 3 6 Whenoperatedasa power amplifier non invert ing the Model 467A has four calibrated gain factors AMPLIFIER 1 X2 5 and X10 and providesa maximum output power of 10 watts peak for input fre quencies between dc and 1 MHz Accuracy of 0 3 from dc to 10 kHzis obtained when operating into a load of 400hms or greater As apower supply regu lated the instrument can be operated in five ranges of plus or minus output voltages SUPPLY 1 2 4 10 and 20 The amplifier gain or the dc output canbe varied with the VAR GAIN VOLTS ADJ control The inputandoutput terminals aredc isolated from earth ground Connection of a grounding strap between the power line ground 4 and j terminals references both the INPUTand OUTPUT 73 terminals to earth ground 3 7 AMPLIFIER OPERATING INSTRUCTIONS a Set the AMPLIFIER SUPPLY control to the AMPLIFIER position selecting the desired gain setting VAR X1 X2 X5 or X10 b Set the
21. 6 Delete Capacitor Scans by ArtekMedia 2008 MANUAL CHANGES MODE L 467A POWER AMPLIFIER SUPPLY hp Part No 00467 90003 New or revised item Instrument Serial Number Make Manual Changes Instrument Serial Number Make Manual Changes 49 02141 1 p49 02248 and above 1 2 994 02386 and above 1 2 3 CHANGE 1 Page 5 13 5 14 Figure 5 14 Change C7 C8 to 005 uF Page 6 6 Table 6 1 Change C7 C8 Part No to 0160 3333 5000 pF Change F1 Part No to 2110 0336 Page 6 7 Table 6 1 Change Jo Part No to 1251 2357 Change 2 Part No to 3101 1234 Change W1 Part No to 8120 1348 Page 6 8 Table 6 1 Change rear panel Part No to 00467 00203 Page 3 3 Figure 3 2 Revise rear panel drawing as follows Ww LINE A gt 1948 440 4674 86 0001 14 October 1971 Supplement for 00467 90003 Manual Changes MODE L 467A Page 2 CHANGE 2 Page 6 2 Change AlCR114 Part No and description to 1901 0050 Diode Si 200 ma p gt CHANGE 3 On the following pages and figures the ground symbols will be changed as shown unless otherwise noted a is changed to 4 is changed to o j on the printed circuit boards is changed to Front cover Page 1 0 Figures 3 1 4 1 5 13 Figure 5 14 do not change earth ground from center terminal of J5 ERRATA On Performance Check Test Card Following pa
22. Connector 12 ribbon type contacts hp 1251 0473 J8 J9 1250 0118 2 Connector series bulkhead recep 91737 8427 tacle K1 0490 0147 1 Relay coil resistance 900 ehms 75 hp 0490 0147 ohms min L1 12 9140 0136 2 Coil fxd RF 22 uH 10 hp 9140 0136 L3 9140 0106 1 Coil fxd 0 47 uH 420 hp 9140 0106 Q1 thru 04 1854 0037 4 TSTR NPN Si hp 1854 0037 Q5 thru Q8 1850 0098 4 TSTR PNP Ge hp 1850 0098 R1 0684 3331 1 fxd comp 33 ohms 310 1 4 W 01121 c B3331 R2 R3 0811 0940 2 fxd ww 60 ohms 3 50 W hp 0811 0940 R4 2100 0352 1 var 5 K 50 ohms 5 2 W hp 2100 0352 R5 2100 0993 1 R var ww 10 Kohms 410 5 hp 2100 0993 R6 0758 0024 fxd metal oxide flm 100 ohms 35 07115 C20 obd 1 2 W R7 0727 0018 1 fxd carb flm 40 ohms 1 1 2 V 0000T CD1 2PR obd S1 3101 0036 1 Switch toggie SPST 3amp 250 vac de 3101 0036 S2 3101 0033 1 Switch slide DPDT non shorting 0 5 hp 3101 0033 amp 125 vdc 3 amp 125 vac 115 230 V T1 9100 0307 1 Transformer power hp 9100 0307 W1 8120 0078 1 Assembly cable power smooth black hp 8120 0078 extra limp 7 5 ft lg set XFl 1400 0084 1 Holder fuse extractor post type for hp 1400 0084 single 3 AG cartridge fuse MISCE LLANEOUS 9040 0235 1 Base lampholder hp 9040 0235 00467 01201 1 Bracket heat sink hp 00467 01201 00467 01202 1 Bracket rear hp 00467 01202 1410 0052 1 Bushing pot 0 435 OD by 0 43
23. Model 3440A 3445A AC Voltmeter Reading Frequenc Output Amplifier Adjusted Dial Range Attenuator for 3445A Reading of Per Output of 467A 1 X100 K 1 000 V X10 9 900 to 10 100 V X5 4 950 to 5 050 V X2 1 980 to 2 020 V X1 0 990to 1 010V VAR CW greater than 10 V 1 X10 K 3 X10 9 970 to 10 030 V x5 4 985 to 5 015V X2 1 994to 2 006V 1 0 997 1 003 VAR CW greater than 10 V 4 X100 3 X10 9 970 to 10 030 V 5 4 985 to 5 015 X2 1 994 to 2 006V X1 0 997 to 1 003V VAR CW greater than 10 V 1 X1M 3 X10 9 00 to 11 00 V 5 4 50 to 5 50 V 2 1 80 to 2 20 1 0 90 to 1 10 V VAR CW greater than 10 V read on 331A Voltmeter NOTE At 10 kHz and 400 Hs allow for possible error of 3445A of up to 0 1 TEST OSCILL ATOR hp65i8 hp 467A POWER AMPLIFIER AC VOLTMETER hp 331A 467 02048 Figure 5 2 Output Capabillty Check Scans by ArtekMedia 2008 Model 467A 427 4 9 26234 FILTER SET WHITE 2645 WHITE 2645 00K TEST OSCILLATOR Scans by ArtekMedia 2008 hp467A POWER AMPLIFIER Section V DISTORTION ANALYZER hp 331A 42771 95 gp a 29 95 Figure 5 3A Distortion Check Lab Mode12645 1 KHz a 100 KHz Bandpass e Rotate FUNCTION switch to DISTORTION Filter White Instrument LabModei2645 100 Null out fundamental signal by alternately KHz 40and 600 ohm load resistors and the reducing the
24. POWER AMPLIFIER SUPPLY SERIALS PREFIXED P O Box 301 Loveland Colorado 80537 U S A 444 Copyright Hewlett Packard Company 1965 Scans by ArtekMedia 2008 Printed AUG 1969 Scans by ArtekMedia 2008 Model 467A Table of Contents List of Tables and Illustrations TABLE OF CONTENTS Section Page Section Page I GENERAL INFORMATION 1 1 MAINTENANCE 5 1 PT Be setip e 55 45 5 5 sy 25 dela JetBeHuclon sx wa jr raa e 9 1 1 3 Output Capability 1 1 5 3 Test Equipment Required 5 1 0 5 Power 1 1 5 5 Performance Checks 5 1 1 7 Instrument Identification 1 1 9 1 Power Amplifier Operations 9 1 BC Power Supply Operation 5 4 Section Page 5 16 Output Impedauce Check 5 4 INSDALGATION eer ses pee 2 1 5 17 Capacitive Load Check 5 4 1 Inspection ak nee 2 1 5 18 Ripple and Noise Check 5 5 2 3 Installation Sk 2 1 5 19 Current Limit Check 9 5 2 5 Power Requirements 2 1 9 20 Power Supply Voltage Checks 5 5 2 7 Three Conductor Power Cable 2 1 5 21 Adjustment and Calibration 2 9 Repackaging for Shipment 2 1 Procedures FF 9 23 Zeng Adjusl 9 6 section Page 9 24 Current Limit Adjustment 5 6 OPERATING INSTRUCTIONS 3 1 oh DC Gain Adjustment R147 5 6 lt Pen Le owe x te RENE 3 1 5 28 Balance
25. electrical connection between sides of the d To replace components shape new leads and board is made by a layer of metal plated through the facet them i hdles Reheat wb aid component holes When working on these beards addsolder as required to insure a good elec observe the following general rules FEA co HEEB a Use a low heat 25 to 50 watt small tip soldering iron and a small diameter rosin di flux fromthe dme br adjoining area b Circuit components be removed byplacing f To avoid surface contamination of the printed the soldering iron on the component lead on either side of the boards and pulling up on lead If a component is obviously damaged clip leads as close to component as possible and then remove Excess heat can cause the circuit clean with weak solution of warm water and mild detergent after repair Rinse thoroughly withclean water When completely dry spray lightly with Krylon 1302 or equi valent Scans by ArtekMedia 2008 Model 467A Scans by ArtekMedia 2008 TRUE STAGES TRUE TAUE Section V FALSE TRUE TRUE Figure 5 8 Troubleshooting Tree Tabie 5 7 Power Supply Checks Conditions SUPPLY 20 VOLTS ADJ fully CW 2 Measure dc output voltage Should be 3 approximately 20 00 Vdc to 2 If not proceed Measure dc power supply voltages as outlined in P
26. mesn qusre 1 4 neon roi rotary value shown part may ba emitted NC oormally opon NPO negativo positive zero Se gele ndum nostandard type mm vero tempe reture co sect section s ber pesigned selected efficient Si BYicon or Specia type Dupont de Nemara Scans by ArtekMedia 2008 Scans by ArtekMedia 2008 Section VI Model 467A Table 6 1 Replaceable Parts REFERENCE hp DESIGNATOR PART NO TQ DESCRIPTION MFR MFR PART NO Al 00467 66501 1 Assembly board amp and power supply hp 00467 66501 includes C101 thru C129 9101 thru 0112 CR10I thru CRi47 R101 thru R165 L101 thru L103 A1C101 0170 0019 2 fxd 0 1 LF 5 56289 192P10452 A1C102 0150 0060 1 fxd cer die 1 section 5 6 pF 0 25 12982 301 011 0 569 pF 500 vdcw A1C103 0160 0127 5 fxd cer die 1 0 2F 20 25 vdcw 56289 5C13 1 104 0150 0121 4 fxd cer die 0 1 4 F 80 20 50 vdew 56289 5C50A A1C105 0160 0182 2 fxd dipped mica 47 pF 45 00853 RDMIS5SE47013S 1 106 0140 0198 1 fxd dipped mica 200 pF 5 00853 RDM15F20133C A1C107 0160 0127 fxd cer die 1 04 F 20 25 56289 5C13 A1C108 A1C109 0160 0182 C fxd dipped mica 47 pF 5 00853 RDM15E470J3S A1C110 0180 0306 1 fxd Al elect 300 uF 10 100 15 56289 34D307HO15FJ4 vdcw 1 111 0180 0110 1 fxd Al elect 80 L F 75 vdcw 96289 type 41D D331
27. meter range and adjusting resistors and capacitors listed in Table 5 3 BALANCE and frequency control knob for a wul be required for this test null Record the amount of distortion Table 5 3 Parts for Figure 5 3B f Disconnect the filter output from the 331A Se erac em Connect the filter output to the 467A input DSIRE che Part an nin Connect the 467A output to the 331A input Rl 0690 8231 R fxd 82 0002 1 W acrossa40 ohm load as shown in Figure 5 3A R2 0092 5125 R fxd 51009 2 W Set the 467A to X10 position R3 2100 0006 R var 50002 2 W Cl 0121 0021 C var 5 5 pF to 64 3 pF g Set the Distortion Analyzer FUNCTION to GZ C3 0160 0439 fxd 22 pF SET LEVEL and adjust VERNIER for a full C4 C5 0160 0474 fxd 390 pF scale reading of 1 100 L1 9140 0007 Inductor var 60 1005 h Rotate the FUNCTION switch to DISTORTION b Connect the 1 KHz filter input to the output of and find the null again The new reading the 651B Test Oscillator using a 600 ohm should add less than 0 01 80 dB down load Connect the 331A Distertion Analyzer 2 i Repeat steps bthrough h using the 100 KHz ne Pag Bert phd a Me n Pas filter and 100 KHz frequency settings on the 651B and the 331A Distortion added by the c Set the oscillator frequencyto 1 KHz Adjust 467A at 100 KHz should be less than 1 40 the output amplitude for the 1 0 volt output dB down Set the Distortion Analyzer Frequency to 1
28. misc electronic part silver Al aluminum A z10pere Gold capacitor cor ceramic coel coellicleot com common comp composition conn connection dep deposited double poledouble Uwow OPST double pale single throw elect electrolytic encap encapsulated farad 6 FET field effecl transistor fixed GaAs um areenjde GHz pigahere 1079 hort ed guard ed Ge gormanium gra ground ed henry Jes lig mercury Hz herts cycle 3 per second uw 6 3 Miscellaneous parts are listed at the end of Table 6 1 6 4 ORDERING INFORMATION 6 5 To obtain replacement parts address order or inquiry to your local Hewlett Packard Field Office See Appendix B for list of office locations Identify parts by their Hewlett Packard part numbers include instrument model and serial numbers 6 6 NON LISTED PARTS 6 7 To obtain a part that is not listed include a instrument model number b Instrument serial number c Description of the part d Function and location of the part DESIGNATORS n fuse MP mechasicul part EC thermecoupte FL plug myacuummbe neon HA beater transietor imlb photocell etc 1C integrated circuit QCR transigtar diode cable J jack R resistor X SOCleelL K 2 relay RT thermistor XDS lamphelder L Inductor 5 6 gt itch fuacholder
29. pF 20 71590 13 C Bisc obd 1000 vdcw C7 C8 0160 0195 2 fxd 1000 pF 220 250 vacw 71590 ebd C9 0140 0149 1 fxd mica die 470pF 25 300 vdew 00853 B15F471J 051 2140 0015 1 Lamp glow high brightness neon 2 hp 2140 0015 bub T 2 F1 2110 0020 1 Fuse cartridge 0 8 amp glass body 71400 MDL8 10 slow blow J1 1251 0135 1 Connector P C 15 tuning fork type 000 SD 615 UR contacts 19 1251 0141 1 Connector 18 tuning fork type 00 50 618 UR contacts J3 1510 0008 2 Binding post red without solder turrel hp 1510 0008 brass 1510 0009 2 Binding post black without solder turret hp 1510 0009 brass 0340 0099 5 Insulator atti rotation boss outer hp 0340 0099 0340 0100 4 Insulator binding post grey plastic inner hp 0340 0100 14 1510 0008 Binding post red without solder turret hp 1510 0008 brass 9060 0625 Assembly connector hp 9060 0625 1510 0009 Binding post black without solder turret hp 1510 0009 brass 6 6 Model 467A Section Vl Scans by ArtekMedia 2008 Table 6 1 Replaceable Parts Cont d REFERENCE hp u oR _ DESIGNATOR PART No TQ DESCRIPTION MFR MPR PART NO 14 Cont d 0340 0099 Insulator anti rotation boss outer hp 0340 0099 0340 0100 Insulator binding post grey plastic inner hp 0340 0100 JS 1251 0148 1 Connector pwr receptacle 3 pin male hp 1253 0148 J6 Not ass ined J7 1251 0473 1
30. read 10 00 volts 1 0 If the reading is not within toler ance see Paragraph 5 30 for adjustment AC VOLTMETER hp 34 40A 3445A Figure 5 1 AC Accuracy and Gain Check 9 1 Section V Repeat steps b through d for each of the os cillator settings and Amplifier settings listed in Table 5 2 For each measurement con nect the ac voltmeter first to the INPUT of the 467A and adjust for 1 009 Then con nect the ac voltmeter to the OUTPUT of the 467A The reading should be between the limits listed in the last column If not see adjustment procedures Paragraphs 5 28 through 5 30 For 1 MHz output frequency use 331A AC Voltmeter 9 10 OUTPUT CAPABILITY CHECK a A Test Osciliator hp Model 651B an AC Voltmeter hp Model 331A and 40 ohm and 600 ohm load resistors will be required Model 467A Connect the Model 467 shown in Figure 5 2 Set ac voitmeter RANGE to 30 Set Model 467A to AMPLIFIER X10 Set test oscillator frequency to 400 Hz Ad justosciliator output amplitude fo provide ac voltmeter reading of 14 14 Vrms 20 V Current through 40ehm resistor will then be 0 3535 amps 0 5 A peak 9 11 DISTORTION CHECK Figure 5 3A describes the test arrangement recommended A Distortion Analyzer hp Model 331A an Oscillator hp Model 651B a 1 KHz Bandpass Filter White Instrument Table 5 2 AC Calibration and Gain Check 651B Osciliator
31. 010 0758 0026 0758 0010 0758 0005 Table 6 1 Replaceable Parts Cont d DESCRIPTION Diode Si 50 mA at 1 V 100 piv 12 pF Diode breakdown 6 81 V 45 400 mW 1 Diode breakdown Si 33 2 V 5 400 mW 8 Diode Si 200 piv 0 5 amp Diode Si 90 mA at 1 V 100 piv 12 pF 2 Diode breakdown Si 33 2 V 2 400 mW glass Diode Si 200 piv 0 5 amp Diode 51 50 mA at 1 V 100 piv 12 pF Diode breakdown Si 33 2 V 5 400 mW Diode 50 mA at 1 V 100 piv 12 pF 2 Diode breakdown 8 25 V 1 Connector female 1 Connector male 2 Coil fxd RF 10004 H 5 dc current rating 135 mA 1 Coli fxd RF 1 10 3 TSTR NPN Si 2 TSTR NPN Si NPN Si TSIR NPN Si 2 TSTR PNP Si type 2N2904A 1 TSTR NPN Si TSTR PNP 1 type 2N2904A 2 TSTR matched pair two 1854 0023 transistors with VBE matched TSTR NPN Si 2 TSTR NPN Si EIA type 2N3053 1 fxd carb flm 2000 ohms 5 1 2 W 2 fxd met fim 392 K ohms 1 1 4 W 4 R fxd metal oxide fim 3900 ohms 5 1 2 W 3 fxd metal oxide flm 10 ohms 45 1 2 W 2 fxd met flm 2 05 ohms 1 2 1 4 W 1 R fxd comp 2000 ohms 5 1 4 W Not assigned 1 R fxd metal oxide flm 150 ohms 5 1 2 W 2 R fxd metal oxide flm 3300 ohms 5 1 2 W 1 R fxd met fim 82 ohms 5 1 2 W R fxd metal oxide fim 3300 ohms 5 1 2 W 3 R fxd metai oxide flm 4700 ohms 5 1 2 W Scans by ArtekMed
32. 100 KHz to 1 MHz Performance Checks hp Model 331A Dlstor AC Voltmeter Range 0 001 to 30 V Calibration tion Analyzer Accuracy 5 Variable Line Output 103 5 V to 127 5 V Performance Checks Superior Electric Model Transformer UCIM Distortion Frequency 100 KHz Performance Checks hp Model 331A Distor Analyzer Range 0 01 to 100 tion Analyzer Accuracy 3 DC Standard Output 1 0 V Performance Checks hp Model 741B DC Accuracy 0 05 Calibration Standard DC Milliam Range 1000 mA Performance Checks Model 428B DC meter clip en Accuracy 3 Calibration Milliammeter Oscilioscope Frequency to 15 MHz Berformance Checks ko dim HIER SR Capacitor 0 001 F 10 200 V Performance Checks hp Part 0160 0304 Resistor 40 ohms 5 10 watts Performance Checks Part 0815 0028 2 ohms 1 1 2 watt Performance Checks hp Part No 0727 0445 Se 12 ohms 1 1 2 watt Performance Checks hp Part No 0811 0297 600 ohms 1 1 2 watt Performance Checks hp Part No 0727 0081 Calibration Filter Bandpass 1 KHz Distortion Check White Instrument Lab Bandwidth 50 2645 1K Filter Bandpass 100 KHz Distortion Check White Instrument Lab Bandwidth 50 2645 100K 5 0 Scans by ArtekMedia 2008 Scans by ArtekMedia 2008 Model 467A Section V SECTION V MAINTENANCE 5 1 INTRODUCTION c Connect the DC Standard output to the Model 5 2 This section
33. 1000 Chicago Ifl Onw Corp Midi and Mich Efeclro Motive Mfg Cn inc Willimentic Coon Dialight Corp Brooklyn Indiana Gonesal Corp Electronics div Keasby J General Instrument Corp Cep Div Newark N J Otoke Mig Co Harwood Heighis 111 Hugh M Eby iuc P hilade phia Pa Gudeman Co Chicago Etoslic Stop Net Corp N J Robert Hadley Co Los begefes Cali Techaologicai Poduets fre Henson Mte Co Inc Mater Co Helipol Div al Beckman inol Inc Falfedan Calit Hoghes Piodecis Divislon of Hughes Alicrali Co Boach Cali Ampnrea Elect Co Hichs ville Bradley Semiconducla Carp NewHaven Coco Carling Electric loc Hartlosd Cons Circle wig Treatoa J George Co Div MSL ladusizees Inc Ph adeiphia Federal ciow Pradocts Inc Chicago I Fischarc SpecratMfg Co Cincinosl Ohid 03 118 Co Tha Elyria Ohio Geshen StamBing amp Co lod Pna eloc Ind Chicago Ill Eno Code 3393 73805 7395 76276 14455 7486 14868 14970 15042 15263 75378 7514 75816 75915 16005 15210 1603 76487 76493 76530 75545 76703 26854 706 77075 17221 77232 7134 17630 77638 11164 11983 76189 18277 8281 78290 78424 78452 7847 18488 78483 10553 70730 70347 79136 79142 79251 79727 79963 86031 801
34. 1901 0160 0127 0160 0335 0140 0039 0698 3143 0698 3144 0757 0748 0698 3144 0757 0746 0812 0090 0812 0089 0812 0088 0812 0087 3100 0806 00467 66503 0121 0060 0160 0161 0121 0061 0170 0066 0121 0046 R fxd 1 2W R fxd 1 2 W R fxd 1 2 W R fxd 1 2 W R fxd 1 2W R fxd R fxd R fxd 1 2 W R fxd 1 2W R var metal oxide flm 910 ohms 5 metal oxide flm 3900 ohms 59 metal oxide flm 1200 ohms 5 metal oxide flm 1600 ohms 459 metal oxide flm 3000 ohms 35 ww 100 ohms 3 5 W comp 47 ohms 5 1 2 W metal oxide flm 22 ohms 25 metal oxide flm 220 ohms 4596 lin taper ww single section 1 ohm 4109 2 W R fxd 1 2 W fxd 1W R fxd 1 2 W R var metal oxide flm 5100 ohms 5 metal oxide fim 910 ohms 5 metal oxide flm 68 ohms 2595 lintaper ww single section 1 ohm 10 2 W R fxd 1 2W R fxd 1 2 W metal oxide flm 2 7 ohms 5 metal oxide flm 4700 ohms 45 Assembly switch amp and supply in cludes C201 tbru C203 201 R201 thru R209 fxd Ixd fxd fxd fxd fxd fxd fxd fxd fxd fxd fxd PPO Swatch cer die 1 0 uF 20 25 vdcw dipped mica 91 pF 1 molded mica 47 pF 35 met flm 52 3 ohms 41 1 4 W met fim 8 87 ohms 41 1 4 W met fim 4 75 ohms 1 1 4 W met fim 8 87 ohms 1 1 4 W met fim 4 75 ohms 1
35. 20 80131 80207 60223 80248 80294 80411 From Monufocturer Address Esoctmorcs Corp jeming 5 Radio Mfg Coup Gr ov Pinr Corp Signadte Inc 8 00 lt 1 0 San 1256 Calif Ridgelield N J Neptune N J J N Wits aed 5905 Winchester Masa tadustriat Conden Corp Chicago 111 Products Divisionol Amphenol Gorg Eloctanics Corp Danbyry Conn E F Johnson Ca Wesece Mjnn lateenalional Resisionce Co Phitadeiphia Keystooe Caiboo Ce Inc St Marys Ps CTS Kn ghls inc Sandwich 111 Kulka Flecinc Corparalian Veinos N Y Lear EtecInc Mig Co Chicago Littieloso Inc DesP ames 116 Lord ig Co Ene Pa C W Marwade Son Fraocrsco Calif Gmotial lostsoment Colp Micamold Divisibo Newark N J James Millen Mfg Co Inc taljon Unss 1 4 Millar Los Angeles Calll Cinch Monadnock Div of United Carr Fastener Corp Leantio Calil Moeller Electiic Co Cleveland Chip Haliopal Uang Neaak NJ Oak Co Crystal Lake 111 The Bendix Corp Electtedyareics Ow Hollywsed Calif Patitic Mnlals Co San Freacisca Phanoslran Instrument aec Electranic Ce Sooth Calif Philedetthia Slag and Wire Corp Phitadelgphia American Machian amp Foondiy Potter 8 Biumfiztd Div Princeton ind TRY Electronic Compcrents Div Carden N J Insiramoal Coro Rectifier Div Beooslyn Re
36. 5 V werking 2 pF 2 ns 200 hp 1901 0050 1 V 1 108 lhru 1901 0025 Diode Si 50 mA at 1 V 100piv 12 pF hp 1901 0025 ALGR110 AICRIII thru 1910 0016 3 Diode Ge 100 mAat 0 85 V 60V work hp 1910 0016 AICR113 ing A1CR114 1901 0040 Diade Si 30 mA at 1 V 30 piv 2pF 2ns hp 1901 0040 1 115 1902 0048 Diode breakdown 6 81 V 5 400 mW hp 1902 0048 1 116 1901 0025 Diode Si 50 mA at 1 V 100 piv 12 pF hp 1901 0025 A1CR117 A1CR118 1902 0048 Diede reskdewn 6 81 V 5 400 mW hp 1902 0048 A1CRI119 Nol assigned 6 2 Model 467A REFERENCE A1CR125 thru A1CR128 A1CR129 thru A1CR134 A1CRI135 A1CR136 thru A1CR139 A1CR140 thru AICR142 1 143 1 144 A1CR145 A1CR146 1 147 14101 11 101 A1L102 11 103 10101 10102 A1Q103 A1Q104 A1Q105 A1Q106 A1Q107 A1Q108 10109 10110 10111 10112 A1R101 A1R102 AIR103 A1R104 A1R105 A1R106 ATRIOT7 thru 1 109 A1R110 111 A1R112 A1R113 1 114 DESIGNATOR hp PART NO 1901 0025 1902 0048 1902 0186 1901 0168 1901 0025 1902 3296 1901 0158 1901 0025 1902 3296 1901 0025 1902 3139 1261 0131 1251 0324 9140 0137 9140 0096 1854 0023 1854 0019 1854 0023 1854 0019 1853 0012 1854 0022 1853 0012 5080 9023 1854 0023 1854 0039 0698 0076 0757 0787 0758 0045 0758 0006 0698 0072 0683 2025 0758 0007 0756 0
37. 524 Power Stpply 5 5 9 5 3 Parts for Figure 5 3 ca 5 4 DC Power Supply Operation 5 4 6 1 Replaceable Parts 6 2 LIST OF ILLUSTRATIONS Number Page Number Pare 1 1 Model 467A Power Amplifier Supply 1 0 8 9 Curent lanvit wetk v 5 3 1 Front Panel Controls Indicators and 5 6 Balance Adjust 5 6 A rats JS 5 7 High Frequency Compensatlon Adjustment 5 7 3 2 Rear Panel Controis and Connectors 3 3 5 8 Troubleshooting Tree 9 9 es 4 pros LIEN 5 5 10 4 1 Simplified Block Diagram 4 0 c cece 5 10 5 1 Accuracy and Gain Check 5 1 illu ROMP anew ex otn uxo s Boe 5 10 9 2 Output Capability Check 9 2 5 12 Printed Circuit Board 1 Paris SISAL Dister Hon Check ec d os eee 5 3 LAON 5 11 5 12 5 3B 1 MHz Rejection Filler 5 3 5 13 Schematic Power Amplifier 5 11 5 12 5 4 Output Impedance Check 5 5 5 14 Schematic Power Supply 5 13 5 14 iil Section VAR GAIN AMPLIFIER SUPPLY VOLTS ADJ Model 467A 467A POWER AMPLIFIER HEWLETT PACKARD Figure 1 1 Model 467A Power Amplifier Supply Table 1 1 POWER AMPLIFIER Voltage Gain non inverting Fixed steps X1 X2 X5 X10 Variable 0 10 resolution is better than 0 1 of full output Accuracy 0 3 from dc to 10 kHz wit
38. 8 Ig hp 1410 0052 nickel plated 00467 61601 1 Cable assembly main hp 00467 61601 00467 00101 1 Chassis hp 00461 90101 5000 0714 1 Cover bottom 5x 11 SM hp 5000 0714 5000 0703 2 Cover side 6x 11 SM hp 9000 0703 5060 0712 1 Cover top assembly 5 11 SM hp 5060 0712 5060 0727 2 Foot assembly third mod hp 5060 0727 5060 0703 2 Frame assembly 6x 11 SM hp 5060 0783 00469 21101 1 Heat sink hp 00467 21101 1205 0011 9 Heat sink TSTR hp 1205 0011 1205 0041 1 Heat sink TSTR hp 1205 0041 5040 0700 2 Hinge hp 5040 0700 5040 9425 4 Insulator BNC pane hp 9040 0425 1200 0043 4 Insulator TSTR mtg anodized Al plate hp 1200 0043 0370 0077 1 Knob bar hp 0370 0077 6 7 Scans by ArtekMedia 2008 Section VI Model 467A Table 6 1 Replaceable Parts Cont d REFERENCE hp wi MISCELLANEOUS Cont d 0370 0084 1 Knob round biack 5 8 diam for 1 4 hp 0370 0084 diam shaft 5040 0234 1 Lampholder hp 5040 0234 00467 90003 1 Manual serial prefix 444 hp 00467 90008 00467 00201 1 Panel front hp 00467 00201 00467 00202 1 Panel rear hp 00467 00202 1520 0001 2 Plate mtg bakelite oval shape hp 1620 0001 5020 0700 1 Spacer cab third mod hp 5020 0700 00467 24701 2 Spacer heat sink hp 00467 24701 1490 0031 1 Stans third module tilt stainless steel hp 1490 9031 rod 1200 0080 8 Washer insulating hard gnodized Al hp 1200 0080 ID for 10 32 screw 6 8
39. 91 1 112 thru Not assivned A1C114 A1C115 0150 0091 1 fxd cer die 1 5 pF 0 25 500 vdcw 72982 301 011 0K0 159C A1C116 0140 0176 1 fxd dipped mica 100 pF 2 00853 RDM15F101G3C A1C117 0150 0093 2 fxd 0 01 80 20 100 vdcw 91418 obd A1C118 0150 0058 3 fxd 2 2 pF 1 119 0150 0121 fxd cer die 0 1 4 F 80 20 50 vdcw 56289 5C50A 1 120 Not assigned 1 121 0160 0127 fxd cer die i 0uF 22095 25 vdcw 56289 5C13 1 122 0150 0063 1 fxd cer die 10 pF 0 5 pF 500 12982 301 011 COGO 100 AYC123 0140 0146 1 fxd mica die 82 pF 5 300 vdcw 14655 CDi5F8205 A1C124 0132 0004 1 var trimmer 0 7 to 3 pF terminal 72982 535 009 4R Spacing A1C125 0180 0039 2 fxd elect 100uF 12 vdew 56289 D32697 A1C126 0180 0058 C fxd elect 50 10 100 25 vdcw 56289 28110 1 127 0180 0039 fxd elect 100 tF 12 vdcw 56289 D32697 1 128 0180 0058 fxd elect 50 MF 10 100 25 vdcw 56289 D28110 1 129 0150 0093 C fxd 0 01 uF 80 20 100 vdcw 91418 obd A1CR101 1901 0150 2 Diode Si low leakage low capacilance hp 1901 0150 A1CR102 AiCR103 1901 0040 2 Diode Si 30 mA at 1 V 30piv 2 pF 2ng hp 1901 8040 A1CRI04 1902 0048 5 Diede breakdown 6 81 V 25 400 mW hp 1902 0048 1 105 1901 0025 20 Diode Si 50mAat 1 V 100 piv 12 pF hp 1901 0025 A1CR106 A1CR107 1901 0050 1 goo Si 7
40. Adjust C124 5 6 3 3 Description of Controls 3 1 9 29 High Frequency Compensation 3 5 Operating Instructions 3 1 Adjustment C301 C303 C305 5 7 3 7 Amplifier Operating Instructions 3 1 5 30 Gain Adjustment R148 5 7 3 8 Power Supply OperatingInstructions 3 1 9 31 Troubleshooting Techniques 5 7 9 38 Servicing Etched Circuil Boards section Page IV THEORY OF OPERATION 4 1 Section Page gnc eee CES cess 4 1 Vi REPEAGEABGE PARTS 4 585 xo 6 1 4 5 Block Diagram Description 4 1 4 9 Schematic Diagram Description 4 1 9 1 Introduction 6 1 4 31 High Frequency Amplifier 4 1 4 13 Low Frequency Amplifier 4 1 6 4 Ordering information 6 1 4 15 Differential AmpiiJier 4 1 4 17 Voltage Amplifier 4 2 6 6 Non Listed Parts 6 1 4 19 Driver Amplifier 4 2 4 21 Output 4 2 4 23 External Load Protection 4 2 Appendix 4 25 Power Supply Circuit Description 4 2 4 27 Minus 34 Volt Supply 4 2 A CODE LIST OF MANUFACTURERS 4 29 Plus34 Volt Supply 4 2 4 31 Reference Supply 4 4 2 SALES AND SERVICE OFFICES LiSt OF TABLES Number Page Numver Pare Eds Specificatiow amp Pe KY es gt amp amp 1 0 5 5 Power Supply Voltage Checks 273 5 1 Test Equipment Required 5 0 9 6 Troubleshooting Front Panel Symptoms 5 8 5 2 AC Calibration and Gain Check 5 2
41. ENT 2 10 Thefollowing paragraphs contain a general guide for repackaging of the instrument for shipment Re fer to Paragraph 2 11 if the original container is to be used 2 12 if it is not If you have any questions contact your local hp Sales and Service Office See Appendix B for office locations NOTE If the instrument is to be shipped to Hewlett Packard for service or repair attach a tag to the in strument identifying the owner and indicating the service or repair to be accomplished include the model number and full serial number of the instrument In any correspondence identify the instrument by model number serialnumber and serialnumber prefix 2 11 If original container is to be used proceed as follows Placeinstrument inoriginal container ifavail able if origina container is not available one canbe purchased from your nearest hp Sales and Service Office b Ensure that container is well sealed with strong tape or metai bands 2 12 If original container is not to be used proceed as follows a Wrap instrument in heavy paper or plastic before placing in an inner container b Place packing material around all sides of instrument and protect panel face with card board strips c Place instrument and inner container in a heavy carton or wooden box and seal with strong tape or metal bands d Mark shipping container with DELICATE INSTRUMENT FRAGILE etc Scans by ArtekMedia
42. EPIIT oF AGL 3213 2 ia eu Apt vit 2 HAT ob is DOM 1910972 uk coy E Alt ae Wet 7 t HRF For Sra ATT Ha MOd 32N3H34 H b lar umi 41 apre 201 Ags Ale Laid moo Poe 2 bli er IN NIRS 30 1 AP 8 Bon W 1 idet 20182 i FLN A dI Ais H ier At AL poe 9924 WENO PRU ei wol 00 pO weet SM tore RAR Bele pr EU sou e037 4 ou MES a B ne 1 015 n E AOE 5 f munis Aree 019 LI LI y r MI ecd j 28 ay Af on 40 lis i 3 or ee LT ar 5 cord 1 ir Er Gin2ar028 310N30 weld 9 3 SNOLLISOS ATH SERVOS HONTE TVAE E 30 ONG HONX ROMA OMIA awe dw de uide de MA 21 5 11 5 grp 5 omia LNALAO ON ATINA fay RETOAI RE pans KI HLM MPOT HHV AAI E3DVITOA 1841 HOHE ST UM Awa HOLOERNNOO V 40 GNOSIS
43. LINE switch to ON NOTE To assure maximum stability allow the instrument to warm up for 30 minutes Scans by ArtekMedia O 2008 Section III c Connect DC Voltmeter hp Model 412A to the 467A OUTPUT terminals adjust the ZERO control to obtain a zero dc output d Connect the 467A OUTPUT terminals tothe de vice to which the amplified signal is being ap plied e Connect the signal to be amplified to the 467A INPUT terminals 3 8 POWERSUPPLY OPERATING INSTRUCTIONS a Connect the467A OUTPUT terminals to the de vice towhichthe power supply is being applied b Set 467A AMPLIFIER SUPPLY control in the SUPPLY range to the desired voltage setting 1 2 4 10 or 20 c Set the LINE switch to ON NOT assure maximum stabilization allow the instrument to warm up for 30 minutes d Using theVAR GAIN VOLTS AB control ad just the voltage to the desired level NOTE The VAR GAIN VOLTS ADI con trol is used for both coarse and fine adjustments Coarse adjust is made after either limit of the fine adjust is reached Full CCW position produces maximum negative voltage Full CW position produces maximuin positive voltage 3 1 Section Model 467A 467 AMPLIFIER HEWLETT PACKARD OUTPUT 467 0900 i 1 LINE ON switches voltage on indicator VAR GAIN operates in conjunction with AM glows when ac line voltage is ON PLIFIER selector VA
44. NDICATION INDICATION Scans by ArtekMedia 2008 Model 467A PERFORMANCE CHECK TEST CARD CONT D DESCRIPTION 6 Line Regulation Check SPECIFICATION INDICATION 115 V line 1 000 V 126 5 V line within 10 mV of 115 V line 103 5 V line within 10 mV of 115 V line 4 Output Impedance Check SPECIFICATION INDICATION 500 kHz gt 0 8 V v 8 Capacitive Load Check SPECIFICATION Oscilloscope pattern no osciliations 9 Ripple and Noise Check SPECIFICATION INDICATION Supply Check lt 1 77 mV rms Amplifier Check lt 1 77 mV rms 10 Current Limit Check SPECIFICATION INDICATION Shorted output lt 800 mA eK Model 4674 6 1 INTRODUCTION 6 2 replacement parts Section Vi SECTION VI REPLACEABLE PARTS This section contains information for ordering Table 6 1 lists parts in alpha meric order of their reference designators and indi cates the description hp part number of each part together with any applicable notes and provides the following a Total quantity used in the instrument TQ column total quantity of a part is given the irst time the part number appears b Description of the part Seeiistof abbrevia Lions below c Typical manufacturer of the part in a five digit code See Appendix A for list of manu facturers d Manufacturer s part number A assemhiy B motor BT hattery capacitor CR dioda DL delay Uno DS la mp E
45. R position to pro vide variable control of amplifier gain any 2 AMPLIFIER SUPPLY selects power ampli where between zero and X10 flier or power supply mode of operation for the instrument VOLTS ADJ operates in conjunction with SUPPLY control position to provide variable AMPLIFIER X1 X2 X5 X10 selects the controlof dc outputvoltage anywhere between fixed step gain factor 0 volts and 20 volts AMPLIFIER VAR operates in conjunction INPUT banana type connectors that provide with VAR GAIN to provide variable controlof signal input andcircuit common input connec amplifier gainanywherebetween zero and X19 tions for the instrument SUPPLY selects full scale ranges 1 2 5 ZERO a screwdriver adjustthat provides com 4 10 or 20 volts pensation for dc offset or unbalance with no signal applied to the 467A INPUT terminals 2 VAR GAIN VOLTS ADJ operates conjunc tion with AMPLIFIER SU PPLY control to pro OUTPUT banana type connectors that provide vide variable control of amplifier gain or selec Signal output circuit commonand chassis output tion of de output voltage connections for the instrument Figure 3 1 Front panel Controls Indicators and Connectors Scans by ArtekMedia 2008 m Scans by ArtekMedia 2008 Model 467A Section ILI INPUT i SZ Q Gyo 115 230V 162 S OUT PUT 46 B O08SI INPUT and OUTPUT connectors the
46. RRATA Page 1 0 Table 1 1 Under Accuracy change to 1 MH2 100 kHz to t MH2 Table 5 2 In the Model 3440A 3445A AC Voltmeter Reading column the readings for the VAR CW position are not correct they should be the same as the values for the X10 position in their respectiverows e g the reading for VAR CW in the first row should be 9900 to 10 100 V 5 5 Change CA146to CR147 Performance Test Card following Page 5 10 Change the Test Limits for Accuracy and Gain Check for VAR CW as foilows 100 kHz Limits VAR CW ree 9 900 to 10 100V 10 kHz VAR CW sai rite 9 970 to 10 030 V 400 Hz VAR CW 9 970t0 10 030 V 1 MHz VAR CW 9 00 11 00 V Change the DC Voltage and Current Check from 5V CCW to CW to 4V and SPECIFICATIONS to gt 4 000 V and gt 4 000 V CHANGE NO 1 to Serial Numbers 949 02141 and Above Page 5 13 5 14 Figure 5 14 Change C7 CB to 005 gF Page 6 6 6 1 Change Part No to 01 60 3333 5000 pF Change F1 Part No to 21100336 Page 6 7 Table 6 7 Change J5 Part No to 1251 2357 Change S2 Part No to 3101 1234 Change W7 Part No to 8120 1 348 Page 6 8 Table 6 1 Change rear panel Part No to 00467 00203 11 July 1975 Page 3 3 Figure 3 2 Revise rear Manel drawing as follows s LINE INPUT SELECTOR fon epr iif
47. Table 5 4 Dc voltmeter should indicate voltage variations as listed h In the final step an output current of 0 5 A will be verifled when the 20 V is obtained across the 40 ohm load resistor 5 14 LOAD REGULATION CHECK a ADC Voltmeter hp Model 3440A 3444A and 2ohm 1 1 2wattresistor hp Part No 0727 0445 will be required for this operation b Connect DC Voltmeter to Model 467AOUTPUT Set veltmeter FUNCTION to VOLTS RANGE to 10 V c Set Model 467A to SUPPLY 41 VOLTS AZ fully CW DC Voltmeter shouldread greater than 1 000 V Note and record reading e Turn Model 467A LINE to OFF Connect 2 ohm load resistor across Model 467 A OUTPUT Leave DC Voltmeter connected as in step b Model 467A Volts Adj Supply Rotate from Fully CCW to CW 1000 mV 2 Cw to CCW 10 V 4 CCW to CW 10 V CW to CCW 10 V CCW to CW 100 v Table 5 4 DC Power Supply Operation Model 467A Turn Model467A LINE ON DC Voltmeter read ing shouldremain within 10 mV of reading ob tainedindabove Theloadis from0O 00 5 A 5 15 LINE REGULATION CHECK a A DC Voltmeter hp Model 3440A 3444A and a Variable Voltage Line Transformer Superior ElectricCompany Type UCIM will be required for this operation b Connect the DC Voltmeter to the Model 467A OUTPUT Set FUNCTION to VOLTS RANGE to 10 V c Set Model 467A to SUPPLY 10 VOLTS ADT fully CCW DC Voltmeter should read greater
48. ack or cabinet is shipped with plastic feet and tilt stand in place ready for bench use When used as a single submodule it is utilized as a bench unit only When used in com bination with other submodule units a rack adapter frame or combining case is available for rack or cabinet mounting The instrument should be installed where ambient temperature does not exceed 509C 1229 F 2 5 POWER REQUIREMENTS 2 6 The Model 487A can be operated from a 115 or 230 volt 1 source at 50 to 400 Hz Power cpa nections are made by plugging the power cable sup plied with the instrument into the AC POWER male connector at the rear of the unit and the appropriate power receptacle An 0 8 ampere slow blow fuse is used for 115 and 230 volt operation BEFORE PLUGGING POWER CABLE INTO THE RECEPTACLE DETERMINE THAT THE LINE VOLTAGE SWITCH ON THE REAR PANEL IS SET PROPERLY TO ACCEPT THAT VOLTAGE 115 OR 230 2 7 THREE CONDUCTOR POWER 2 8 Ail Hewlett Packard instruments are equipped with a three conductor power cable which complies with the recommendations of the National Electrical CABLE Manufacturer s Association NEMA for rack and cabinet grounding The offset pin on the cable is the ground connector When operating from two con tact outiet the grounding feature can be maintained by using a three pronged adapter and connecting the green pigtail on the adapter to ground 2 9 REPACKAGING FOR SHIPM
49. allf Sytvena kic Products Device Div Moonlaln View Calif Dakota Engr loc Culvor Callf Molotola Ince Semlcon eclor Prod Div Phoonix Arizona Fillon Co Inc Western Div Calves Colit Nerlbleke Redwood City Calif EI Mente Calif Westchester Aclnmatic Elerine Co SeQuo Wire Precision Coil Spang Co Comparool Service Co Brdjewaler Mass Tweatielh Cantuy Plastics Inc Los Angsbs 00015 47 Revised April Code No 05145 05277 05947 05397 05574 05593 05616 05624 05728 09729 05753 05820 0600 06090 06175 06402 06540 6559 06656 06751 96812 46380 07088 07126 0713 07138 07149 07233 07256 07281 07253 02322 0738 07397 07300 67624 07910 07933 07580 08145 02289 08358 08524 09654 08717 05718 08227 0879 08806 08984 08076 09734 Manufneturet Addross ComPanants Corp Chiczgo HI Westinghouse Electric Corp Seat Conductorf ept Ullionia ine Union Cardita Corp Div New Yon H Y Canoga Part Call Sannyvale Calif Youngwaod San Mateo Call Viking tnd Etectro Plastios ine Cosmo Plastic Electilcal Spec Co Garber Caiman Co fillen Oplical Roslyn Heights Looe 151502 N Y Melea Tel Corp Westbury Engncering Co Santa Cruz Calif Waketishd Engineering In
50. aragraph 5 20 If they are correct proceed to 8 if not go directly to 15 Measure dc voltages at side C101 be approximately 2 0 V dc to 4 tf not go directly to Shouid If 80 proceed Measuredc voltage at base of Q103 Voltage should be 4 6 Vdc If not break the circuit at the base of Q103 insert enough dc voltage through a 1 K resistor to obtain the proper signal levelat the base of Q103 Recheck instrument output voltage 420 00 V proceed to to if Measure dc voltage at base be approximately 2 2 Vdc If it is now not go directly of Q109 Should If correct pro ceed to 6 if not go directly to 2 Check Q108 Q109 0110 R133 C109 C115 C122 and other closely associated components Check R6 R147 R144 C124 R142 R143 and R5 Measure dc voltage at base of Q105 Should be approximately 31 V dc to 9 if not go directly to If proceed Measure dc voltage at J1 Pin 15 Should be d ic not 34 Vdc If 80 proceed to 10 if not go directly to 13 Measure dc voltage at J1 Pin 11 be to roximately 23 V dc Should If 80 proceed i not go directly to D Check Q1 Q2 Q3 and Q4 remove instru ment bottom cover Check 0105 0106 R136 R122 and CR10 Check 0107 R123 and CR108 114 Check 0102 0103 0104 and closely associ ated components Check switch circuit to includ
51. contains information necessary for the proper maintenance of the hp Modei 467A Power Amplifier Supply This section provides the necessary Performance Checks Adjustment and Calibration Procedures and Troubleshooting Techniques re quired te accomplish the above objective d 5 3 TEST EQUIPMENT REQUIRED e 9 4 The test equipment required to perform the 1 operations outlinedin this sectionis listedin Table 5 1 This table describes the type of instrument required g critical specifications type of operation to be con ducted and the recommender mode If the specific model recommended is not availabie equipment which meets or exceeds the critical specifications listed may be substituted 5 5 PERFORMANCE CHECKS 9 6 The performance checks presented in this sec tion are front panel procedures designed to compare the Model 467A with its published specifications These operations may be incorporated in periodic maintenance post repair or incoming quality b trol checks These operations should be conducted before any attempt is made to adjust or calibrate the instrument During these operations the Model 467A power line voltage should be periodically varied 10 A fifteen minute warm up period should be allowed prior to conducting these checks 5 7 POWER AMPLIFIER OPERATIONS 5 8 DC GAIN CHECK A DC Voltmeter hp Model 3440A 3444A and DC Standard hp Model 7418 are required for th
52. del 467A to AMPLIFIER X1 Tune C301 fer AC Voltmeter reading between 0 098 and 0 102 5 30 AC GAIN ADJUSTMENT R148 a TestOscillator hp 651B AC Volt meters hp 331A and 34404 3445 and 40 and 600 ohm loads will be required b Connect test equipmentas shown in Figure 5 1 c Set the Osciilator frequency to 100 KHz and with theAC Voltmeter connected tothe INPUT of the 467A as Ain Figure 5 1 adjust the output of the Oscillator for 1 volt as read on the AC Voltmeter d Connect the AC Voltmeter to the OUTPUT of the 467A Set 467A to AMPLIFIER X10 Scans by ArtekMedia 2008 Section V Adjust R148 for 10 voit reading the Voltmeter Repeat ac accuracy and gain check Para graph 5 9 AC Voltmeter readings should be between the limits listed in the last column of Table 5 2 5 31 TROUBLESHOOTING TECHNIQUES 9 32 This section contains procedures designed to assist in the isolation of malfunctions These pro cedures are based on a systematic analysis of the instrument circuitry These operations should be undertaken only after it has been established that the difficulty cannot be eliminated by the Adjustment and Calibration Procedures Paragraph 5 21 inves tigation should also be made to insure that the trouble is nota result of conditions externaltotheModel 467A 0 33 Conduct a visual check of the Model 467A for possible burned or loose components loose connec t
53. e Westera Eleciti Co lac New York Woslau Inst Inc Weston Newerh Newark J Mig Co Chicagn 400 Mintesobs Mining amp Co Revote Nincom Div 9 Paul Mann Hacttord Conn New _ Allan Wig Co Allied Control Allmetal Stiew Co lac Gaicen City Dalrori Mich Chicago IIb uaaa Cily J Mianeaaolis Mino Checaga Cleveland O hio New York N Y Ens Aaplex Oiv of Chrysler Atlantic India Robber Works lec Co Inc AD C Products lac Bet deo Mig Co Bild Electrome Corp Bisabach Radio Biliey Electme Cos Inc Go slon Works Div of Munay Co oi Taxas Quincy Mass Bud lac Willesghb y Ohio Cenbudge Therm ionics Corp Canbridge Mass Camloc Fastoner Corp 5 2 Casdwell Con dense Lindeckars L t Gosse ann Mig Oiv al McGraw Edeasn 1 Louis Mo Chicago nl P co Riveia Calil Elkba t lod Los Angolos Catil Sucbank Calil Chicago Chicago Condooser Co tp Celil Spring Ca Inc CTS Corp Cannon Eiactric Inc Cinema Div Aorovoz Clare amp Co Cenlt fab Div nf Globe Uolon lac Ullwavene Wis Chicago IIl NewYork A Y Commercial Plastics Ce wire Co The Cot Co inc Pisvidesro 8 1 Chicago Miaiatrie Weiks go Cinch Mig Co Howard B
54. e wakefield Mass Bassich Co Div of Wames Corp Conn Redwood Clty Calil Gavsch and Lonb Oplicat Co Rocbester N Y E T A Products of America Chicago tlt Anatom Elactredic Hardware Co inc Now fochollo N Y Seede lectaicst Instument loc Patacook N H Indt spona Ind Phooaia Ariz Cisveraud 01 Raychem Coup anorsi Devices Co Inc Compaaonts Iac Ariz Div Tosnngion Co Basi Olv Van Nuys Coll 1106 Calli Van Nuys Calil Pasadens Calil Minnaapals Div Ketvin Efecine Co TeansiSlor Elacttoni s Corp Westinghaose Electric Electronic Tube Div Fl imehm Coip Ciach Craphtk Co Silicsn Tlanaistor Cow Avnet Corp Cameras Inst Semiconductor Div Muunlain View Calit Minnesota Co flinneapolis Mina Butchor Com Tha Sylvanre Elect Prod lec Wt View Operations Mountain View Callf Cranford N J Chicago Ill oram Callf H Y New York NEY City ol ladaslty Cali Csile Place N Y Culver City Celil Technical Whe Products tne Elect Cn Continental Dica Carp Raylhooo Vig Co Sem ic ong utter iv Movnlatn View Calif We wlell Packa d Co Boonton Radro Div Rochaway N J Los Angoles Calll Pomnos Calf U S Engincarng Co Bilan Delbert Co Busgens Ba
55. e R206 209 R202 205 R4and for short 34 V supply is zero check Q7 Q8 R363 and surrounding components If 34 v 19 less than 30 V but not zero check 02 04 0105 108 114 and 0107 for short If 34 V supply is zero check Q5 Q6 R159 and surrounding components If this does not reveal malfunction check Q1 Q2 Q105 and Q106 for short 7 Vsupply is incorrect check CR115 CR116 and C125 If 7 Vsupply is incorrect check 1172 178 and C127 15 V isincorrect check circuitfrom bas eof Q109 to CR146 If 15 V is incorrect check circuit from base of Q109 to CR123 50 Vis incorrect check C111 CR125 128 and output 72 Pins 8 10 ff 50 V is incorrect check C2 CR125 128 and T1 output 92 Pins 8 103 5 9 Section V Model 467A Al MODULE BOARD 7 00 Figure 5 9 Top View oo eeeeoeooocc hd ooel O O SLi O O 1 O P e OO lt e oe ij 6206000002909 9 ums A amp TA A ODBUA ER TI Figure 5 10 Side View R2 5g 7 er ee app tun R3 467 4 4 0005 Figure 5 11 Rear Panel Scans by ArtekMedia 2008 ans bv ArtekMedia 2008 _CRI47 CRI46 CRIT TEES ono CRII6 46 8
56. ect DC Voitmeter between point desig nated in Table 5 5 and circuitground Volt meter should display readings as indicated Table 5 5 Power Supply Voltage Checks Connect DC Voltmeter Between Circuit Ground and DC Voltmeter Readings J2 Pin 7 J2 Pin 2 J1 Pin 3 41 Pin 4 Cathode of CR146 Anode of CR123 32 9 to 85 V 32 2 to 36 0 V side of C1il J2 Pin 1 CLIP ON DC AMMETER hp 428B Figure 5 5 Current Limit Check 9 9 Section V Model 467A 5 21 ADJUSTMENT AND CALIBRATION b Connect DC Voltmeter toModel 467AQUTPUT PROCEDURES Set DC Voltmeter FUNCTION to VOLTS RANGE to 100 V 9 22 The following is a complete adjustment and c Set Model 467A to SUPPLY 20 VOLTS ADJ calibration procedure for the Model 467A These fully CCW operations should be conducted only if it has pre viously been established by Performance Checks d DC Voltmeter should read 20 00 V Paragraph 5 5 that the Model 467A is out of adjust e Short Model 467A output Connect dc milli ment Indiscriminate adjustment of the instrument ammeter as shown in Figure 5 5 Set dc controls to refine readings mayactually cause more milliammeter RANGE to 1 A difficulty the procedures outlined below do not rectify any discrepanciesthat may exist and all con nections and settings have been rechecked refer to Paragraph 31 Troubleshooting Techniques for 3 26 34 V ADJUST R163 possible cause and
57. esoerch Products Corp RoitonMIg Do Inc Y ecior Fipcitonic Co Hartwell Carp Las Angoles Catil Carr Fasteser Co Mass New Homastire Bell inc Peterbetnceh N H General In slrameo Cepecitot Div Darlingion S C Los Angelos Calll Spungfieid N 1 Red Bank Mundelein Ill ITT Were and Cable Div Vletoiy Eng Ce Baetis Cosp Red Bank Orv Hubbel Colp Ra sao Inc Nowpert Beach Calil Smith Herman H Inc Brooklyn M Y Tech Labs Pel sede s Park N J Ceotsal Screw Co Chicago 111 Wite and Cablo Co Dev of Coup Binoktleld Mass Rurronghs Corp Tube OY Plalof mtd 6 J Union Carbide Ceip Consyw er Piod New York N Y Huntingtan Ind Festus Mo Lodi N J Nech N Y Son Francisca Calit Ogallele Neb amp laomlogion Ind Boonton J Sen Fraecisco Callt San Francisco Cell Hamden Coon Model Eng and Mfg Enc Leyd Struges Ca last 5 Atca Eluctsanics inc A J Giescnes Co Inc Capacitor Div Satkes Tarzan Inc Beenten Molding Compeuy Boyd Co R M Brecemonta 8 Co Kotled Kards lac Seam loss Robbe Co Chicogo lil Fatais Beorin Co Los Angelee Calil Clifloo Precision ProducisCo lac Cliften MeiBh s Pa Precision Rubber Products Corp Baylan Ohlo 0001 5 47 Revrsed April 1569 96684 86928 87034 87218
58. flm metal oxide flm metal oxide flm metal oxide metal oxide flm metal oxide flm metal oxide flin metal oxide fim comp 100 ohms metal exide flm metal oxide flm 3900 ohms 4 5 4700 ohms 59 7500 ohms 1 2 3900 ohms 5 100 K ehms 5 120 ohma 5 100 ohms 5 470 ohms 5 15 1 4 W 1000 ohms 15 1200 ohms 45 cemp 33 ohms 45 1 2 W 1800 ohms 5 3 W met flm 13 ohms 41 1 4 W met lm 16 2 met fln 2 05 ohms 1 2 1 4 ohms 1 2 1 4 carb flm 9 M ehms 41 1 W at 1 2 W at 1259C ww lin taper 10 ehms 320 metal oxide flm metal oxide flm metal oxide flm Not assigned FE xd 1 2 W R fxd 1 2 W 2 R xa Pe fxd 1 2 W 24 1 2 W 1 R fxd 1 2 W 3 Ad 1 2 W 1 1 2 W 1 fxd 1 fxd 1 2 W 2 fxd 1 2 W 1 R fxd 1 i 1 fxd 1 R ux R fxd 1 fxd 1 var 1 W R es 1 2 W 1 R fxd 1 2 W 1 Re Xd 1 2 W 1 1 2 W 1 R IX 2 W 1 R fxd 1 2 W 1 R fxd 1 2 W 1 R fxd 1 4 W d R fxg d R fxd W 1 R fxd 1 2 W fxd 2 R var metal exide flm mctal oxide flm metal oxide flm metal oxide flm 10 ohms 5 30 ohms 5 390 ohms 15 5 1500 ohms 5 75 ohms 45 33 ohms 45 68 ohms 45 met fim 1 87 enms 1 2 met flm 90 9 ohms 1 1 4 W met fim 17 4 metal oxide flm metal oxidc flm ohm
59. ge 5 10 change the Test Limits for AC Accuracy and Gain Check for VAR CW as follows 100 kHz Limits VAR CW 5 514 9 900 to 10 100 V 10 kHz VAR CW 9 970 to 10 030 V 400 Hz VAR CW 9 970 to 10 030 V 1 MHz VAR CW 9 00 to 11 00 V Table 5 2 In the Model 3440A 3445A AC Voltmeter Reading column the read ings for the VAR CW position are not correct They should be the same as the values for the X 10 position in their respective rows e g The reading for VAR CW in the first row should be 9 900 to 10 100 V 14 October 1971 Scans by ArtekMedia 2008 ent A for 00467 90003
60. h converts the amplifier to a power supply that delivers 28 volts de at currents up to 0 5 ampere The output level is controlled by a potentiometer which permits vollages to be set with resolution of 0 1 of full scale Full scale ranges 1 2 4 10 20 volts are selected by the front panel range switch 1 7 INSTRUMENT IDENTIFICATION 1 8 Hewlett Packarduses a two sectien eight digit serial number 000 00000 if the first three digits of the serial number on your instrument do not agree with those on the title page of this manual change Sheets supplied withthe manual will define differences between your instrument andthe Model 467A described in this manual 1 1 Model 467A Section SECTION II INSTALLATION 2 1 INSPECTION 2 2 Upon receipt unpack and inspect the instrument for mechanical and electrical damage Mechanical inspection includes visually checking the instrument for scratched and warped surfaces damaged contro knobs switches and indicators and signs of weather exposure The electrical inspection involves checking instrument operation against specification values given in Table 1 1 Refer to Paragraph 5 5 NOTE In case of mechanical damage file a claim with the carrier im mediately If an electrical mal functionoccurs referto thewar ranty page in the front of this manual 2 3 INSTALLATION 2 4 The Model 467A is a submodular unit that can be mounted on a bench or ina r
61. h load of gt 409 1 0 from dc to 100 kHz 10 from dc to 1 MHz Output Capability 20 V peak at 0 5 A peak Distortion Less than 0 01 at 1 kHz less than 1 at 100 kHz less than 3 at 1 MHz For full rated output Input Impedance 50 k2 shunted by 100 pF DC POWER SUPPLY Voltage Range greater than 20 V 10 V 4 V 2 V 1 with continuously variable vernier between ranges with resolution better than 0 1 of full output Current 0 5 A peak Load Regulation front panel connector Less than 10 mV for load change from 0 to 0 5 Line Regulation Less than 10 mV for a 10 change in line voltage 1 0 Specifications GENERAL Output Impedance front panel connector Nominal 5 mQ in series with ip H Capacitive Load 9 01 uF or less does not cause instability Ripple and Noise Lessthan 5 mV peak to peak when referred to output fer ail gain positions and power supply outputs Current Limit 800 mA Temperature Coefficient Less than 0 05 C or 2 mV 9C whichever is greater Input Output Terminals Front Panel 3 4 Banana terminals for input output and chassis Rear Panel BNC terminalsfor input and output Circuit Ground May be floated 200 Vdc above chassis Operating Temperature Range O to 50 C Weight Net 10 lbs 4 5 kg Power Required 115 or 230 V 210 50 to 400 Hz lt 35 W at full ijoad Dimensions Width 5 1 8 130 mm Height 6 2 2 165 mm
62. ia 2008 467A TEST OSCILLATOR hp65iB 467A B Q203B Scans by ArtekMedia 2008 Section V hp 467A POWER AMPLIFIER o Figure 5 4 Qutput Impedance Check c Connect capacitor and oscilloscope to Model 467A OUTPUT Output waveform should be stable no oscillations or ringing present 9 18 RIPPLE AND NOISE CHECK a An AC Voltmeter hp Model 331A will be required for this operation Connect AC Volt meter to Model 467A output Set RANGE to 0 003 V b Set Model 467A to SUPPLY 20 VOLTS ADJ fullyCW 20 00 V Short Modei467AINPUT AC Voltmeter should read less than 1 77 mV rms 5 mV peak to peak d Rotate AMPLIFIER SUPPLY switch to AM PLIFIER X10 AC Voltmeter should stiliread less than 1 71 mV rms 5 mV peak to peak 9 19 CURRENT LIMIT CHECK a A DC Milliammeter hp Model 428B and a DC Voltmeter hp Model 3440A 3444A will be required Set the 467A tc SUPPLY 20 and adjust the VOLTS ADJ until an output volt age of 0 000 volts is obtained using the dc voitmeter hp 467A POWER AMPLIFIER es E 0200B b Short the 467A output and connect the 428B set on the 1 range as shown in Figure 5 5 Asthe VOLTS ADJ is varied slowly the 428B should show an increasing current that is always less than 800 mA 5 20 POWER SUPPLY VOLTAGE CHECKS a A DC Voltmeter hp Model 3440A 3444A will be required for this check b Conn
63. ia 2008 MFR hp hp hp hp hp hp hp hp 19701 15042 07115 01115 16055 01121 07115 Section V1 MFR PART NO 1901 0025 1902 0048 1902 0186 1901 0026 1901 0025 1902 3296 1901 0026 1901 0025 1902 0186 1901 0025 1902 3139 69026 1165 red 69026 1064 9140 0137 9140 0096 1854 0023 1854 0019 1854 0023 1854 0019 1853 0012 1854 0022 1853 0012 1854 0046 1854 0023 2N3053 CF1 2C CEB 0 C20 C20 CEB T 2 CB2025 C20 C20 0758 0026 C20 C20 obd obd obd obd obd obd obd 6 3 Section VI DESIGNA TOR 1 115 A1R116 A1R117 A1R118 A1R119 A1R120 A1R121 A1R122 A1R123 A1R124 1R125 A1R126 A1R127 A R128 A1R129 A1R130 1 131 A1R 32 A1R133 A1R134 AlI1135 A1R136 1 137 A1R138 t AIR139 A1R140 113141 A1R142 A1R143 A1R144 11145 1 146 11147 A1R148 6 4 hp 0758 0045 0758 0005 0758 0047 0758 0045 0758 0053 0758 0013 0758 0024 0758 0023 0683 1015 0758 0003 0758 0070 0688 3305 0693 0069 0751 0756 0638 0073 0638 0072 0721 0312 2100 0396 0758 0006 0158 0079 0758 0008 0758 0017 0758 0077 0758 0049 0758 0076 0698 0070 0698 0074 0698 0075 0758 0038 0758 0047 2100 0898 PART Scans by ArtekMedia 2008 Table 6 1 Replaceable Parts Cont d BESCRIPUION metal oxide
64. ing Hollywnod Celll Micren Eleciroatcs Garden City Long island N Y A6piobe lesi Corp Lynbt ook Y Cobletronics Costa Masa ColM Twenteth Centaty Coll Spring Ca aela Ciara Framingham Mass Calil Spioce Pine N C Fermingtae Mich Lodi N J Pasadena Cslll Sem Tech Fonwol Elect toc Inc Spruce Pine Mica Co 5 Inc Computel Boets Atrc all Nul Cntc jdeal Prec Mater C nc De Meter Dev Brooklyn N Y Delco Radio Qiv ol G M Corp Kokoma lod Thasmonetic 5 Inc Cgnoga Park Calil Tranox Mouniain View Calf Components lac 81000149 Hamlin Melol P odue is Corp Akron Ohto Angatrohm Proc inc No Hollywood Handbook Sipplemenis Scans by ArtekMedia 2008 CODE LIST OF MANUFACTURERS Continued Code Manufocturer Address 17670 wcGeaw Edison Co Usochesber 18042 Powel Daatka Pacific loc Pato Aito 14053 Clevile Comp Seatconductor Dis Pala Alto Colif 18324 Signetics Corp Sonnyvate Calil 16476 Ty Car Mig Ine Mollislon Mass 18486 TR Elect Comp Oliv Des Piamns 19583 Curtis insisumeel toc Mt Kisco N Y 18612 Vishay Idsttumeats Inc Molvern Pa 18573 _ OuPoni ane Co Inc Wilmingtos Del 3690 Nuraal Mfg Co MUilwaekee Wis 19315 The Seadia Navigation amp Sontral Div Telerbeia Nd 1990 Thowas A
65. ions or any other obvious conditions which suggest a source of trouble 0 34 Table 5 6 contains asummary of the front panel symptoms that may be encountered it should be used in initial effortsto selecta starting point for trouble shooting operations 9 35 Table 5 7 in conjunction with Figure 5 8 con tains procedures which may be used as a guide in isolating malfunctions The stepsin Table 5 7 describe the normal conditions which should be encountered during the checks circlednumbers N in Figure 5 8 9 36 Thechecks outlined in Table 5 7 arenot designed to measure all circuit parameters rather only to localize the malfunction Therefore it is quite pos sible that additional measurements may be required to completely isolate the problem Amplifier gain may aiso vary slightly between instruments therefore itshouldnot be necessaryto precisely duplicate volt age values described 9 37 Conditions described in Figure 5 8 and Table 5 7 are based on the Model 467A set to SUPPLY 20 VOLTSADJ setfuilyclockwise Under normal operat Ing conditions this would provide an output voitage of 20 to 22 Vdc 9 38 SERVICING ETCHED CIRCUIT BOARDS 0 39 The hp Model 467A has three etched circuit boards Use caution when removing them to aveid TEST OSCILLATOR 267A hp 65IB POWER AMPLIFIER AC VOLTMETER hp 331A o e 29 LES ate 2
66. is test b Set the Model 467A to AMPLIFIER X10 hp 467A TEST OSCILLATOR POWER AMPLIFIER hp 6518 4674 H 5603a 467A INPUT Adjust the voltage output of the DC Standard to 1 000 V an the dc volt meter The output of the 467A should be 10 00 V 0 3 If not refer to Para graph 5 2 for proper adjustment Set the 467A to AMPLIFIER X5 output should be 5 000 V 0 3 Set the 467A to AMPLIFIER X2 The 467A output should be 2 000 V 0 3 Set the 467A to AMPLIFIER X1 output should be 1 000V 0 3 Set the 467A to VAR rotate the VAR GAIN from fully CCW to fully CW The 467A out put should vary from 0 V to 10 V The 467A The 467A 9 9 AC ACCURACY AND GAIN CHECK Figure 5 1 shows the test setup recommend ed A Test Osciilator hp Model 6515 an AC Voltmeter hp Model 331A and 3440A 3445A 40 and 600 ohm loads are required Use the 331A Voltmeter for the 1 MHz fre quency Usea 3440A 3445A with known ac curacy at 400 H2 and 10 KHz Connect the 600 ohm load resistor across the 600 ohm OUTPUT of the oscillator Connect to the INPUT of the Model 467A Set 651B ATTENUATOR to 1Vand FREQUE to 100kHz Connect the 3445A INPUT to the INPUT of the 467A A in Figure 5 1 Advance the AMPLITUDE of the Oscillator until the ac voltmeier reads 1 000V Using 40 load resistor connect the 3445A INPUT to the OUTPUT of the 467A B in Figure 5 1 Set 467A to AMPLIFIER X10 The ac voltmeter should
67. j For checkingdistortion at 1 MHz connectthe KHz FUNCTION to SET LEVEL SENSI oscillator across a6002 load to the 467A input TIVITY toprovide upscale deflection Adjust Connect the 467Aoutput across 409 load to VERNIER for full scale reading of 1 100 the inputofa 1 MHzbandrejection filter Fig me RI BK 5 5 64 3PF Li 60 100 4H d T fel 9 gt Jt INPUT ca OUTPUT 390PF QT R3 50000 2W 2100 0006 4674 8 65242 ee Figure 5 3 5 3 Section V ure 5 3B Set the oscillator frequency to 1 MHz k Adjust the oscillator output for 10 Vat the 467A output using the ac voltmeter Then connect the ac voltmeter to the filter output and the reading should be less than 0 3 V The oscil lator must have less than 1 distortion for this check 5 12 DC POWER SUPPLY OPERATION 9 13 DC VOLTAGE AND CURRENT CHECK a DC Voltmeter hp Model 3440 3444 and a 40 ohm 45 10 watt resistor hp Part No 0815 0028 will be required b Placethe 40 ohm resistor across the Model 467A OUTPUT c Connect the dc voltmeter across the 40 ohm resistor Set FUNCTION to VOLTS RANGE to 1000 mV d Set Model 467A to SUPPLY 1 VOLTS ADJ fully CCW e DC Voitmeter shouldread greater than 1000 mV f Rotate VOLTS ADJ fully CW DC Voltmeter should increase from 1 000 to 1 000 V or more 6 Repeat the above using settings listed in
68. limit setting the 34 volt supply 1 31 REFERENCE SUPPLY 4 32 The diode regulated reference supply refer to Figure5 14 provides 7 7 15 and 15 voltages Capacitors C126 and C128 filter the ac voitages Breakdown diodes CR146 and CR147 maintain a 15 reference voltage at the junction of R149 and R150 The series arrangement of diodes CR120 and CR121 forward biased diodes and CR122 and CR123 re verse biased diodes compensates for temperature and provides a constant 15 reference voltage at the junction of R151and R152 The plus and minus 7 volt reference voltages are obtained in the same manner as the plus and minus 15 reference voltages Series regulator Q111 provides regulated 30 volts to the positive side of the reference supply Scans by ArtekMedia O 2008 Scans by ArtekMedia 2008 Section V Model 467A Table 5 1 Test Equipment Required Instrument Critical Specifications Use Recommended Model DC Voltmeter Accuracy 0 05 Performance Checks hp Model 3440A 3444A Range 1000 mV to 100 V Calibration Digital Voltmeter Oscillator Frequency 10 Hz to 1 MHz Performance Checks hp Model 651B Test Output 1 0 V Calibration Oscillator Output igo i 90 or 600 ohms i ion lt AC Voltmeter Frequency 10 liz to 100 KHz Performance Checks hp Model 3440A 3445A Range 10 V Calibration Digital Veltmeter Accuracy 0 1 0 0 3 Frequency
69. nia Inc 49 Pasadoo0 Colif Waltham Moss Pale Alta Calit Downoy Caiit Prncision Connectar Carp lamaica N Y Dongan Ejactronics lan Gasta Mesa Calif Genaral 10540 Corp Semicon duc toi Oiv Prod ucts Group Newark N J Imperia Elecironic tne Buece Paik Molebs loc Polo Alto Calif 0 lionat Semiconducloi Danbury Conn Philedeiphia Haodle Co Camden J Grove Mig Ca Inc Shady Giovo Pa Gulten ind foc Data Systom Div AlboQoerque Dover W Havan Cans Tokyo Japon Clash Nod Newgorl Boach Scallsdale Arizona State Electiontcs Corp Totedyao Inc Micenwave Div Naliocal Clarostal Mig Co Elwas Filter Corp Electric Co Lid l ctrooits Semszonductne inc Dickson Electronics Corp Thermoltoy Dallas texas Telefunken Hanover Germany Mid aud Mrlght Div ol Pacific Industries Ines Kanaas City Kansas Ne wboty Park Calif Resislai Corp Santa Monica Colif American Componenta Inc Conshohacken Fa TT Semicooductor A 01 olini Telephone amp Tslegrbpb Corp West Palm Baach fla Hewlett Packard Company Loveland Colo Cornell Dubfimr Coto New 31 N J Coraing Glass Works Carming Eteciro Cube Inc Sen Coillt Williams Mig Co San Jose Call Master Electzaorcs New York Y Soionics Corp Noithrldgo Cal Adwstedia Bush
70. ood City Dalll Chicage Ill Gema Mfg Inc F Develoamenl Ce Malco Mig Co inc Hanoy well Ipc Micro Swilch Div Fieadorl 111 Oakland Cell Peabody Mass Rochestar N Y Natm Bros Spring Oo Tra Connector Corp Elgeel Ontical Co Inc Tensolile tosulated Wire Ce Inc Taorsylown N Y Wesbury Long Island N Y Keerney N J IMC MaBnetics Corp Hotsen Lamp Co Sylveoia Electric Prod Inc Semiconductor Div Wobusn Mass Robbins amp Myers Inc Palisados Park J Stnmco Controls Div ef EssaxWim Corp Mansfield Ohio Colser City Calit Livingston N J Bayoano N J Yonkers Waters Mig Co G V Controls Cenerel Cable Corp Pheips Dodge Raytbeon Co Comp Div Ind Comp Dporaltone Quincy Mass Se nntiluc Elecltomos Producis lac Covet d Coto Wagner Elect Tung Sob Div Newark A J Cortiss WesBht Com Electtooxs Div Easl Paterson 1 Cheslec Bellwaed 111 Brooklyn N Y Sonth Chester Corp Wire Cloth Products inc Automalic Melal Produ ols Co Worceslar Piess al Alumioum Worcoslet Mass Magneciatt Electric Co Chicago ills George A Philbrick Rosoarctnrs lnc Boslon Mass Doala Fla Weodside N Y Lang Island N Y Sheridan Wyo Bildgeposl Cone Btoomflold N J Relling Meadows Ill Allses Producis Corp Cotmtincatal Coanectos Coro Laecrall Mig Co foc Netronei Coil Co Vilramon lac Gorda
71. pt Hodson Falls N Y Brockton 55 Miiwsukes Wis Celit kawida Catil incoring Co Alden Praducis Co Allen Bradley Co Litloningustfiau Inc TRY Samicoodeclocs Inc Texas insliomegsts INC Trarsestor Products Div The Adiwnca Mig Co Ralays Inc Gudebma 8 05 Silk Ca Amarack Corp Polse 3nglneerag Fartoucube Cow of Amaga Wheelock 5120215 Inc Cole Rabber and Plustics Inc Sonnyvale Calif Ampherol Bore Electronics Comp Btoadviaw 111 Radio Corp America Samicoaducio and Natenals Div Somethin Vocaliie Co oF Ametica Inc Did Saybt amp oW Conn San Forgando Calil Newarh 8 1 Sytacoso N Y Ohen Compton Calit Los Angeles Wak 811210 Maas Cadar Kanlls N J Gallas Tesss Alliance Ohio Van Nuys Calit New Yoik N Y Recklotd 1 2313 Clara Call Saugerties N Y Long Btanch N J Hopkins Engineering Hodson Tos amp Dre Co E Semicondicto Prod Dapt Apex Machine amp Toot Co Eldem Corp Parhor Seal Co Treo ailrog Electric Cond Pylofiim Rosisfo Qa SinBet Co Diehl Div Findoroo Plan Sumetville N J Arrow Hori and Hegeman Ecl Co Wattford Coon Lambertville N J Greal Mech M Y Corp Arco Electronic tne Hi Q Division af Aetovoa Beach C Precision Paper Tuoe Co Whealing HI Dymec Drvisson of Howlett P ack ard Co Palo Atto C
72. quency amplifier atwo stage differential amplifier a driver amplifier and two power amplifier stages These circuits pro vide two modes of operation the power amplifier mede and the power supply mode 4 3 Whenthe AMPLIFIER SUPPLY switch is in the AMPLIFIER position the gain can be set in fixed steps of X1 X2 X5 and X10 When the switch is in the AMPLIFIER VAR position the VAR GAIN VOLTS ADJ control can be used to set the amplifier gain to any value between zero and ten The input signal is applied to the attenuator which selects the gain to be used by the instrument amplifier circuitry Ac and dc feedback stabilize the amplifier gain Compensation for dc offset or unbalance is provided by a ZERO adjust control on the front panel 4 4 Whenthe AMPLIFIER SUPPLY switch is in the SUPPLY position the amplifier provides five power supply voltage ranges 1 2 34 10 and 20 valts variable from plus through zero to minus for each range An internai de reference voltage plus minus is applied tothe amplifier portion which pro vides regulateddc voltage at the OUTPUT terminals of the instrument 4 5 BLOCK DIAGRAM DESCRIPTION 4 6 Figure 4 1 shows the block diagram for the 467A The input signal is applied to the high and low frequency amplifiers The high frequency amplifier Q101 amplifies the ac signal the low frequency am plifier Q108 through 0120 amplifies the dc and low frequency signals The amplified inp
73. r 4 2 Medel 467A 4 25 POWER SUPPLY CIRCUIT DESCRIPTION 1 26 The 467A prlmary power supply consists of two regulated power supplies 34 and 34 volts and five reference supplies 7 7 15 15 and 36 volts Either 115 or 230 volts ac is connected to the instru ment through switch S1 and fuse to T1 primary Switch S2 slide switch on rear panel comects T1 primary windings in serles for 230 volt operation or in parallel for 115 volt operation The LINE ON lamp DS glows whenprimary powerisapplied tothe instru inent 4 27 MINUS 34 VOLT SUPPLY 4 28 Transistor Q112 in conjunction with R156 CR129 and CR130 provide a constant current source which provides base drive for Q5 and Q6 0112 also provides current to keep CR131 CR132 CR133 and CR135 conducting R2 Q5 share the load current to reduce the dissipation in Q6 For small load currents Q5 1s turned off and resistor R2 supplies the current As the load current increases the base of Q5 is forward biased and Q5 conducts sharing the current As the load current is increased further CR134is forward biased at a current level determined by R159 This will reduce the current in CR135 to zero causing the supply voitage to go to zerc also 4 29 PLUS 34 VOLT SUPPLY 4 30 The 34 volt supply provides regulated voltage to the power amplifier circuits Breakdown diode CR143 establishes the reference at the base of Q8 Potentiometer R163 adjusts the current
74. recommended corrective action a Rotate VOLTS ADJ fullyCW 420 00V output 9 23 ZERO ADJUST b Adjust R163 for ammeter reading of 650 mA A DC Voltmeter hp Model 34404 3444 will be required for this operation 3 27 DC GAIN ADJUSTMENT R147 a A DC Standard hp Model 741B and a DC b Connect dc voltmeterto Model467A OUTPUT Voltmeter hp Model 3440A 3444A will we Set FUNCTION to VOLTS RANGEto 100 Set Model 467A to AMPLIFIER X10 Short INPUT f Adjust R159 for ammeter reading of 650 mA required for this operation b Set Model 467A to AMPLIFIER X10 c Connectdc voltmeterto Model 467A OUTPUT d Adjust R5 front panel ZERO for zero reading Set FUNCTION to VOLTS RANGE to 10 V on DC Voltmeter i e Remove short at Model 467A INPUT f Adjust R133 internal adjustment for zero reading on DC Voltmeter d Adjust DC Standard for 1 V dc output Apply to Modei 467A INPUT e DC Voltmeter should read 10 0 V If not ad just R147 for proper reading g If necessary repeat steps d through f above until voltage difference is less than 1 0 mV 9 28 BALANCE ADJUST C124 9 24 CURRENT LIMIT ADJUSTMENT a Figure 5 6 describes the test arrangement recommended Test Oscillator Model 5 25 34 V ADJUST R159 651B DC Voltmeter hp Mode 3440A A DC Voltmeter hp Model 3440 3444 3444A an AC Voltmeter hp Model 331A and a DC Milliammeter
75. s 1 2 e 1 4 9100 ohms 39 7500 ohms 1 2 prec ww 500 ohms 5 MFR 07115 07115 07115 07115 07115 07115 07115 07115 01121 07115 07115 01121 76055 75042 76055 76055 19701 07115 07115 07115 07115 07115 07115 07115 79042 76055 76055 07115 07115 hp Model 467A MFR PART C20 C20 C20 C20 C20 C20 C20 C20 CB1015 C20 C20 EB3305 3 MOL CEB T 0 CEB T 2 T 2 CF 1 2 2100 0395 C20 C20 C20 C20 C20 C20 C20 17 9 CER T 2 9 C20 C20 2100 0898 oba obd oba obd obd obd obd obs obd obd obd obd obd obd obe obd obd 467A Section V Table 6 1 Replaceable Parts Cont d EL REFERENCE hp PART NO MFR BESCRIPTION DESIGNATOR A1R149 A1R150 A1Ri51 A1R152 A1R153 A1R154 A1Ri55 A1R156 A1R157 A1R158 A1R159 A1R160 A1R161 A1R162 A1R163 A1R164 1 165 2 2 201 2 202 2 203 A2R201 A2R202 A2R203 A2R204 A2R205 A2R206 A2R207 A2R208 A2R209 25201 A3C301 A3C302 A3C303 A3C304 A3C305 0758 0068 0758 0045 0758 0070 0758 0083 0758 0035 0811 0939 0686 4705 0758 0020 0758 0015 2100 1415 0758 0037 0761 0013 0758 0083 2100 1415 0758 0064 0758 0005 00467 6
76. s C301 C303 and C305 be adjusted to provide the desired frequency response characteristics for the instrument Ac input signals from the attenuator are applied through C101 to the high frequency amplifier 0101 The signal is amplified by Q101 and coupled through C104 to the base circuit of 9102 The RC networks C105 R112 C106 and R114 are used to improve the frequency response characteristics ofthe amplifier Q102 The bias volt age of 0101 is determined by resistive divider R103 and R104 Ac feedback from power amplifiers 01 Q2 Q3 and Q4 is applied through R148 to provide ac gain adjust for Q101 4 13 LOW FREQUENCY AMPLIFIER 4 14 When the AMPLIFIER SUPPLY selector is in the SUPPLY position 7 and 7 volts are supplied from an internal reference through resistive dividers to the amplifier input Each SUPPLY position 1 2 4 10 and 20 permits setting the dc output voltage toany value withintherangeselected Thelow frequencyamplifier circuit 9108 Q109andQ1i0 am plifiesthe dc and low frequency input signal and drives 9103 The bias voltage for the low frequency amplifier is controlled by R132 and R133 and the ZERO control R5 Transistor 0110 is a current source for the dif ferential amplifiers Q108 and Q109 Inductors L101 and L102 control the frequency response of the low frequency amplifier at higher frequencies by causing degeneration of Q108 and Q109 emitters High fre quencies present at Q109
77. s Corg Methede Mig Scans by ArtekMedia 2008 Address Code No Manu facturer Address 95566 Aran ld Engraearing Ca Marengo Ill 95712 Dage Go Inc Fianklto Ind 99984 Siemon MIE Co Wayne tll 95987 Weckasses Co Chicago Ill 96067 Miciowava Assoc Wesl Inc Snnny yale qu 96095 Q Div of Corp N Y 36056 Thordarsen Maissnes Inc Mt Carmel Ili 96296 Solar Manufacturing Los Angeles Celi 96306 Mletoswileh Olv of Minn Hnoaywell Freeport 111 96330 Carllen Screw Co Chicage 111 9634 Micrewevo Associates Ine Berlingtan Mass 9650 Excal Tlonsformos Co Oakland Calif 96733 San Fernando Eleal Mtg Co Sen Fetnando Calil Long Is N Y Irvingtoo N J Thomsen Ind Inc Indusirtel Retaining R ag Co 688 97464 97529 Antomatic amp Precision Mfg Englewood 97973 Reon Resistor Corp Yonkers N Y 97983 Lilton System Inc Adler Wastiex Com an Div Rochalla 38141 R Troncis lac Jamaica N Y Rubber Teck Inc Gardena Hewlelt Pachad Moseloy Civ Pasadena Calli 98159 98279 98278 Micredel tnc So Pasadene Colil 98291 Sealeotio 98375 Zero Mfe Burbank Calif 984 Ele inc Cloveland Ohin 98731 General Mills Inc Electrantes Div Ninccepolls Mina 98734 Biv ol M awretl Packaid Co Palo Allo Cafif 98821 North Hill
78. s Electtouics Inc Glen Cove N Y 98978 Intematiooal Eluctcoarc Researcn Carp Barbank Calli 59109 Columbia Technical Corp New York H Y 99313 Associates Pslo Alto Callf 99376 Allee Corp Winchester Mans 99515 Macstatl lod Capacitot Div Mcerowe Calf 99707 Coattrol Switch Division Cootrats Co ob El Segundo Cetif 99800 Delevan Eleclronios Corp Eosi Aoma N Y 99848 19928 99334 99942 Indiacapatis lod Whippagy J Mass Wice Corporalinn Branson Renbrenct Inc Hoffman Electranecs Corp Semiconductas Div El Monte Calil Technology lastrument Corp of Callf Newbury Park 99957 THE FOLLCUING VENDORS HAVE NO NUMBER ASSIGNED IN THE LATEST SUPPLEMENT TO THE FEBERAL SUPPLY CODE FOR MANUFACTURERS 0800 0000F alco and Die Los Angetes Cai 90002 Willow Prodncts Cor Newark 1 000 ETA England 00088 Preciason Insriument Compoconts Co Y aa Nuys Calit 00065 Hewlell Packasd Co Celarado Springs Colorado Springs Colorado 002MN Robber Eng Deveispmeni Hayweid Calif 000NN A N D MIB Co San Jess Calil 00090 Cool roo Oakland Celif 000WW Coliletaia Eastern Leb Jurtinglon Celil 000YY Smilh Co Los Angoles Colil From FSC Handbook Supplements Scans by ArtekMedia 2008 MANUAL CHANGES MODEL 467A POWER AMPLIFIER SUPPLY Manual Part No 00467 90003 B New or Revised item E
79. se BNC power transformer This fuse is used for both connectors are connected in parallel with the 115 v and 230 v operation INPUT and OUTPUT terminals the front 3 Power Connector accepts a 3 wire power panel cable with safety ground 2 FUSE contains a fuse which provides protec 4 Line Voltage atwo position slide switch sets tion for the primary circuit of the instrument the 467A for 115 230 volt operation Figure 3 2 Rear Controls and Connectors Model 467A Section IV 9002 Aq sueds ureiderq 12014 perdus p p amsty 42990333 it i 10H1N02 Ta 20 Fah L 215 EI Sony Tre e MOVBO334 ONY Poo 90 0 20101 VIL LN 383 441 u3MOd AON310383 5 63 Y i 9010 19016 016 2010 mast n H3ldI Td Wt Ww 1N3433di0 HATA HIA TENT 1005 1H WV ASN SNOS ES 2 E ss _ TV jvH0334 2215 TaJ roy JY 5 ud311 oly O IH rn 341 Mi YIN r Fr Pd NI rav WH Ag Scans by ArtekMedia 2008 Model 467A section IV SECTION IV THEORY OF 4 1 INTRODUCTION 4 2 The Model 467A Amplifier circuits include a high frequency amplifier a low fre
80. sislasce Prodects Ce Robber rsll Corp of Terrasee Calif Shaneproo Drviaron al Itiinots Tool Worcs Elgin 50 8210706 Mass NewYork Palman N J Nerak Chicago ll San Fradelsco Calli St Marys Pa Walttam Mass Ctevelaod Qhio Sac Gah ied Kowlonvile Mass Loog laland Sity N Y Hartiot Conn Chteage 111 Sigma Signal Indicator Corp Stiulhers Cono Inc pecialily Leather Prod Co Thomp son Biemer amp Co Tilloy Mig Co Stackpale Carbon Co Standatd Thomsos Corp Products lac Engineers Uciene Co Waldes Inc Veeder Root Inc Waoco Mfg Co Canlioentas Wist Electronics Coup Phiredeinhia Pa Mig Corp New Rochelle N Y Division of Sessions Clock Co Mornsiown N J Schosfzet Alloy Prodwets Elizabeth N J Electiooit lodusiries Associetion Aor brand Tute mgel ng EIA Slanderds Washingbo 0 Unie ou Switch Div Manco Etectianics Corp gord Un ed Transformer Corp New York 8 Oclord Etectric Cato Chicago Ite Booras Inc Riverside Calit Acro Div of Rn heitsh aw Controls Co Colunbus Dhto FSC Banddaoh Supplameata f 80486 80509 80583 80540 80813 1039 81073 81095 8131 81349 81483 81541 81860 82042 82047 82116 82142 82170 82209 82219 82375 82389 8264 82168 82866 8287 82 893 83014 83058 83086
81. tablishes the proper voltage at Q104 collector and maintains a dc signal path from Q104 Collector to Q105 base 4 19 DRIVER AMPLIFIER 4 20 Driver amplifier Q105 is driven by current am plifier Q104 and supplies the signal to the power out put amplifiers Transistors Q106 and Q107 are for ward biased by diodes CR108 through CR 12and under no signal condition are conducting slightly to reduce cross over distortion in the output signal 4 21 OUTPUT CIRCUITS 4 22 Transistors Q1 through Q4 provide a comple mentary symmetry output Q1 and Q2 driven by emitter follower Q106 providea low output impedance Q4 driven 0107 form a unity gain feed backamplifier Thiscauses 04 toactasa PNP emitter follower which is necessary to provide the complementary symmetry output 4 23 EXTERNAL LOAD PROTECTION 4 24 The external load connected to the 467A is pro tected during turn on and turn off from current surges and voltage transients by relay 1 The relay con tacts open the circuit tothe OUTPUT connectors when the relay is de energized When the instrument is turned ON Ki remains de energized for about 300 milliseconds This delay permits the instrument to stabilize before the output is connected to the load The 300 millisecond delay is caused by the RC time constant of C110 and R161 When the instrument is turned off the relay quickly de energizes and opens the circuit to the OUTPUT connecto
82. tiery Co Niagesa Falis Ontano Canasa Deutsch Fastener Cote Los Angeles Calit Brisiot The Waletbuty Conn 51028 Company Son Valley Calif ITT Caneoe Electric Inc Phoenix Div Phoenix Arizono Natiesoal Radiol ab Inc N J CBS Electronics Se micon uelor Operalloos Div of C B S Inc Lowall Mass General Electric Co Miniat Lamp Jeph Clevatend Ohio 2320118 Ind Costs Mesa Calil Hoaslon Tesas Mel Gain Relays Div Tsxns C acilos Co Scans by ArtekMedia 2008 1 Cal Code No 08145 9239 83353 09550 93322 10214 10411 10645 111 11237 11242 11312 11314 11453 11534 14711 11717 11870 12040 12136 12361 125 12537 12728 32859 12881 12930 2854 13183 13396 13835 14093 14133 14292 14133 14493 14655 14674 14752 14960 15203 15237 15291 15548 15586 15831 15772 15801 18818 15837 16179 16332 16545 16588 16796 17109 17474 17554 17575 11745 From Manufacturer Address Burbank Calil Chicago Ill Newloo Mass Tech ind Inc Atahm Elect Electo Aasoablias Inc C amp Co tponen s tne Mallory BHaltery Co ol Cauads Ltd Butady Corp General Transisimi Weslern Core Los Angeles Cail Berkoley Caltf Niagara Falls M Y B eina lad Tw oal Onbatlo Cana do Norwalk Coon Ti Fal loc Carborondum Ca CTS af Berne Inc Chicage Telephone at Calilor
83. ut signal is then applied through the differential amplifier Q102 and Q103 amplifier 0104 and driver amplifier 0105 to emitter followers 0106 and 0107 Power ampli fiers Ql andQ2 driven by Q106 and Q3 and Q4 driven by Q107 provide a balanced signal to the OUTPUT connectors 4 7 At frequencies above 1 MHz negative feedback from the driver amplifier Q105 is applied to Q101 through C122 and R129 to provide a decrease in dis tortion and remove the power amplifiers from the feedback loop Negative feedback from Q105 is applied to differentialamplifiers Q102 and Q103 through R120 115 R119 to improve frequency response of the instrument Gain controlforhigh requency amplifier Q101 is supplied fromthe output of the power amplifiers Qi through Q4 through R148 and R130 4 8 At frequencies between dc and 50 KRz negative feedback from the output provides dc gain control and baiance adjust for thelow frequency amplifiers Q108 through Q110 ZEROadjust R5providescompensation for dc unbalance of the signal applied to the low fre quency amplifiers Relay K1 protectsthe externalload against current surges during turn on and turn off OPERATION 4 9 SCHEMATIC DIAGRAM DECRIPTION 4 10 Thefollowing paragraphs givea detailed descrip tion of the Model 467A Amplifier circuits Refer to Figures 5 13 5 14 Section V for the schematic diagrams of the instrument 4 11 HIGH FREQUENCY AMPLIFIER 4 12 Trimmer capacitor
84. y 1510 0627 Delete Insul BNC Panel 5040 0425 Delete Panel Rear 00467 00203 Add Panel Rear 00467 00 213 Delete Connector Ass y 5060 0625 Add Binding Post 151 0 0084 4 TQ Add Insul Bdg Post 03400732 9 TQ Page 3 3 Figure 3 2 Revise Rear Panel follows Drawing as Em Page 5 11 5 12 Delete J8 J9 6 6 Delete R401 75 ohm 05 0758 0080 R407 100 ohm 05 0758 0024 R411 10 kilohm 05 0758 0006 Ade R401 75 ohm 01 0757 0710 R406 68 1 ohm OT 0757 0709 R407 100 ohm 01 0757 0178 R411 10 3 k ohm 005 0757 0108 MANUAL CHANGES 467A CHANGE NO 7 Applies to All Seria Numbers Page 1 0 Table 1 1 Under Power Required change 50 to 400 Hz to 48 to 66 Hz Under Input Output Terminals delete reference to Rear Panel BNC connectors are removed Under Output Impedance delete from panel connector Page 2 1 Paragraph 2 6 Change 50 to 400 Hz to 48 to 66 Hz Page 3 3 Figure 3 2 Delete Index number and description On rear panel change marking 440 Hz to 66 Hz Page 5 1 Paragraph 5 9 After paragraph heading add NOTE Do not use low impedance cable 50 X Cable cupacity adversely effects trequency response CHANGE 8 Applies to Serial Numbers 994403426 and above Page 5 11 5 12 Change A1R150 to 562 lehris Delete Capacitor 6 2 Change A1CR101 A1CR102 to 1901 0376 6

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