Manual s/n prefix 010
Contents
1. gt BET e a Set 739AR controls as follows RANGE Selector Switch FREQ TUNING sas 3 on dial AMPLITUDE Advance until OUTPUT METER reads SET LEV el b Connect the output cable of the T39AR inte nally terminated with a 50 ohm load to the ah put of the 524D Electronic Counter U hp Model 10110A Adapter c Set the 524D controls as follows STD FREQ Counted 10 Me A FUNCTION Selector Frequency STD GATE TIME Sec 0 1 d Change the frequency of the 739AR Fr 3 Response Test Set tothe frequencies listed tin Table 5 2 The frequency should be withinthe d limits in the tolerance column 6 5 E 00203 1 y sel properly to assure highest instrument accuracy Section V Paragraphs 5 13 to 5 21 and Table 5 2 Table 5 2 Frequency 0 3 megacycles 5 megacycles megacycles 5 megacycles megacycles megacycles megacycles Frequency Accuracy Tolerance from 282000 to 318000 cps from 470000 to 530000 cps from 940000 to 1060000 cps from 1410000 to 1590000 cps from 2820000 to 3180000 cps from 4700000 to 5300000 cps from 9400000 to 1060000 cps al EH EN LI eS OUTPUT VOLTAGE ATTENUATOR CHECK a Connect the 739AR OUTPUT to the 403B AC Voltmeter with the 739A 164 output cable in i ternally terminated in a 50 ohm load b Set the T39AR controls as follows _ RANGE Selector 0 3 to 1 Me FREQ TUNING Dial 3 ATTE2. 9 5 0200 Fat 250v RT Ril be ATOK 34 8 fiabe VI PAX 6C4 OH DIFFERENTIAL i a DC cs L AMPLIFIER 8 3B CALO AMPLIFIER oul el a RA f F Ke 4M ai geg D hi ARS A w f KL CE e Les cia pa D F bech BIG DHF G r Sekt a E 5 ai V2 e le 6405 3 SV4A V4A B lt OSCILLATOR ST See ae yo y DIFFERENTIAL AMPLIFIER CH CHI TRL IM 100 b HATTEMUATOE 1 OO A 4 LIT ON POSITONS OF re C S10 8 0 0 GANGET Geh e Sic r z ar TEN RANGE SELECTOR ee Wi eg JATOR GSC FREQ MC 07 3 we i EU Rs Lu Wm Sak CHE 5030 5030 cre dh rez m3 __ 500 300 7 CIS o LS 820 2 OA fa M e OL Af i 250 Y REFERENCE DESIGNATORS L MASSIGNEL y5 sd ON THIS DRAWING DESIGNATORS Exa Sr Li Tri 24 RECTIFIER cei CRA F cs Fi JI Li b2 M bi b i Ri THRU R27 E SLABCOE 2 vi THAU VS WAL THAU VRAa R27 IZK DOT S i E Perm ER n i 0 alanis A 1011298 p UV6EL 19PON WARRANTY All our products are warranted against defects in materials and workmanship for one year from the date of shipment Our obligation is limited to repairing or replacing products except tubes which prove to be defective during the warranty period We are not liable for consequential damages For assistance of any kind including help with instruments under warranty contact your authorized Ze Sales Representative
3. 04651 04713 04732 04773 05006 05277 05593 05624 05729 05783 06004 06555 0646812 07115 MANUFACTURER ADDRESS Humidial Co Colton Calif Wastrex Corp Mew York N Y Garlock Packing Co Electronic Products Div Camden N J New Bedford Mass Amp Inc Harrisburg Pa Aircraft Radio Corp Boonton N J Sangamo Electric Co Cap Div Marian III Los Angeles Calif Los Angeles Calif Aerovox Corp Goe Engineering Co Carl E Holmes Corp Allen Bradley Co Milwaukee Wis Litton Industries Inc Beverly Hills Calif Pacific Semiconductors Inc Culver City Calif Texas Instruments Inc Semiconductor Components Div Dallas Texas The Alliance Mfg Co Alliance Ohio Chassi Trak Corp Indianapolis Ind Amerock Corp Rockford Ill Pulse Engineering Co Santa Clara Calif Ferroxcube Corp of America Saugerties M Y Palo Alto Galit Chicago Ill Cole Mfg Co Amphenol Electronics Corp Radio Corp of America Semiconductor and Materials Div Somerville N J Vocaline Co of America ine Old Saybrook Conn Hopkins Engineering Co San Fernando Calif G E Semiconductor Products Dept Syracuse N Y Apex Machine amp Toal Co Dayton Ohio Eldema Corp EI Monte Calif Transitron Electronic Corp Wakefield Mass Pyrofilm Resistor Co Morristown PJ Air Marine Motors Inc Los Angeles Calif Arrow Hart and Hegeman Elect Co Hartford Conn Elmenco Products Co New Yor
4. Conn Fed Telephone and Radio Corp Clifton N J Schenectady N Y Tetarbo ro N J General Electric Co G E Lamp Division Mela Park Cleveland Ohio General Radio Co West Concord Mass Grobet File Co of America Inc Carlstadt N J Hamilton Watch Co Lancaster Pa Hewlett Packard Co Palo Alto Calif G E Receiving Tube Dept Owensboro Ky Lectrohm re Chicago Ill P R Mallory amp Co Inc Indianapolis Ind Mechanical Industries Prod Co Akron Ohio Miniature Precision Hearings Inc Keene N H Muter Co Chicago III C A Norgren Co Engiewood Colo Ohmite Mfg Co Skokie IH Polaroid Corp Cambridge Mass CODE NO 48620 49956 54294 53026 55933 55938 56137 p6299 594485 417785 62119 64959 65092 66346 70276 70309 70485 70563 70903 70998 71002 71218 71206 113414 71400 11450 71468 71471 71482 11590 71700 71744 71753 1785 71934 12136 72354 72619 72656 72758 72765 72825 72928 72982 73061 13133 13293 73445 73504 73559 73882 73743 13793 MANUFACTURER ADDRESS Precision Thermometer and Inst Co Philadelphia Pa Raytheon Mfa Co Waltham Mass Shallcross Mfg Co Selma N C Simpson Electric Co Chicago III Sonotone Corp Elmsford N Y Sorenson amp Ca Inc So Norwalk Conn Spaulding Fibre Co Inc Tonawanda N Y Sprague Electric Co North Adams Mass Telex Inc St Paul Minn Union Switch and Signal
5. Div of Westinghouse Air Brake Co Pittsburgh Pa Universal Electric Co Owosso Mich Western Electric Go Inc New York N Y Weston Inst Div of Daystrom Inc Newark N J Wollensak Optical Co Rochester N Y Allen Mfq Co Hartford Conn Allied Control Co Inc New York N Y Atlantic India Rubber Works Inc Chicago Ill Amperite Co Inc Mew York N Y Belden Mfg Co Chicago Ill Bird Electranic Corp Cleveland Ohio Birnbach Radio Co New York N Y Bud Radio Ine Camloc Fastener Corp Allen D Cardwell Electronic Cleveland Ohio Paramus N J Prod Corp Plainville Conn Bussmann Fuse Div of McGraw Edison Co St Louis Mo CTS Corp Elkhart Ind Cannon Electric Co Cinema Engineering Co Burbank Calif C P Clare amp Co Chicago ill Centralab Div of Globe Union Inc Milwaukee Wis The Cornish Wire Co New York N Y Chicago Miniature Lamp Works Chicago tl A O Smith Corp Crowley Div West Orange N J Cinch Mfg Corp Chicago HI Dow Corning Corp Midland Mich Elecr o Motive Mfg Co Inc Willimantic Conn Los Angeles Calif John E Fast amp Co Chicago fil Dialight Corp Brooklyn N Y General Ceramics Corp Keasbey N J Girard Hopkins Oakland Calif Drake Mfg Co Chicago HL Hugh H Eby Ine Philadelphia Pa Gudeman Co Chicago Ill Erie Resistor Corp Eria Pa Hansen Mtg Co Inc Princeton Ind Helipot Div of Beckman Instruments inc Hughes Product
6. and at 8 Me to see that they are within 6 of reading NOTE The other two ranges should be calibrated whenever the 3 to 10 Me range is calibrated 9 26 CALIBRATION OF THE 1 MC TO3MC RANGE a Set 739AR RANGE SELECTOR to 1 Me to 3 Me range b Set FREQ TUNING dial to 1 c Adjust slug in Ty for 1 Mc output as read on the 524D Electronic Counter See Figure 5 3 for location d Rotate FREQ TUNING dial to 3 e Adjust C3 for 3 Mc output 5 4 Model 7394 5 27 CALIBRATION OF THE 0 3 MC TO 1 MC RANG a Set 739AR RANGE SELECTOR 100 43 Me tol Mc range FREQ TUNING dial to 3 b Adjust slug in T for 300 Ke output as read a the 524D Electronic Counter c Rotate FREQ TUNING dial to 1 Mc d Adjust C2 for a 1 Me output 5 28 FREQUENCY RESPONSE ADJUSTMENT 0 Mc to 10 Me ified by procedures Paragraphs 5 10 through 5 1 9 29 This adjustment should be made after itis 14 that the frequency response is out of specification the procedure in Paragraph 5 11 steps a through f a Use the test setup shown in Figure 5 2 n a b Change the 739AR RANGE SELECTOR to th 3 Me to 10 Mc range andadjust AMPLITUD control until the METER pointer is on SEI LEVEL e Sweep through the frequency range A Mc ti 10 Me adjusting C16 on the Diode Assembl Board for minimum deviation from zero a the nullmeter Readjust AMPLITUDE at each frequency so that the METER pointer on SET LEVEL If C16 does not fic
7. lockwise Slop when pointer is exactly on zero If re pointerovershoots zero repeat steps e and d SE A O e EE Section V Paravraphs 5 22 to 5 44 e When pointer is exactly over zero rotate the adjustment screw a few degrees counterclock wise or enough to free the adjustment screw from the meter suspension If the pointer moves during this step repeat steps c through e 5 22 For all of the following adjustments the 739AR must be removed from its case Remove lwo screws fromthe rear paneland two screwsfrom each side of the front panel Slide chassis from the case THE FRAME OF THE TUNING CAPACITORS NORMALLY HAS A POTENTIAL OF APPROXI MATELY 150 VOLTS 9 23 FREQUENCY CALIBRATION PROCEDURE 9 24 Connect the OUTPUT of the T39AR to the input of the 524D Electronic Counter using the 739A 16A Output Cable and an hp Model 101104 BNC to banana jack adapter 9 29 CALIBRATION FOR THE 3 TO 10 MC RANGE a Set the T39AR controls AS follows RANGE Selector 3 Me to 10 Me FREQ TUNING Dial o ATTENUATOR gt 3 amp 8 AMPLITUDE Adjust until ME TER reads SET LEVEL Bom Turn FREQ TUNING dial until the 524D reads gdmegacycles Remove dial knob and slightly loosen screws under knob Slip dial until 3 is directly under the marker on readout win dow Tighten screws and replace knob c Turn FREQ TUNING dial to 10 Adjust C4 designated on internal shield until 10 Me is read on the 524D Check at 5 Me
8. 1 using the input cable BNC to BP and the out put cable internal 50 ohm load 739A 16A OSCILLATOR hp 200SR 9 9 RANGE SELECTOR EXTERNAL OUTPUT ATTENUATOR 3 Set the external oscillator frequency to 400 eycles and the ac voltmeter to 3 volt range Adjust the amplitude of the external oscillator to read 2 85 volts on the ac voltmeter Rotate the METER SET control on the 739AR to its extremities It should vary the meter pointer above and below SET LEVEL FREQUENCY RESPONSE OF THE MONITORING CIRCUIT 5 eps to 300 Kc e 9 10 Remove the ac voltmeter from the test setup in Figure 5 1 and proceed as follows cl ne id TEST SET Set the External Oscillator as follows FEFEQUOENCY e es a 16 400 cps AMPLITUDE 4 CCW b Set 739AR as follows m RANGE SELECTOR External ATTENUATOR 2 68 8 c Disconnect the 739AR output cable and con nect the output of the 729AR tothe input of the 110494 using a short cable terminaled in two BNC connectors Connect the output of the 11049A to the input of the 419A DC Null Voll meter 10 millivolt range e Advance the 2005 AMPLITUDE control for a reading of 6 5 millivolts onthe DC Null Volt meter hp 7 39AR Da FREQUENCY RESPONSE x AC VOLTMETER hp 4038 Figure 5 1 Meter Set Control and Amplitude Check Setup 00203 1 Section V Model 739AR Paragraphs 5 11 to 5 12 and Figure 5 2 DO NOT EXCEED 7 5 MILLIVOLT OUTPUT AS TH
9. 21 North Hills Electric Ca Great Neck LI NY 99848 Wilco Corporation Indianapolis Ind 99934 Renbrandt Inc Boston Mass 99942 Hoffman Semiconductor Div of Hoffman Electronics Corp Evanston Ill 99957 Technology Instruments Corp of Calif Na Hollywood Calif THE FOLLOWING H P VENDORS HAVE NO NUM BER ASSIGNED IN THE LATEST SUPPLEMENT TO THE FEDERAL SUPPLY CODE FOR MANUFACTURERS HANDBOOK 0000 Conner Spring Mfg Ca San Francisco Calif 0000F Malco Tool and Die Los Angeles Calif 0000H Philco Corp Lansdale Division Lansdale Pa 0000 Telefunken c o American Elite New York N Y OO00L Winchester Electronics Inc Santa Monica Calif 0000M Western Coil Div of Automatic Ind Ine Redwood City Calif 0000 NM Mahm Bros Spring Co San Leandro Calif 0000P Ty Car Mfg Co Inc Holliston Mass 60007 Texas Instruments Inc Metals and Controls Div 00006 U Tower Mfg Corp D000Y Imperial Electronics Inc 0000 W Webster Electronics Co Versailles Ky Providence RI Buena Park Calif Inc New York MY D000X Spruce Pine Mica Co Spruce Pine N C 0000Y Midland Mfg Co Inc Kansas City Kans O0 002 Willow Leather Products Corp Newark NJ From F 5 C Handbook Supplements H4 1 Dated April 1961 H4 2 Dated April 1961 00203 2 z Model T3I9AR Section V Paragraphs 5 1 to 5 10 and Figure 5 1 SECTION Y MAINTENANCE 5 1 INTRODUCTION b Set the 739AR controls as follows
10. 5 2 This section contains information necessary for the proper maintenance of the hp Model 739AR Fre quency Response Test Set This section provides Per formance Checks Adjustment and Calibration Pro cedures and Troubleshooting Techniques 5 3 TEST EQUIPMENT REQUIRED 5 4 The test equipment required to perform the operations outlined inthis section is listed in Table 5 1 This table describes the type of instrument required the critical specifications of the instrument the type of operation where the instrument is used and the recommended model If the specific model recom mended is not available equipment which meets or exceeds the critical specifications listed may be sub stituted 5 5 PERFORMANCE CHECKS 9 6 The performance checks are designed to check the Model 739AR against its specifications These checks should be made upon receipt of the instrument following repairsandasa part of periodic maintenance No adjustments should be made internally on the in strument during the performance checks If the in strument fails to meet specifications locate the sec tion of the adjustment and calibration procedure which should correct the discrepancy If this fails refer to the Troubleshooting Procedures 5 7 METER SET CONTROL AND AMPLITUDE CHECK 400 cps 9 8 This procedure uses a 2005 Oscillator a 403B AC Voltmeter and the 739AR Frequency Response Test set a Connect the instruments as shown in Figure 5
11. ATOR ne En Ween 2 ie e AMPLIFIER 3 f RS OUTPUT IM ATTENUATOR 001 3 a o SWITCH POSITONS OF a S1 A B C D E GANGED OUTPUT Q SIL ATTEN Erts J2 RANGE SELECTOR O cioe er UATOR goe OSC FREQ MC O 7 3 i g i L CRI 2030 2030 CR4 2 el R22 R23 OR s E Ee 309 EC Di MI EXTERNAL INPUT dl BNC T4 REFERENCE DESIGNATORS UNASSIGNED ON THIS DRAWING DE SIGNATORS CI THRU C24 RECTIFIER Gs SS OB2 pe VOLTAGE FI REGULATOR RI THRU R27 SIABCDE Sa Vi THRU V5 YRI THRU VR4 Figure 3 Model 739AR Frequency Response Test Set II UOr199S YdV65L TEPON or Model 739AR Section IV SECTION IV REPLACEABLE PARTS This section contains information for ordering re placement parts for the Model 739AR Frequency Re sponse Test Set Table 2 lists replaceable parts in alpha numerical order of their reference designators Detailed infor mation on a part used more than once in the instru ment is listed opposite the first reference designator applying to the part Other reference designators applying to the same part refer to the initial desig nator Miscellaneous parts are included at the end of the list Detailed information includes the following a Reference designator b Full description of the part c Manufacturer of the part in a five digit code see list of manufacturers in appendix d Hewlett Packard stock number e Total quanti
12. E THERMAL CON VERTER IS EASILY DAMAGED f Withthe METERSET control place the METER pointer exactly on SET LEVEL Do not adjust the METER SET control again throughout the remaining portion of this procedure cuit is adjusted at the factory at the OUTPUT terminal of the 739AR If the external output cable 739A 16A or any other long cable is used in calibrating an instru ment at high frequencies this cable should be the input to the Thermal Converter The 50 ohm load of the cable must be removed as the Thermal Converter has a 50 ohm input C16 on the Diode Board may be adjusted for flatness over the entire range 0 3 Me to 10 Mc See Paragraph 5 29 Replacethe 50 ohm load in cable after calibration is completed g Connect the opposing voltage supply tothe 419A DC Null Voltmeter as shown in Figure 5 2 Components are listed in Table 5 1 designated null system h Withthe 739AR METER pointer onSET LEVEL adjust the Opposing Power Supply for a null a Set the 739AR controls as follows or zero reading on om 4194 Decrease the RANGE Selector 0 3 to 1 Mc range continuing adjustment until a zero read FREQ TUNING 3 ing on the 100 microvolt range is reached AMPLITUDE CCW j Sweep the frequency 5 cps to 300 Ke adjusting ATTENUATOR 4 3 the 2005 amplitude at each frequency until the TIGAR METER pointer is exactly on SET b Disconnect the 739AR output cable and con LEVEL From5 to 10 cps the DC Null
13. HP Archive This vintage Hewlett Packard document was preserved and distributed by www hparchive com _ Please visit us on the web Thanks to on line curator Kenneth Kuhn for supplying and scanning this vintage document i 739A 739 AR FREQUENCY RESPONSE TEST SET uvecz y OPERATING AND SERVICE MANUAL MODEL 739AR SERIALS PREFIXED 010 FREQUENCY RESPONSE TEST SET Copyright HEWLETT PACKARD COMPANY 1959 1501 PAGE MILL ROAD PALO ALTO CALIFORNIA U S A 00203 2 Printed NOV 1961 Section Model 739AR Figure 1 Model 739AR Frequency Response Test Set 1 0 00203 2 Model 739AR Section I SECTION I DESCRIPTION The Model 739AR Frequency Response Test Set simplifies frequency response determination by pro viding a convenient constant amplitude reference voltage of variable frequency Frequency response of vacuum tube voltmeters oscilloscopes video am plifiers and filters from 5 cps to 10 mc extended frequency range when used with d Model 200S Oscil lator can be quickly and easily checked The Frequency Response Test Set contains a wide range oscillator special voltmeter and step attenu ator as shown in figure 2 The oscillator generates constant amplitude signals between 300 kc and 10 mc The monitoring circuit is flat from 5 cps to 10 mc so that an external oscillator such as Model 2008 can be used to reduce the lower frequency limit to as low as 5 cps Os
14. NUATOR 3 c Adjust the 739AR AMPLITUDE control for a 0 9 volt reading on the top scale of the 403B when on the 3 volt ranve Use this as a ref erence point Max amplitude is 3 vor above d Rotate ATTENUATOR switch tol volt and the a ac voltmeter to 1 volt range Theac voltmeter should read 0 9 65 on the top scale e Repeatstepd for all ATTENUATOR positions tothe 0 001 placing the 400H inthe same range asthe attenuator marking The ac voltmeter should read 0 9 65 on the top scale for each setting 5 18 ADJUSTMENT AND CALIBRATION PROCEDURES 9 19 The following isacomplete adjustment and cal bration procedure for the Model 739AR Frequency Response Tesi Set and should be performed only if it J has previously been established that the 739AR does not meet spec ifications If the following operations donot rectify any error which exists and all the con zl nections and operations have been checked refer to the troubleshooting procedures Paragraph 5 32 5 20 MECHANICAL METER ZERO ADJUSTMENT 5 21 The mechanical meter zero adjustment must be a Turn instrument on and allow 20 minutes for the veter movement to reach its operating temperature e Remove power from the instrument and allow 30 seconds to elapse before proceeding with acest step er anical gero adjustment serew clo Wi ere pointer is toleft of zero ER moving up scale t GR ds zero ab L Continue torotate dh mel rewe
15. acitor fixed titanium dioxide 1 pf 10 500 vdcw Optimum value selected at factory Average value shown Same as C5 Capacitor electrolytic 2 sections 20 uf sect 450 vdew Same as C5 Diode germanium Diode silicon Lamp miniature 2 pin base 12 Fuse 1 amp slow blow for 115 V operation Fuse 1 2 amp slow blow for 230 V Operation Connector part of Ext Input Cable Connector part of Output Cable Inductor RF 10 uh 10 Meter Cable power Resistor fixed composition 33 ohms 10 1 W Resistor fixed composition 1000 ohms 10 1 W Resistor fixed composition 1000 ohms 10 1 2 W Resistor fixed composition 68 000 ohms 10 1 W 16433 72982 82142 96289 13293 13293 24455 71400 71400 99848 65092 70903 01121 01121 01121 01121 0140 0010 0132 0002 0150 0029 0180 0012 1910 0011 1901 0027 2140 0012 2110 0007 2110 0008 9140 0032 1120 0091 8120 0015 0690 3301 0690 1021 0687 1021 0690 6831 See introduction to this section Model 739AR Model 739AR Rod R6 Hi R8 R9 R10 Ril R12 R13 R14 R15 R16 R17 R18 19 R20 21 R22 R23 R24 25 R26 27 S1 S2 00203 2 Table 2 Replaceable Parts Continued Resistor fixed composition 1 megohm 10 1 2 W Resistor fixed deposited carbon 667 000 ohms 1 1 2 W Resistor fixed c
16. ard such as the Model 738A Voltmeter Calibrator This voltage standard should have an output frequency between 100 and 1000 cps a Connect the device under test to the Frequency Response Test Set OUTPUT connector using the spe cial terminated output cable provided b Connect a suitable oscillator such as the Model 200S Oscillator to the EXTERNAL INPUT connector on the Frequency Response Test Set c Set the external oscillator to the frequency used for calibration d Set the RANGE SELECTOR to EXTERNAL Set a reference on the device under test using the external oscillator AMPLITUDE control and the OUTPUT AT TENUATOR of the test set NOTE Always use the OUTPUT ATTENUA TOR range that corresponds to the desired in put to the device under test This will assure a test set meter indication nearSET LEVEL e Set the meter in the test set toSET LEVEL with the METER SET control f Shift to any other frequency within the range of the test set or external oscillator Return the meter to SET LEVEL using the oscillator AMPLITUDE con trol Note any deviation from the reference set in step d on the device under test g Repeat steps c through f if you change the range switch on the device under test Repeat stepf for all frequencies you desire to check SECTION Ill MAINTENANCE The internal oscillator is a single pentode V2 located inside the shield on top of the chassis The oscillator plate and screen voltages are
17. cillator output is applied to the monitoring voltmeter which samples the input to a step attenuator An arbitrary reference level is maintained on the monitoring meter as the frequency setting is varied The attenuator reduces the signal to an appropriate output level which appears across 50 ohms at the end of the special output cable supplied INT OSC 30 10 MC 0 10db ATTEN l0db STEPS METER SET OUTPUT MONITOR METER EXT INPUT Scps JOOKC Figure 2 Model 739AR Block Diagram Table 1 Specifications FREQUENCY RANGE 300 ke to 10 mcin 3 ranges 5 cycles to 10 me with Model 200SR Oscillator REQUIREMENTS FOR EXTERNAL OSCILLATOR 3 volts into 50 ohms 5 cps to 300 kc distortion less than 1 FREQUENCY RESPONSE OF MONITORING CIR CUIT Flat within 0 5 from 10 cps to 5 mc within 0 5 1 5 5 cps to 10 mc Monitor circuit is average reading OUTPUT At least 3 volts across 50 ohm cable termination Adjustable in 10 db steps by a 0 to 70 db attenuator Fine adjustment provided POWER 115 or 230 volts 10 50 to 1000 cps 30 watts WEIGHT Net 14 1b shipping 28 Ib 00203 2 DIMENSIONS Rack Mount ACCESSORIES FURNISHED 739A 16A 30 inch Output Cable 50 ohm termination BNC to shielded dual banana plug extra cables available on special order i 171 2 Model 739AR Sections Il and III SECTION II OPERATION Calibrate the device under test with an accurate volt age stand
18. co Galif Good All Electric Mfg Co Ogallala Neb Sarkes Tarzian Inc Bloomington Ind Boonton Molding Company R M Bracamonte amp Co San Francisco Calif Kolled Kords Inc New Haven Conn Seamless Rubber Co Chicago lil Radio Corp of America RCA Electron Tube Div Harrison Na Western Fibrous Glass Products Co San Francisco Calif Cutler Hammer Inc Lincoln Ill General Electric Distributing Corp Schenectady NY U S Rubber Co Mechanical Goods Div Passaic NJ Bearing Engineering Co San Francisco Calif Radio Materials Co Chicago Ill Augat Brothers Inc Attleboro Mass Dale Products Inc Columbus Neb Elco Corp Philadelphla Pa Gremar Mfg Co Inc Wakefield Mass K F Development Co Redwood City Calif Micro Switch Div of Minneapolis Honeywell Regulator Co Universal Metal Products Inc Bassett Puente Calif Sylvania Electric Prod Ine Semiconductor Div Robbins and Myers Inc New York N Y Stevens Mfg Co Inc Mansfield Ohio Insuline Van Norman Ind Inc Electronic Division Manchester N H Raytheon Mfg Co Receiving Tube Div Raytheon Mfg Co Semi conductor Div Newton Mass Scientific Radio Products Inc Loveland Colo Newark NJ Electronics Div Carlstadt NJ Tru Ohm Prod Div of Medal Engineering and Mfg Co Chicago Ill Worcester Pressed Aluminum Corp Worcester Mass Miami Fla Freeport I Woburn Mass Quincy Mass Tung Sol Electric Inc C
19. controlled by a series regulator triode V1 This series regulator is con trolled by a two stage differential amplifier V3 and V4 that senses the amplitude of the voltage applied to the OUTPUT ATTENUATOR The combined action of the series regulator differential amplifier and out put amplitude sensing circuits keeps the output con stant over the range of the internal oscillator The power supply circuit is conventional using glow 00203 2 discharge tubes to regulate the differential amplifier voltages Tube element voltages are not listed on the schematic diagram since they vary radically with fre quency and output AMPLITUDE control setting The only adjustments in the oscillator circuit are for initial dial calibration and should not need further attention Another adjustment C16 is provided in the meter circuit This meter frequency response adjustment should not be touched unless you have ac curate means of checking the accuracy of the reference meter between 7 and 10 mc Uy N i CE Z 0700 COPYRIGHT 1959 BY HEWLETT PACKARD COMPANY 340V This drawing is intended for the operation Ve E ond maintenance of Hewlett Packard equip O R6 RII ment and ia not to be uted otherwise or 3 667K 667K reproduced without written consent of the VI R3 Hawlatt Patkord Company 6 Pe ER 6C4 1000 DIFFERENTIAL SERIES AMPUFIER eae REGULATOR E L Ca Gi Gi 4 A Ve l 6AQ5 V4 e OSCILL
20. d shee Pos Supply at the junction of R6 Da ek RIC AE Grids of V4 pin 2 pin7 Cathodes of V4 pin 3 pin 8 A Plates of V4 pin 1 pin 6 Cathodes of V3 pin 3 pin 8 Output plate of V3 pin 1 Advance amplitude to get 250 volts 00203 1 0 3 to 1 Mc fully CCW Approximate Voltages 250 y 250 v Ov 1 y 90 v 54 y 5 Lo 250 v C23 VRI Tis RT 8 is R6 9 is R12 Section V Paragraphs 5 35 to 5 37 and Figure 5 3 OUT PUT ATTENUATOR DIODE BOARD T4 CRS R26 VR4 C24 R27 VS C2 Co 10 is R18 13 is R19 11 is C15 12 is C12 Bottom View 9 36 OSCILLATOR AND DC AMPLIFIER ISOLATION OF TROUBLES dl No range operates Check cathode voltage of V1 pin 7 100 volts 1 If over 100 volts Check tuning capacitor for short be tween stator and rotor and for 150 volts 2 If under 100 volts Check plate pin 5 of V1 operating voltage 300 v If OK pull Vi tube and check grid voltage pin 6 If less than 100 v amplitude cw the trouble is inthe DC Amplifier Use voltage checks in Paragraph 5 35 b One range does not operate Check for open plate coil for that range tickler coil or trimmer capacitor 5 37 METER SET CONTROL MALFUNCTION a Control does not vary meter pointer Check b R22 Control does not vary meter pointer above and below SET LEVEL 2 85 volts applied Change ohmic size of R23 if R22 will not adjust enough
21. for instructions Give full details of the difficulty and include the instrument model and serial numbers Service data or shipping instructions will be promptly sent to you There will be no charge for repair of instruments under warranty except transportation charges Estimates of charges for non warranty or other service work will always be supplied if requested before work begins CLAIM FOR DAMAGE IN SHIPMENT Your instrument should be inspected and tested as soon as it is received The instrument is insured for safe delivery If the instrument is damaged in any way or fails to operate properly file a claim with the carrier or if insured separately with the insurance company SHIPPING On receipt of shipping instructions forward the instrument prepaid to the destination indicated You may use the original shipping carton or any strong container Wrap the instrument in heavy paper or a plastic bag and surround it with three or four inches of shock absorbing material to cushion it firmly and prevent movement inside the container GENERAL Your authorized 4 Sales Representative is ready to assist you in any situation and you are always wel come to get directly in touch with Hewlett Packard service departments CUSTOMER SERVICE OR In Western Europe Hewlett Packard Company Hewlett Packard S A 395 Page Mill Road Rue du Vieux Billard No 1 i Palo Alto California U S A Geneva Switzerland Telephone DAvenport 6 1755 Telep
22. hone 022 26 43 36 Direct Dial Area Code 415 Cable HEWPACKSA TWX No PAL AL 117 U Cable HEWPACK 4 A 00390 1 ale ee V Gp MANUAL CHANGES MODEL 7394 FREQUENCY RESPONSE TEST SET Manual Serial Prefixed 0i0 Manual Printed 12 60 To adapt this manual to instruments with other serial prefixes check for errata below and make changes shown in tables Instrument Serial Prefix Make Manual Changes Instrument Serial Prefix Make Manual Changes CHANGE 1 R4 Change to 82K D Stock No 0687 8230 10 23 62 BD dd MANUAL CHANGES FREQUENCY RESPONSE TEST SET Manual Serial Prefixed 010 Manual Printed 12 60 To adapt this manual to instruments with other serial prefixes check for errata below and make changes shown in tables Instrument Serial Prefix ERRATA Table of Replaceable Parts CR3 4 Change Stock No to 1901 0027 SRI Change description to read Rectifier selenium 192V rms max 25 ma de max Table of Replaceable Parts under MISCELLANEOUS Fuseholder Change Stock No to 1400 0084 CHANGE 1 Table of Replaceable Parts under MISCELLANEOUS Attenuator Assembly Change Stock No to 739A 34 2 19 65 Supplement for 739A 900
23. ie Pa C W Marwedel San Francisco Calif Micamold Electronic Mfg Corp Brooklyn N Y Malden Mass San Leandro Calif Cleveland Ohio Chicago III James Millen Mfg Co Inc Monadnock Mills Mueller Electric Co Oak Manufacturing Co Bendix Corp Bendix Pacific Div No Hollywood Calif Phaostron Instrument and Electronic Ca South Pasadena Calif Potter and Brumfield Inc Princeton Ind Radio Condenser Co Camden N J Radio Essentials Inc ME Vernon N Y Radio Recaptor Co Inc Brooklyn M Y Resistance Products Co Harrisburg Pa Signal Indicator Corp Mew York N Y Tilley Mfg Co San Francisco Gailf Stackpole Carbon Co St Marys Pa Tinnerman Products Inc Cleveland Ohio Transformer Engineers Pasadena Calif Ucinite Co Newtonville Mass Veeder Root Inc Hartford Conn Wenco Mfg Co Chicago Ill Zierick Mfg Corp New Rochelle N Y Mepco Division of Sessions Clock Co Morristown NL Times Facsimile Corp New York N Y Electronic Industries Association Any brand tube meeting EIA Standards Washington DC Unimax Switch Div of wW L Maxson Corp Oxford Electric Corp Acro Manufacturing Co All Star Products Inc Hammerlund Co Ine Stevens Arnold Co Inc international Instruments Inc New Haven Conn Wilkor Products Inc Cleveland Ohio Raytheon Mfg Co Industrial Tube Division International Rectifier Corp El Segundo Calif Watertown Mass Wallingfo
24. ient range for flattening the g the capacitive value of C17 d Check the deviation from zer voltmeter from 0 3 to 10 Me meter pointer onSET LEVEL should not be more than 82 mic 0 3to5 Mc and 82 microvolts and volts from 5 Me to 10 Mc 5 30 FREQUENCY RESPONSE MONITORING CIR 5 31 There is no additional adjustment for the Fre quency Response Monitoring Cireuit If out of speci ications after adiustment Paragraph 5 29 try changi tubes then repeat adjustment Paragraph 5 29 5 32 TROUBLESHOOTING PROCEDURES 9 33 This section contains procedures designed assist in the isolation of malfunctions These oper tions should be undertaken only after it is insure that the difficulty cannot be eliminated by the Adjus ment and Calibration Procedures 9 34 POWER SUPPLY VOLTAGE CHECKS de Unregulated voltage 325 ta 375 volts pin 7 of V5 325 to 375 volts in sulated can of C21 002034 Model TIGAR om RIS 2 Anan 80 VI R2 R3 C9 va V4 VRS VRe A Resistor Board 1 is R10 2 is R9 3 is R13 4 is R14 gt is R8 6 is R11 Figure 5 3 b Regulated voltage 240 to 260 volts pin 1 of VRI 240 to 260 volts pin T of VR4 c Ripple on regulated supply should be lessthan 35 millivolts 9 35 DC AMPLIFIER VOLTAGE CHECKS Under the following conditions V1 6C4 out of socket RANGE Selector AMPLITUDE 55 4 Neg Supply at the junction of R9 R10 R13 Sk Fe
25. in Fig ure 5 2using the opposing voltage supply from components listedin Table 5 1 designated for null system f With the 739AR output meter on SET LEVEL adjust the Opposing Power Supply apa j for a null or zero reading on the 419A De z crease the range continuing adjustment until a zero reading on the 100 microvolt range is reached g Slowly sweepthe frequency of the 739AR from 0 3 Mce to 5 Mc readjusting the T39AR AMPLI TUDE control at each frequency reading until the 739AR output METER has its pointer exactly on the reference line The 419A should not deviate more than a 82 microvolts Sixty microvolt deviation corresponds to 0 5 of rms voltage Considering the 0 2 accuracy of the 110494 Thermal Converter this allows a deviation of 82 microvolts h Repeat step g using frequencies from 5 Mc to 10Mc The deviation may be from 82 micro volts to 204 microvolts 5 13 FREQUENCY RESPONSE OF THE INTERNAL OSCILLATOR MONITORING CIRCUIT 1 volt 9 14 This isfor approximately 1 volt output using the hp Model 11050A Thermal Converter Follow pro cedure in Paragraph 5 12 steps a through h except for placing the 739AR ATTENUATOR to 1 volt and using the 11050A Thermal Converter in place of the 11049A 9 19 FREQUENCY ACCURACY CHECK 9 16 This is not a specification for the 739AR It may be performed if frequency accuracy is desired Adjustment procedures are located in Paragraphs 5 24 through 5 28
26. k N Y Hi Q Division of Aerovox Myrtle Beach SC Elgin National Watch Co Electronics Division Burbank Calif Dymec Division of Hewlett Packard Co Special Tube Operations of Sylvania Electronic KE ountain View Calif Motorola Inc Semiconductor Prod Div Phoenix Arizona Filtron Go Inc Western Division Automatic Electric Co Twentieth Century Plastics inc Los Angeles Calif Westinghouse Electric Corp Semi Conductor Dept IHumitronic Engineering Co Palo Alto Calif Culver City Calif Northlake Ill Youngwood Pa Sunnyvale Calif Barber Colman Co Rockford III Metropolitan Telecommunications Corp Metro Cap Div Stewart Engineering Co Soquel Calif The Bassick Co Bridgeport Conn Beede Electrical Instrument Co Inc Penacook N H Torrington Mfg Co West Div Van Nuys Calif Corning Glass Works Elactronic Components Dept Bradford Pa 00015 14 Revised 20 September 1961 00203 2 Brooklyn N Y CODE NO 07126 07137 07138 07241 07263 07916 07933 07980 08145 08358 08717 08718 08792 090264 09134 09250 OFS 69 10411 10646 112364 11237 11312 11870 12697 14455 15909 16758 18873 19315 19500 193701 20183 21520 1345 21964 24446 24455 24655 26462 26992 28480 33173 35434 37942 39543 40920 42190 43990 44655 47904 MANUFACTURER ADDRESS Digitran Co Pasadena Calif Transistor Electronics Corp Mi
27. meter must not vary more than 82 microvolts or 204 microvolts From 10 cps to 300 Kc the DC Nullmeter must not vary more than 82 microvolts Sixty microvolts corresponds to nect the output of the 739AR to the input of the 11049A Thermal Converter using a short cable terminated in two BNC jack connectors Connect the output of the 11049A to the input of the hp Model 419A DC Null Voltmeter Se n 0 5 rms voltage Considering the 0 2 accuracy of the Thermal Converter this al lows a variation of the above values c Advance the 739AR AMPLITUDE control until the 419A reads 6 5 millivolts output Use METER SET control to set marker exactiy on SET LEVEL DO NOT EXCEED 7 5 MILLI VOLTOUTPUT AS THE THERMAL CONVERTER IS EASILY DAMAGED 10 millivolt range 9 11 FREQUENCY RESPONSE OF THE INTERNAL OSCILLATOR MONITORING CIRCUIT 3 volts 0 12 This is for approximately 3 volt output using the hp Model 11049A Thermal Converter NOTE The Frequency Response of In ternal Oscillator Monitoring Cir hp 739AR OPPOSING FREQUENCY RESPONSE VOLTAGE SUPPLY EST SET i A eee n me DC NULL IS RK 1 VOLTMETER THERMAL CONVERTER A D Lo Fagan HO i Ls Figure 9 2 Frequency Response of the Monitoring Circuit 9 2 00203 1 ki Mode 739AR C d Donot readjust the METER SET control through gt out the remaining portion of this procedure e Connect the instruments as shown
28. nneapolis Minn Westinghouse Electric Corp Electronic Tube Div Elmira N Y Avnet Corp Los Angeles Calif Fairchild Semiconductor Corp Mountain View Calif Continental Device Corp Hawthorne Calif Rheem Semiconductor Corp Mountain View Calif Boonton N J Los Angeles Calif Boonton Radia Corp U S Engineering Co Burgess Battery Co Niagara Falls Ontario Canada Sloan Company Burbank Calif Gannon Electric Co Phoenix Div CBS Electronics Semiconductor Operations Div of B S Inc Lowall Mass Costa Mesa Calif Houston Taxas Chicago III Phoenix Ariz Babcock Relays Inc Texas Capacitor Co Electro Assemblies Inc Mallory Battery Co of Canada Ltd Toronto Ontario Canada Ti Tal Inc Berkeley Calif Carborundum Co Niagara Falls N Y CTS of Berne Inc Berne Ind Chicago Telephone of California Inc So Pasadena Calif Microwave Electronics Corp Palo Alto Calif Palo Alto Calif Dover N H Melabs Inc Clarostat Mfg Co Cornell Dubilier Elec Corp So Plainfield N J The Daven Co Livingston N J Delco Radio Div of G M Corp Kokomo Ind E DuPont and Co Inc Wilmington Del Eclipse Pioneer Div of Bendix Aviation Carp Thomas A Edison Industries Div of McGraw Edison Co West Orange N J Electra Manufacturing Co Kansas City Mo Electronic Tube Corp Philadelphia Pa Fansteel Metallurgical Corp No Chicago lil The Fafnir Bearing Co Mew Britain
29. omposition 470 000 ohms 10 1 2 W Resistor fixed deposited carbon 4 megohms 1 1 2 W Resistor fixed deposited carbon 5 55 megohms 1 1 2 W Resistor fixed composition 220 000 ohms 5 1 2 W Same as R6 Same as R8 Same as R9 Resistor fixed deposited carbon 600 000 ohms 1 1 2 W Resistor fixed deposited carbon 2 megohms 1 1 2 W Resistor variable composition 100 000 ohms linear taper Resistor fixed composition 47 000 ohms 10 1 2 W Resistor fixed composition 1 megohm 10 1 2 W Resistor fixed deposited carbon 5030 ohms 1 1 2 W Resistor variable composition linear taper 500 ohms 10 Resistor fixed deposited carbon 300 ohms 1 1 2 W Optimum value selected at factory Average value shown Resistor fixed deposited carbon 201 ohms 1 1 2 W Resistor fixed composition 12 000 ohms 10 2 W Switch rotary 2 sect 4 pos Switch toggle SPST 250 V 3 amp 0687 1051 0727 0249 0687 4741 0727 0298 0727 0300 0686 2245 0727 0246 0727 0287 2100 0063 0687 4731 0687 1051 0727 0136 2100 0019 0727 0065 0727 0055 0693 1231 3100 0085 3101 0001 See introduction to this section Section IV z 4 3 Section IV SR1 Ti T2 T3 T4 4 4 Table 2 Replaceable Parts Continued Rectifier metal 162 V rms max 20 ma de max Transformer RF Transformer RF Transformer RF Transfo
30. rd Cann Chicago Ill Columbus Ohio Defiance Ghia New York N Y Boston Mass Quincy Mass Barry Controls Inc Carter Parts Co Skokie Ill Jeffers Electronics Division of Speer Carbon Co Du Bois Pa Allen B DuMont Labs Inc Clifton N J Maguire Industries Inc Greenwich Conn Sylvania Electric Prod Ine Electronic Tube Div Astron Co Emporium Pa East Newark N J 00015 16 Revised 20 September 1941 CODE NO 52389 B1647 8206566 82977 82893 83148 831865 83278 81594 83777 831821 g4171 841398 84411 84970 85454 85474 85640 85911 86684 87473 88140 89473 90179 90970 91418 71506 91637 91562 91737 91827 31929 721976 734932 93369 93410 93983 94144 94145 74148 94154 94197 54310 14682 95236 75238 95783 95154 95265 25278 MANUFACTURER Switchcraft Ine Texas Instruments Inc Metals and Controls Div Spencer Products Research Products Corp ADDRESS Chicago Hl Attlebora Mass Madison Wis Rotron Manufacturing Co Inc Woodstock N Y Glendale Calif Los Angeles Calif Union MJ Red Bank MJ Vector Electronic Co Electra Cords Co Victory Engineering Corp Bendix Corp Red Bank Div Burroughs Corp Electronic Tube Div Model Eng and Mfg Inc Plainfield N J Huntington Ind Festus Mo Mew York MLY Loyd Scruggs Co Arco Electronics Inc A J Glesener Co Inc San Francis
31. rmer power Tube electron 6C4 Tube electron 6AQ5 Tube electron 12AX7 Tube electron 6X4 Tube electron voltage regulator OA2 Tube electron voltage regulator OB2 Same as VRI MISCELLANEOUS Attenuator assembly Cable assembly Ext Input Cable assembly Output Fuseholder extractor post type Knob METER SET Knob AMPLITUDE Knob RANGE SELECTOR OUTPUT ATTENUATOR 77638 28480 28480 28480 28480 28480 28480 15915 28480 28480 28480 1883 0005 739A 60A 139A 60B 139A 60C 9100 0027 1921 0005 1923 0018 1932 0030 1930 0016 1940 0004 1940 0007 1394 34 7394 16B T39A 16A 1400 0084 G 74C G T4F G T4N See introduction to this section Model 739AR 00203 2 Model 739AR APPENDIX Appendix CODE LIST OF MANUFACTURERS Sheet 1 of 2 The following code numbers are from the Federal Supply Code for Manufacturers Cataloging Handbooks H4 1 Name to Code and H4 2 Code to Name and their latest 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 H4 handbooks CODE NO 00334 00335 00373 00555 00779 00781 00853 008665 00891 01121 01255 01281 01295 01349 01561 091930 01961 02114 02286 02650 02735 02771 02777 03508 03705 03797 03877 03888 03954 04009 04062 04222 04298 04404
32. s Div of Hughes Aircraff Co Newport Beach Calif Amperex Electronic Go Div of North American Phillips Co Inc Hicksville N Y Bradley Semiconductor Corp New Haven Conn Hartford Conn Fullerton Calif Carling Electric Inc George K Garrett Co Inc Philadelphia Pe Cincinnati Ohio Elyria Ohio Fischer Special Mfg Co Tha General Industries Co From F S C Handbook Supplements H4 1 Dated April 1961 H4 2 Dated April 196 Appendix CODE NO 73905 74455 74851 74858 74970 75042 75173 75378 75382 75818 75915 74005 74210 76433 74487 75530 76545 76854 77068 77221 77342 77630 77634 77638 77764 78283 78471 78488 18553 78790 78947 79142 79251 79953 BO0011 g0130 80131 80207 80248 80411 80484 80583 80640 81030 81415 81453 81483 818650 82042 82142 82170 82209 82119 82374 APPENDIX Model 739AR CODE LIST OF MANUFACTURERS Sheet 2 of 2 MANUFACTURER Jennings Radio Mfg Co J H Winns and Sons Industrial Condenser Corp Industrial Products Co E F Johnson Co International Resistance Co Philadelphia Pa Jones Howard B Division of Cinch Mfg Corp James Knights Co Kulka Electric Mfg Co Ine ME Vernon N Y ADDRESS San Jose Calif Winchester Mass Chicago IN Danbury Conn Waseca Minn Chicago Ill Sandwich III Lenz Electric Mfg Co Chicago Ill Littelfuse Inc Des Plaines MI Lord Mfg Co Er
33. ty used in the instrument TQ col f Recommended spare quantity for complete main tenance during one year of isolated service RS cal Table 2 To order a replacement part address order or inquiry either toryour authorized Hewlett Packard sales rep resentative or to CUSTOMER SERVICE Hewlett Packard Company 395 Page Mill Road Palo Alto California or in Western Europe to Hewlett Packard S A Rue du Vieux Billard No 1 Geneva Switzerland Specify the following information for each part a Model and complete serial number of instrument b Hewlett Packard stock number c Circuit reference designator d Description To order a part not listed in table 2 give a complete description of the part and include its function and location Replaceable Parts Capacitor variable air dielectric 2 section 9 5 443 2 pf Capacitor variable ceramic 7 45 pf 500 vdew 1 5 7 pf 500 vdcw Capacitor fixed ceramic 01 uf 20 1000 vdcw Capacitor fixed ceramic 1000 pf 25 500 vdcw Same as C5 Capacitor fixed mica 100 pf 5 500 vdew Same as C5 00203 2 Capacitor variable ceramic 1 section 0121 0026 0130 0001 0130 0003 0150 0012 0150 0005 0140 0041 Section IV C18 19 C20 21 C22 23 24 CR1 2 4 2 Table 2 Replaceable Parts Continued Capacitor fixed mica 820 pf 10 500 vdcw Capacitor variable polystyrene 0 7 3 pf 350 vdcw Cap
34. urtiss Wright Corp Allies Products Corp Continental Connector Corp Woodside N Y New York N Y Burbank Calif Sheridan Wyo Bridgeport Conn Leecraft Mfg Co Inc Lerco Electronics Inc National Coil Ca Vitramon Inc Boonton M J CODE NO MANUFACTURER ADDRESS 95354 Methode Mfg Co Chicago Ill 95987 Weckesser Co Chicago Ill 940487 Huggins Laboratories Sunnyvale Calif 95095 Hi Q Division of Aerovox Olean M Y 96296 Solar Manufacturing Co Los Angeles Calif 96310 Carlton Screw Co Chicago III 96347 Microwave Associates Inc Burlington Mass 96493 J W Miller Co Los Angeles Calif 95501 Excel Transformer Co Oakland Calif 97539 Automatic and Precision Mfg Co Yonkers N Y 97956 CBS Electronics Div of CRS Inc Danvers Mass 98141 Axel Brothers Inc Jamaica N Y 98220 Francis L Mosley Pasadena Calif 98278 Micradat Inc So Pasadena Calif 98291 Sealectro Corp Mew Rochelle M Y 98405 Carad Corp Redwood City Galif 98734 Palo Alto Engineering Co Ine Palo Alto Calif 98925 Clevite Transistor Prod Div of Clevite Corp Waltham Mass 58978 International Electronic Research Corp Burbank Calif 99109 Columbia Technical Corp New York N Y 99313 Varian Associates Palo Alto Calif 79515 Marshall Industries Electron Products Division Pasadena Calif 99707 Cantral Switch Division Controls Co of America El Segundo Calif 99800 Delevan Electronics Corp East Aurora N Y 998
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