HP 467A Operating And Service Manual

Power amplifier/supply
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  • Page 1 Web: 1 - 84 Broadway St. West; Nakusp, BC; V0G 1R0 https: // pearl - hifi . com Land: + 250. Mobile: + 587.578.4434 e-Mail: sales@ pearl - hifi.com 8888 Inc. Perkins Electro-Acoustic Research Lab, Inc. Engineering and Intuition Lovingly Serving the Soul of Music Please note that the links in the P logotype above are live and can be used to direct EARL...
  • Page 2 Verso Filler Page ♦ ♦...
  • Page 3 OPE RAT I NG AN D S E R V ICE MAN U A L POWER AMPLIFIER/SUPPLY 467A 467A POWER AMPLIfiER HEwLETT PACKARD VAR. GAIN AMPLIFIER SUPPLY VOLTS AOJ. ±I LINE · INPUT ZERO OUTPUT PACKARD...
  • Page 4 CE RTI FI CATION 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.
  • Page 5 OPERATING SERVICE MANUAL (HP PART 00467-90003) MODEL 467A POWER AMPLIFIER/SUPPLY SERIALS PREFIXED: 444- Printed AUG 1969 Copyright Hewlett-Packard Company 1965 P.D. Box 301, Loveland, Colorado, 80537 U.S.A.
  • Page 7: Table Of Contents

    LIST OF ILLUSTRATIONS Number Page Number Page 1-1. Model 467A Power Amplifier / Supply 5 -5. Current Limit Check ..5- 6 3-1. Front Panel Controls, Indicators and 5-6. Balance Adjust .... .
  • Page 8 Model 467A Section I 467 A POW ER AMP UFI ER 'A CI( AAO LE TT VA R. G AIN V OL TS AD J. LIN E O UT P UT ZE R O 1-1. Figure Model A Power Amplifier ISupply 1-1.
  • Page 9: General Information

    Input and output connectors are provided at the front and rear of the instrument. The amplifier is a three 1-2. The solid state 467A Power Amplifier / Supply terminal device isolated from chassis and may be is a 10 watt peak power amplifier and -20 to +20 volt floated up to 200 volts dc above chassis ground.
  • Page 10 Section Model 467A Notes 1- 2...
  • Page 11: Installation

    Appendix B for office locations. ) INSTALLATION. 2-3. 2-4. The Model 467A is a submodular unit that can If the instrument is to be shipped be mounted on a bench, or in a rack or cabinet. It is to Hewlett-Packard for service shipped with plastic feet and tilt stand in place.
  • Page 12 Model 467A Secti o n II Notes...
  • Page 13: Operating Instructions

    II I OPERAT IN G IN STRUCTIONS GENERAL. 3-1. Connect DC Voltmeter ( - hp - ModeI4 12A) to the 467A OUTPUT terminals; adjust the ZERO control to obtain a zero dc output. 3-2. The Model 467A Power Amplifier/Supply can be operated as a power amplifier or a power supply.
  • Page 14: Front Panel Controls, Indicators And Connectors

    ±l, ±2, pensation for dc offset, or unbalance, with no ±4, ±lO, or ±20 volts. signal applied to the 467A IN PUT terminals. VAR GAIN/ VOLTS ADJ.: operates in conjunc­ OUTPUT: banana-type connectors that provide tion with AMPLIFIER/ SU P PLY control to pro­...
  • Page 15 This fuse is used for both 115 v and 230 v operation. Power Connector: accepts a 3-wire power cable with safety ground. Line Voltage: a two-position slide switch; sets the 467A for 115 or 230 volt operation. Figure 3-2. Rear Panel Controls and Connectors...
  • Page 16: Simplified Block Diagram

    � o· RI30 -FEEDBACK ..<: ?-< CI22 RI29 -FEEDBACK CII5 RII9 RI20 RI21 (010 1) (03,04,0107) - 7V ATTENUATOR 1 " ;;y< = "'" (0102,0103) (0104 ) (0105) RI44 (0108,0109 (01,02,0106) AND 0110) -FEEDBACK BALANCE A RI47 CI24 DC GAIN CONTROL ---- - SIGNAL PATH...
  • Page 17: Theory Of Operation

    The Model 467A Amplifier circuits include a 4-10. The fol l owing paragraphs give a detailed descrip­ high frequency ampl ifier. a l ow frequency amplifier. tion of the Model 467A Ampl ifier circuits. Refer to a two-stage differential amplifier. a driver ampl ifier.
  • Page 18: Voltage Amplifier

    4-32. The diode regulated reference supply (refer to Figure 5-14)provides +7, -7, +15 and -15 voltages. 4-24. The external load connected to the 467A is pro­ Capacitors C126 and C128 filter the ac voltages. tected during turn-on and turn-off, from current surges Breakdown diodes CR146 and CR147 maintain a +15 and voltage transients, by relay Kl.
  • Page 19 Model 467A Section II Notes...
  • Page 20: Specifications

    -hp- Part No. 0727-0445 Performance Checks 0811-0297 12 ohms ± 1 2 watt -hp- Part No. 600 ohms ± 1 2 watt Performance Checks -hp- Part No. 0727- 0081 Calibration Filter Bandpass: 1 KHz Distortion Check White Instrument Lab. Bandwidth: 2645-1K...
  • Page 21: Test Equipment Required

    1. OOOV ±O. 3%. This table describes the type of instrument required, g. Set the 467A to VAR.; rotate the VAR. GAIN critical specifications, type of operation to be con­ from fully CCW to fully CW. The 467A out­...
  • Page 22: Ac Calibration And Gain Check

    Table 5-2. For each measurement, con­ nect the ac voltmeter first to the INPUT of d. Set Model 467A to AMPLIFIER XlO. the 467 A and adjust for 000 V. Then con­ e. Set test oscillator frequency to 400 Hz. Ad­...
  • Page 23: Parts For Figure 5-3B

    5-3A Alternate connection. 651B and the 331A. Distortion added by the c. Set the oscillator frequency to 1 KHz. Adjust 467A at 100 KHz should be less than 1% (40 the output amplitude for the 1. 0 volt output. dB down) .
  • Page 24: Dc Power Supply Operation

    5 -3B. Set the oscillator frequency to 1 MHz. ing should remain within 10 mV of reading ob­ k. Adjust the oscillator output for 10 V at the 467A tained in d above. The load is from 0 to O. 5 A.
  • Page 25: Output Impedance Check

    A DC Voltmeter (-hp- Model 3440A/3444A) 0.003 V. will be required for this check. Set Model 467A to SUPPLY ± 20; VOLTS ADJ b. Connect DC Voltmeter between point desig­ fully CW(+20. 00 V). Short Model 467A INPUT. nated in Table 5-5 and circuit ground. Volt­...
  • Page 26: Adjustment And Calibration

    DC Voltmeter should read -20.00 V. viously been established by Performance Checks, e. Short Model 467A output. Connect dc milli­ Paragraph 5-5, that the Model 467A is out of adjust­ ment. Indiscriminate adjustment of the instrument ammeter as shown in Figure 5-5.
  • Page 27: High Frequency Compensation Adjustment(C301, C303, C305)

    Model 467 A. meter (-hp- Model 331A) will be required. 5-33. Conduct a visual check of the Model 467A for b. Connect Model 467A as shown in Figure 5-7. possible burned or loose components, loose connec­...
  • Page 28 Refer to Section VI for parts replacement and -hp- part number information. c. Compone' n t lead hole should be cleaned before inserting new lead.
  • Page 29: Power Supply Checks

    Section V Model 46 TRUE 467A-B-0209 5-8. Figure Troubleshooting Tree 5- 7. Power Supply Checks Table ± ; VOLTS ADJ fully SUPPLY Conditions: Q 1, Q2, Q3 Check (remove instru­ Measure dc output voltage. Should be +20.00 ment bottom cover).
  • Page 30: Top View

    467A Section V Model AI MODULE BOARD POWER TRANSFORMER 461A-A-0097A 5- 9. Figure Top View Q5, 7: 60V, 7A, PNP, Germanium 2N5143 is an acceptable sub: 60V, 5A, PNP germanium POWER TRANSFORMER 5-10. Figure Side View 5- 11. Rear Panel...
  • Page 31: Printed Circuit Board (Ai), Parts Location

    ;t!; OI - O CS O CI28 CI26 CI25 CI27 -CRI47- -CRI16- -R ' 35- -CRI46- -CRI15- -RI46- -CRII8- - RI3 4 - -RI45- LlOI- - RI40- -RI49- -RI39 - LI02- RI51- � .-s- RI 44 - CI24 - -CI23- -CRI23- �...
  • Page 34: Schematic, Power Supply

    467A SCHEMATIC NOTES Model Section V PARTIAL REFERENCE DESIGNATIONS ARE SHOWN. PREFIX WITH ASSEMBLY OR SUBASSEMBLY DESIGNATION(S) OR BOTH FOR COMPLETE DESIGNATION. CRI26 2. COMPONENT VALUES.ARE SHOWN AS FOLLOWS UNLESS OTHER­ +50V WISE NOTED. CIII RESISTANCE IN OHMS CAPACITANCE MICROFARADS...
  • Page 35: Replaceable Parts

    6-5. To obtain replacement parts, address order or cates the description, -hp- part number of each part, inquiry to your local Hewlett-Packard Field Office. together with any applicable notes, and provides the (See Appendix for list of office locations.) Identify...
  • Page 36: Replaceable Parts

    Model 467A Section VI Table 6 - 1. Replaceable Parts REFERENCE -hp­ DESCRIPTION MFR. MFR. PART NO. DESIGNATOR PART NO. 00467 -66501 Assembly: board, amp and power supply, -hp- 00467 -66501 includes: C101 thru C129 Q101 thru Q112 CR101 thru CR147...
  • Page 37 Section Model 467A Table Replaceable Parts 6-1. Con t REFERENCE -h p- DESCRIPTION MFR. MFR. PART NO. DESIGNATOR PART NO. A1CR120, 1901-0025 Diode: Si, 50 mA at +1 V, 100 piv, 12 pF -h p- 1901-0025 A1CR121 A1CR122, 1902-0048 Diode: breakdown, 6.81 V ±5%, 400 m W...
  • Page 38 467A Section VI Model Table 6-1. Replaceable Parts (Cont'd) -hp- REFERENCE MFR. PART NO. DESCRIPTION MFR. PART NO. DESIGNATOR 3900 ±5%. 07115 A1Rl15 0758-0045 fxd. metal-oxide flm. ohms 1/2 W 0758-0005 4700 ±5%. 07115 A1R116 ohms fxd. metal-oxide flm. 1/2W...
  • Page 40 �ss'y po>r /51o-oca7 -AJe� (SIO-OO Section VI qr� -8'»:1 467A Model 034-0-0,32 posr Table 6-1. Replaceable Parts (Cont'd) -hp­ REFERENCE MFR. DESCRIPTION MFR. PART DESIGNA TOR PART NO. A3C306 0140-0202 15 pF ±5% 00853 RDM15C150J5C fxd. dipped mica, A3C307 0170-0019 0.1 fJ.F ±5%...
  • Page 41 Sectiull VI Model 467A Table 6-1. Replaceable Parts (Cont'd) REFERENCE -hp­ M F R MFH. P,\HT NO DESCRIPTION DESIGNATOR PART NO. Cont'd -hp- 0340-0099 03 40-0099 Insulator: anti-rotation boss outer 0340-0100 Insulator: binding post. grey plastic inner 0340-0100 Connector: pwr. receptacle, 3 pin male...
  • Page 42 Section Model 467A 6-1. Replaceable Parts (Cont'd) Table -h p- REFERENCE DESCRIPTION MFR. MFR. PART NO. PART NO. DESIGNATOR MISCELLANEOUS Cont'd black, 5 / 8" diam, for 1 / 4" 0370-0084 Knob: round, -hp- 0370-0084 - ID99 diam shaft 5040-0234...
  • Page 43: Code List Of Manufacturers

    CODE LIST OF MANUFACTURERS following code numbers are from the Federal Supply Code for Manufacturers Cataloging Handbooks H4-1 Code to Name Name to Code and H4-2 and their latest supplements. The date of revision and the date of the supplements used appear at the bottom each...
  • Page 45 CODE LIST OF MANUFACTURERS (Co n t i n u e d ) Code Code Code Monufacturer Manufacturer Address Monufacturer Address 80486 A l l S t a r P r o d u c t s I n c . D e f i a n c e , O h i o R a d i o C o r p .
  • Page 46 Scans by ArtekMedia © 2008...
  • Page 47 Manual Changes MODE L 467A Page 2 CHANGE #2 Page 6 - 2 : Change AICR114 Part No. and description to 1901-0050 Diode: Si 200 ma. � CHANGE #3 On the follow ing pages and figure s the ground symbo ls will be change d as shown unless otherw ise noted .
  • Page 48 Scans by ArtekMedia © 2008 � MANUAL CHANGES 467A MODEL POWER AMPL I F I ER/SUPPLY Manual Part 00467·90003 • New or Revised I,em ERRATA ing as 3·3, FlilUre 3-2. Revise reil' ralo'l P'!! t panel follow$' P1Ig8 1-0, r.ble '·1. Under AccurlCY, change "do;...
  • Page 49 Page 2 MANUAL CHANGES Model 467A CHANGE NO. 5 Applies to Serial Numbers 0994A03171 CHANGE NO. 7 Applies to All Serial Numbers. and Above. Page '·0, Table 1·1. change 50 to Under Power Required Pall8 5·11/5·12, Pa{IG 6·2, Table 6·1. Delete A1CR108 10 66 190, ·0025.
  • Page 50 "Set tion to 1901-0050 Diode: Si 200 mA. the 467A to VAR. ; rotate the VAR from fully CCW to fully CW. The 467 A output should vary from 0 V to CHANGE NO. 3 Appliel to Sarill Numbers 994·02388 Ind AbovI.
  • Page 51 Page 2 of MANUAL CHANGES Model 467A CHANGE ID. 5 Appliel to Seriel IUlll ll en 0994A0317 1 end Allon. CHAIGE ID. 7 Appliel to .11 Seriel I.",ben. Pe .. 5· 1 1 15· 1 2. Pe .. 1-2. 1.bll 8·1. Delete A1CR108 P .
  • Page 52 Teble 8·1. Change A1 CA1 25 1 28 and A 1 CA 1 36 - 1 39 from -hp- Part Number 1 901 -01 58 to 1 901 -0026, Oty 8, Mfr. 0271 3, Mfr. Part Number MP492. p ... 8·&. Change A 1 R 1 58 to 0757-071 5, Aesistor-Fxd 150 ohm 1 %.
  • Page 53 Verso Filler Page ♦ ♦...
  • Page 54 PACKARD HEWLETT Printed in U.S.A. 00467·90003...

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