HP-200D-Manual-sn-70000 电路图.pdf

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1、HP Archive This vintage Hewlett Packard document was preserved and distributed by wwvv. h Please visit us on the web ! On-line curator: Joe Geller RadioFans.CN 收音机爱 好者资料库 I N S T R U C T I O N AND O P E R A T I N G M A N U A L F O R MODEL 200D AUDIO OSCILLATOR Serial 70, 000 and Above HEWLETT-PACKAR

2、D COMPANY 395 PAGE MILL ROAD, PAL0 ALTO, CALIFORNIA, U,S.A. RadioFans.CN 收音机爱 好者资料库 I N S T R U C T I O N S M O D E L 2 0 0 D A U D I O OS CHLL A 2 OR Frequency Rating F r eque ncy Frequency Range - xl x10 XlOO X l O O O S p e c i f i c a t i o n s _F_ - _ - - Range - 7 to 7,000 cycIes/ses. Dial Cal

3、ibration - 7 to 70 7 to 70 eycles/see, 70 - 700 cycles/sec, 700 = 7,000 cycEes/see. 7,000 - 70, 000 cyeles/see. Calibration Accuracy - 52% Frequency Response - k1 db-7 to 70,000 cycbes/aec. Frequency Stability - 5270 under the normal tern perature conditions Reference: 10 volts at 1000 cyeles/sec, i

4、nto 1000 ohms load. including initial warm-up drift. change the frequency less than k -270 at 1000 cyckes/sec. 51070 line voltage variations will Power Output Rating- Power Output-100 milliwatts anto rated load. (10 volts into a 1000 ohms Distortion-Less than Mum voltage -Less than a 1 7 0 of rated

5、output. Load Impedance- 1000 ohms, resistive Internal Impedance -Approximately 25 ohms, 50 to 70,000 cyc$es/sec. One side of output grounded. load) 170 of rated output, 10 to 70, 000 cycles/sec. Power Supp1y Rating-,- Voltage-105 to 125 volts F requency - 50 /60 6: y ele s Wattage-80 watts Overall D

6、imensions- - Rack Model-19 wide x 8-3/4I1high x 12-1/4 deep Panel-19 x 8-3/4, depth behind panel- lOLl/2Il Gabinet Model-18-3/4 wide x 8-3/4 high x 12 deep -1- RadioFans.CN 收音机爱 好者资料库 Weight - Cabinet Model - 2 5 pounds Rack Modek - 27 poumds O p e 2 7 a t i n g I n s t r u c t i o n s - .- Inspecti

7、on - = This instrument has been thoroughly tested and inspected before being shipped and is ready for use when received After the instrument is unpacked, the instrumerzf, shoud be capefully in- spected for damage received in transit, the p-ocedure ontlined in the Claim for Damage in Shipment,? page

8、at the back of this instruction bock, If any shipping damage is found, follow Controls and Terminals - = AC Power - This toggle switch, which is Bocated in the ,owex left coiner of the c G = e i , controls the power supplied to the instrument from the power line. When the switch is in the ON positio

9、n. the red indicator will glow. FUSh = The fusehoider, located on the back of the clzasiis-. ccntains a one ampere cartridge fuse, holder cap and inserting a new fuse The fuse may be replaced by unsar-ewing the fuse- RANGE This rotary switch inseits va:-ious range -.e.jisbors in the fie- _.- quency

10、determining circuit of the oscillator, the multipLyirrg facto? for the fyequency dial calibration and which frequency dial scale should be Lsed. The posiiorn of +his switch indicates Frequency D e frequency dial is calibrated directly in cycles per _E_-_- second Tor the jowest frequency range, AMPL

11、- This variable resistor cont9ol.s the amplitude of the oscillator voltage admitted : : the amplifier and therefore the o t p u t voltage of the znstrument Power Cay?, - The power cable consists of thyee conductors. Two of these :nc-*ckors c a r q power to the instrument whj?e the third conductor (g

12、reen wire) is connected to the instrument chassis. cable ?.ear the plug end of the cabfe and may be connected to a ground when it is desirable to have a grounded instrument chassis, The thiad wire pFojects fiom the Output Terminals - The two binding posts, In the lower right corner of - the car,t-ol

13、 par-el, are tre output terminals, The lower binding port is cDnnected R B b . N a 0 3 3 3 0 t- cd k Q) c n U + .A Operation - Plug the power cable of the Model 200D into a 115 volts, 50/60 cycles power source and turn on the AC power switch. operate as soon as the tubes have heated, but for maximum

14、 accuracy a warm- up period of about 30 minutes is necessary. The instrument will begin to Set the frequency dial and RANGE switch so that their indications, when multiplied together, equals the desired frequency. F o r examplep if it is de- sired to select an output frequency of 1000 cycles per sec

15、ond, set the frequency dial to 10 and the RANGE switch to x10. Connect the output of the oscillator to the equipment being driven and adjust the AMPL. control for the desired output voltage. Although the rated load for the Model 200D is 1000 ohms, higher or lower impedance loads may be used without

16、damage to the instrument. A higher impedance load will result in less power output and a lower impedance load will increase the percentage of distortion in the output voltage. As the output voltage of the audio oscillator is reduced the percentage of hum voltage will increase. large, relative to the

17、 sine wave output voltage. be remedied by operating the audio oscillator at or slightly below rated output and inserting a suitable attenuator between the oscillator and the equipment being driven by the oscillator. for most applications. At the lower levels this hum voltage becomes quite This undes

18、irable condition can The voltage divider circuit shown next is satisfactory MODEL 200D OS GILL ATOR 900 ohms g-r- 100 ohms EQUIPMENT BEING SUPPLIED Other values af resistance may be used to obtain different voltage divisions. In all cases, the sum of the divider resistors should match the rated load

19、 of 1000 ohms. -3- C i r c u i t D e s c r i D t i o n The Model 200D Audio Oscillator consists of an oscillator sectionp an amplifier section, and a conventional power supply, I The oscillator section (tubes V1 and V2) is a resistanee-tqned tyRei cir- cuit. Basically, this oscillator is a two-stage

20、 resistance-coupled amplifieF which is caused to oscillate by the use of a positive feedback network. This network is a frequency-selective resistance-capacity combination which controls the fre- quency of oscillation. By using a variable tuning dondenser for the capacity of the network, it is possi

21、ble to tune the oscillator 0ver a wide lO:k.r,ange; and by using a switching arrangement to select different values of resistance for the net- work, several ranges are given to the oscillator, Negative feedback is used in the: oscillator section in order to minimize distortion and to obtain a very h

22、igh order of stability. feedback is determined by a resistance network, one element of which is non- linear (the 6-watt lamp in the cathode of VI). of feedback in accordance with the amplitude of oscillation and konsequsntly maintains the amplitude of oscillation substantially constant over a wide f

23、re- quency range. the linea* portion of the tube characteristics. It is notable that the lamp has sufficient thermal inertia so that it operates well even at low frequencies. The amount of negative This element controlie the arnnunt The negative feedback also keeps the operation of the system on Fol

24、lowing the oscillator is the output amplifier section which incl tubes V3 and V4. distortion and to provide a good frequency response Negative feedback is used in the amplifier in order te minimize i M a i n t e n a n c e .”- Cover and Bottom Plate Removal - lhe cover is removed by unscrewing the ei

25、ght screws which fasten the cover to the back and top of the instrument. The bottom plate is removed by unscrewing the four screwsg one in each corner of the bottom plate, which fasten the plate to the chassis. Tube Replacement - When replacing any of the tubes except the power rectifier, . . it is

26、desirable to measure the distortion in the output if maximum performance from the instru- ment is desired, because a poor tube can cause excessive distortion without seemingly affecting the operation. rated output with rated load from 10 to 70, 000 cycles. caused b.1- leaking coupling capacitors and

27、 open by -pass capacitors. The distortion should be less than 1% of the Distortion may also be N 0 6 -4- Repiacement of Lamp R9 - - The 6-watt lamp R9 is operated at a very Bow level and should have an almost infinite life. However, should the lamp require changing, it is necessasy to check the ac v

28、oltage from the junction of R21 and C9 to ground with the xLew lamp in the circuit. As measured with a high-impedance ac vacuum tube voltmeter, this voltage should be within the range of approximately 18 - 22 volts when the Model 200D is tuned to 1000 cps. If the voltage is not within this range, it

29、 may he corrected by adjusting R13. Therefore, the lamp should not be changed indiscriminately. If the voltage cannot be brought within the range from 18 to 22 volts by means of R13, the new lamp should be rejected in favor of another, C 0 4 0 0 0 0 u7 rc, 4 0 4 Intermittent Output- - Jumpy or inter

30、mittent output accompanied by flashing of the 6 watt oscillator lamp (R9) is a reliable indication of a short in trimmer capacitor C2 (mounted on gear drive) or in the four front (nearest the panel) sections of the main tuning capacitor. with a weak air jet or other means. Do not bend the capacitor

31、plates because bending capacitor plates will des troy the frequency ca?ibsatisn. If these symptoms occur, search out and clear the short A short in the four rear sections of the main tuning capacitor 01 in trimmer C4 (mounted on chassis at rear end of tuning capacitor) will prevent the circuit Torn

32、oscillating. above Distortion- - Any such short should be cleared as explained Distortion may be caused by defective tubess electrica; leakage in the coupling capacitors, defective electrolytic capacitox-s, low DC supply voltage, O F excessive output voltage from the oscillator section, Frequency Ca

33、libyation- - If a change occurs in the frequency calibration, the instrument should be returned to the Hewlett-Packard Co. for re-calibration, n 0 0 N Trouble Shooting- - The following is a listing of possible symptoms, causes and remedies. Symptoms Causes Reme dies Ins t rume n t inoperative (Indic

34、ator light wont repaace fuse light, no audio output) Blown fuse Clear short circuit and Instrument inoperative Defective tube (Indicator lamp lights, no audio output) Check 5Y3GT tube In te rm i t te n t Output Excessive Distortion Short circuit in DC power circuit capacitor Short circuit in C3 (fou

35、r rear sections) or C4 Short circuit in C3 (four fr-ont sections) or c 2 Capacitor C6, C9, C10, or C 1 1 intermittently open .Defective tube Open capacitor ell, C14abcd or C15 Replace tube (see Tube Replacement in Main- tenance section) e Replace capacitor Clear the short ciruit as outlined in the I

36、ntermit- tent Output paragraph in the Maintenance section. Clear the short circuit as outlined in the Intermit - tent Output paragraph in the Maintenance section. Replace capacitor Replace tube (see Tube Replacement in Main- tenance section) e Replace capacitor Leaking capacitor Replace capacitor c6

37、, c9, c i o , cii, or c12 N 0 G 4 0 P 0 0 0 0 * -6- I N S T R U C T I O N S F O R R E C T I F I E R T U B E R E P L A C E M E N T These instructions apply to any Hewlett-Packard instrument in which a 5V4 tube is mounted in the power rectifier tube socket, replace the rectifier tube, a 5Y3GT tube may

38、 be used as a replacement if the following instructions are followed. When it is necessary to INSTRUMENTS WITH DC VOLTAGE REGULATOR CIRCUIT - The 5V4 tube may be replaced by a 5Y3GT tube without any circuit changes. After the 5Y3GT tube has been installed, the regulated voltage should be meas- ured

39、to see if it agrees with the voltage shown on the schematic wiring diagram in the instruction book. by following the instructions in the instruction book. If the regulated voltage is incorrect it. may be corrected INSTRUMENTS WITHOUT DC VOLTAGE REGULATOR CIRCUIT- The 5V4 tube may be replaced by a 5Y

40、3GT tube providing the resistor, in series with the DC output of the rectifier, is removed, This resistor does not appear in the schematic wiring diagram in the instruction book, The following instruments use a 500 ohms series resistor: Models 200C, 200D, 202D, 210A, 300BCD, and the 400A. 3 t a r a

41、a r o I *I I N N ND $ i z -2 +I1 0 6 I * + + + + + + + a P S h YB .U u I- 1 : I - h TABLE QF REPLACEABLE PARTS C i r cui t Ref D c 1 * c 4 * c 5 C6 c 7 C8 C9 c 10 c11 c1z C13 C14 abcd C15 B e s cripticm Capacitor: fixed, mica, 8% !luf, +570 Capacitor: va-iable, air, lOOuuf Capacitor: variable air, 4

42、 sect, 525 uuf/sectican, 3 is composed of +WQ 4 section capacita: Capacitor: waziable, air, 100 uuf Capacitor: fixed, mica, 100 uyf Electrical value adjusted at facrkoz-y Capacitor: fixed, paper, 5 uf, 600 vdcw Capacitor: fixed, mica, 2000 Iguf Capacitor: fixed, mica, 500 iuuf C7 = 2000 ILigf and 50

43、0 iLigf in parallel This circuit reference not assigned Capacitor: fixedi electroiyti c , 401f 450 vdcw Capacitor. fixed, paper. l ilf9 600 vdcw Capacitor: fixed, ePe cbr olytie 10 %fa 450 vdcw Capacitor fixed, e le c trolytic 40 lAfs 450 vdcw This circuit reference not assigned C ap a c i to r : f

44、i xe d e I. e c t r oh y t i c 20, 20, 20, 20 uf, 450 vdcw Capacitor: fixed, paper, 4 i J f 2 600 vdcw _._D -hp - - Stock No. 15-7 12 -11 12-6 s 12-11 14 100 16 5 14-13 14-500 18 -40 16- k 18 10 18-40 18 4 2 1 1 - 3 _1 Mfr.s resistances I .3 ppfd shunt 524500 -hp 4106 measurements, dc 20 cps to 700

45、mc ) t : a : , : : -hp- Voltmeter Accessories (not listed) include voltage dividers, connectors, shunts and multipliers to extend useful range of your equipment. Data Subject to Change Without Notice. Prices f: 0. b. Factoiy. HEWLETT- Signal Generators- 10 to 7,600 mc -hp- 618A SHF SIGNAL GENERATOR

46、$85000 1 i -hp- 608A i ,o to 5oo mc Output 1 v to 1 pv Amplitude modulated, I pulsed and CW output Direct reading Calibrated output, 1 v to 1 pv Internal 1 I 1 _-_ +- _ _ _ - _, - ._ _ _. A? , $925 00 450 to 1,200 mC 3,800 to 7,600mc.Pro- vides a 1 mw signal 1 .hp6108 pulse modulation Direct calibra

47、tion load (zero dbm). Out- 1 8oo to 2,100 mc Direct reading Pulse modulation, CW 8 1 put attenuator directly -hP 61 4A , FM Output 1 mwor 223vto 1 pv -I into a 50-ohm coaxial 4 - - - 1 . - - . - _ _ $1,950 00 calibrated in dbm and volts, reduces output level i- - - - - - - - _ - , _i_ _ _ _ . _ - -

48、* - _. . $1,950 00 to less than -100 dbm. Frequency dial directly 1 Direct reading Pulse modulation, CW 8 -hp 61 6A tion. CW, pulsed and FM output. $2,250.00 -hp. 618A 1.800 to 4,000 mc FM Output 1 mw or 223 v to 1 pv _ . calibrated, accuracy % of 1 %. Repellor voltage automatically tracked. No adjustment during opera- r i ._ - * - I - $2,250 00 1 3,800 lo 7,600 mc Direct reading. External pulse modulation, C W 8 FM Output 223 Y to 2 23 pv Distortion, Wave Form Analyzers-20 cps to 20 kc -hp- 330B DISTORTION ANALYZER Measures dist