RCA-Victor-Co-Inc-OSC-22 电路原理图.pdf

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1、MANUAL OF 1940 MOST POPULAR SERVICE DIAGRAMS Models 40X-30 and 40X-31 (Chassis No. RC405C & D) STDET.&0SC 12SA7 I. F AMPL I2 5K7 DEI. ,A.F S. A V C. I2SQ7 OUTQUl 35L6GT .ozs 35U&T 1ZSQ7 r4 40 Cl 12SK7 3575GT 1/25A7 9I5KCC /C5 st1F Cl CZ 2 2 iuGih 455KC %skc 22 Output Meter Alignment.Connect the mete

2、r across the voice coil, and turn the receiver volume control to maximum. Test-Oscillator.Connect the low side of the test-oscillator to the receiver chassis, through a .01 mfd. capacitor, and keep the output as low as possible. Pre-setting Dial.With gang condenser in full mesh, the pointer should b

3、e horizontal. Antenna.The set is equipped with a built-in loop antenna. If an outdoor antenna is used, it may be connected to the “ANT.” terminal on rear of cabinet. It should not be longer than 100 feet, including lead-in. If it is longer, connect a 100 to 200 mmf. capacitor in series with the lead

4、-in. Power-Supply Polarity.For operation on d-c, the power plug must be inserted in the outlet for correct polarity. If the set does not function, reverse the plug. On a-c, reversal of the plug may reduce hum. Steps Connect the high side of test- oscillator to- Tune test-osc. to Turn radio dial to A

5、djust the fol lowing for max. peak output 1 Tuning condenser stator (osc.) in series with .01 mfd. 455 kc Quiet point at 1,600 kc end of dial Cl, C2, C3, C4 (1st and 2nd I-F transformers) 2 Antenna term, of ant. loop in series with 100 mmfd. 1,680 kc Full clockwise (out of mesh) C5 (oscillator) 3 1,

6、500 kc Resonance on 1,500 kc signal C6 (antenna) Precautionary Lead Dress 1. Dress 2nd I F green lead close to chassis and under other parts. 2. Dress lead from gaig condenser to grid of 12SA7 close to chassis and away from 12SQ7 socket. 3. Dress blue 1st I-F lead under volume control close to chass

7、is. - OSC-22 Wireless Oscillator COMPILED BY M. N. BEITMAN, SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN OUTPUT WIRE (In POWER) CORO r CI -ti lao MMF. 3MA 65A7 MOD. 08C - 127V 26 V. Oqplop IIMMr 13 M60A.V. - 04 MED. I C LI Lt l T N C9 C / 5DE0 TrnMfD. M Cs It T J0.2MfD. 11 Mf 50 6eaKc I I POWER /7 1

8、 8 6-4 SUPPLY R9 VOLTAGES MEASURED TO COMMON 120,000 NEGATIVE LINE. OTHERWISE (CnaY+rROI ytaGIF1ED. 259. H 36324 2546-G REGT. Rs RB 286A 117V. AC. 1ME6. R7 200000 fneno MlVT CI 0.2Mr0. B86A BALLAST RI 47,000 plA b The RCA Victor Wireless Oscillator is an adapter unit used to convert your Victrola At

9、tachment, such -as the RCA Victor Model VA. 22, into a wireless record player. This permits you to play phonograph records through your radio receiver without any connecting wires from the Victrola Attachment to the Radio Receiver. INSTALLATION Certain RCA Victrola Attachments such as the VA -22 are

10、 provided with a side shelf in. side the cabinet for mounting the Wireless Oscillator. Three holes are drilled in the shelf correctly spaced for the oscillator mounting bolts to go through and screw into the holes in the OSC-22 chassis base. To install the OSC-22 first detach the VA -22 power cord f

11、rom the electric outlet, then: 1. Look in the back of the VA -22 or similar Victrola cabinet and locate the connection front the pickup to the volume control on the side of the cabinet. This is a length of wire with a connector plug on one end. Disconnect the plug from the bayonet socket and then lo

12、osest the set screw and remove the knob and the volume control on the other end of the wire, together with the wire, from the VA -22 cabinet. It is attached to the cabinet by a nut and washer. 2. Mount the OSC-22 on the cabinet shelf with the three mounting screws and_ washers provided. 3. Mount tin

13、e OSC-22 Power Switch and Volume Control unit in the location from which the VA -22 volume control was re- moved, using the washer and nut taken from the VA -22 volume control. Be sure that the locating pin on the new control is in the correct position. Attach knob on shaft of Power Switch and Volum

14、e Control unit and tighten up the set screw. 4. Insert the pickup plug into the connector on the cable of the newly installed Volume Control of the OSC-22. 5. Insert the plug on the end of the VA -22 power cord into the power receptacle on the OSC-22 chassis base. 6. Insert the plug on the end of th

15、e OSC-22 power cord into the electric outlet. Circuit Changer The low end of the volume control and re- sistor R5 and capacitor C71 are connected to the common negative line (not to the chassis). C11 is changed from .2 mfd. is .1 mfd. !Stock No. 4839) in some production Replacement Parts OSC-22 Insi

16、st on genuine factory -tested parts, which ere readily identified and may be purchased from authorized dealen. 128000. - Ics 0A MfD SIDE OF CABINET POWER, SWITCH ANO VOLUME CONTROL TO PICKUP LEAD eSEa6 0557 LA V. 6.2 V AC. AC. RECEf. PAGE 395-C OSC-22 Wireless Oscillator FREQUENCY RANGE Approx. 530-

17、625 kc TUBE COMPLEMENT (1) RCA-6SA7 Modulator -Oscillator (2) RCA -25Z6 -G Half -Wave Rectifier (3) Type B -86-A Ballast Resistor POWER SUPPLY RATINGS A -C Rating. 105-125 volts, 25-60 cycles, 35 watts D -C Rating 105-125 volts, 35 watts DIMENSIONS Chassis Base 71 -in. x 41 -in x 21 -in. Precautiona

18、ry Lead Dress. - 1. Keep 110 -volt leads away from oscillator coil. 2. Leads to oscillator coil must he short and direct. RECEPTACLE FOR VICTROLA ATTACHMENT POWER PLUG MOUNTING I THOLES T SHELF / f r osC-z2 CHASSIS 2526 G PLUG -Is RESISTOR, POWER CORO AND PLUG BACK OF CABINET WING TYPE ADJUSTER i of

19、 the wire should he -wound 3 or 4 turns around the outside of the receiver antenna lead. When an RCA Master Antenna is used, the wire should be wound around the counterpoise lead where it is attached to the A-3 terminal of your radio receiver antenna terminal board Radio Receiver Control. -Your radi

20、o re- ceiver picks up the record selection as it does a broadcast program. So after the Victrola Ad- justment is made, you must tune your radio receiver to the signal from the Wireless Victrola Attachment between 530 and about 630 kilo- cycles. Do this according to the instructions for operating you

21、r particular receiver and turn thy. Tuning Control to bring the pointer on the dial scale to the low frequency end of the Standard Broadcast band, about 530 to 630 kilocycles, and tune in accurately with the Wireless Victrola Attachment playing a selec- tion. This point is your Victrola station. If

22、you have a radio with Push Button Tuning you can set a push button and label it Victrola. The push button or switch labeled Victrola, Record Player or Phono on RCA Victor Radio Receivers previous to 1939 is of no use with the Wireless Victrola Attachment. CONTROLS AND MOVING MECHANISM In order to ob

23、tain best reproduction, the newly installed Volume Control shoul1 first be turned on about 2/3 full and the Volume Control on your radio receiver turned to the point that gives the greatest volume you are likely to require. Then all control of volume may be made with the knob on the Wireless Victrol

24、a Attachment. In particularly noisy locations it may be preferable- to set the Vol- ume Control, of the Wireless Victrola Attach- ment at about 2/3 full and regulate with the volume control knob on the receiver. The Victrola Adjustment. -On the back of the OSC22 chassis is a small adjusting rod to g

25、ive reproduction at the most convenient point on your radio receiver dial. With your radio receiver in operation, set the Tuning Control to bring the pointer on the Standard Broadcast Scale to a point at the low frequency end between 530 and about 630 kilocycles, 530 is preferable, at which no stati

26、on can be obtained. Then set your Wireless Victrola Attachment in operation and turn the adjusting rod on the OSC-22 slowly and carefully until the record reproduction is heard at its best. Antenna Modification. -If, due to your par- ticular special conditions, insufficient volume or excessive noise

27、 interference affects record reproduction, a simple remedy is to connect a wire from the Wireless Victrola Attachment to your radio antenna lead. This is easily ac- complished by means of a length of wire to cover the distance between the Victrola Attach- ment and Radio Receiver. One end of this sho

28、uld be wound 3 or 4 turns around the out- side of the short wire projecting from the OSC-22 plug on the power cord. The other end PLAYING Plug the power cord from the OSC-22 into .a convenient house outlet, then to play records proceed as follows: 1. Turn on the power to your radio receiver. 2. Set

29、the tuning knob to your new Victrola station (530 to 630 kilocycles), or if you have specially adjusted a push button, press it. 3. Turn on power to the Wireless Victrola Attachment. 4. Make the set-up for playing records in ac- cordance with the original instructions accompanying the Victrola Attac

30、hment. 5. Turn the Wireless Victrola Attachment Volume Control about 2/3 fully clock- wise. 6. Adjust radio receiver Tuning knob to ac- curately tune in the phonograph selection. 7. Turn Radio Receiver Volume Control to give the loudest reproduction you are likely to require. 8. Adjust the Wireless

31、Victrola Attachment Volume Control to suit 9. Adjust radio receiver Tone Control if de- sirable. Wireless Oscillator STOCK No. DESCRIPTION STOCK No. DESCRIPTION 33793 Ballast -Ballast resistor tube -Type B86A (R8) 33792 Receptacle-A.C. receptacle 12723 Capacitor -56 mmfd. (C2) 33793 Resistor -Ballas

32、t resistor tube -Type B86A (RS) 13003 Capacitor -180 mmfd. (Cl) 14075 Resistor -8,200 ohms, l watt (R3) 12694 Capacitor -220 mmfd. (C3) 12412 Resistor -47,000 ohms, I watt (R1, R2) 4839 Capacitor -0.1 mfd. (C4, C8) 13734 Resistor -120,000 ohms, 1 watt (R5, R9) 33834 Capacitor -0.2 mfd. (C9, C11) 137

33、30 Resistor -1 meg., I watt (R4) 32576 Capacitor -Electrolytic, one section 20 mfd., and 13601 Resistor -10 meg., I watt (R6) one section 12 mfd. (C5, C6) 31251 Socket -Tube socket - 12635 Capacitor -1,000 mfd. (CIO) 33793 Tube -Ballast resistor tube -Type B86A (R8) 32501 Coil -Oscillator coil (L1, L2) 33794 Volume control and switch (R7, Si) RCA VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N J., U. S. A 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN