RCA-Victor-Co-Inc-O-50 电路原理图.pdf

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1、MANUAL OF 1940 MOST POPULAR SERVICE DIAGRAMS MODEL O-50 PORTABLE VICTROLA (phonograph only) The Model O50 Portable Electric Victrola consists of a crystal pickup, a twOStage audio amplifier, and eight inch electrodynamic speaker, and a motor turntable mechanism with automatic mercury switch for star

2、ting and stopping all housed in a portable carrying case of modern design and appearance. The phonograph motor is a selfstarting, constantspeed induction type. It should be lubricated every six months by applying a few drops of light machine oil to the spindle bearing and oil hole The motor spindle

3、is tapered, and a conical rubber piece fits snugly on the spindle. The hole in the turntable bushing C4 20 MFD. R4 . 330O*u is tapered to fit the rubber. This provides an excellent self centering floating mounting. A metal washer is placed on the spindle under the rubber piece. The washer has ears o

4、n the under side which fit over a pin that projects through the spindle. The motor switch is automatic for both starting and stop ping, and when properly adjusted, will turn the motor on as the pickup is moved from the pickup rest toward the turntable The switch should be adjusted so that it will sn

5、ap into the “off” position when the pickup needle is 1% inches from the center line of the spindle. The motor may be shut off at any time by placing the pickup on the pickup rest. 6F6-G OUTPUT C 2 1BOO MMF. Rl a7,ooon. MOTOR Ml V SI (on volume CONTROL) R2- lO,OOOiv U .0025 MFD.V f*. R8 io.ooo HUM NE

6、UT. COIL-LZ GREEN-RFD TR - (flm FIELD L3 1800 R6 220,000 M-ee _-ft- RS-91 brown | Black T Trcii 025MFD Model 0-50 Schematic Circuit Diagram CATHODE CURRENTS (IX5SF5 O 48 MA tn&re-e 43.30 TOTAL RECTIFIED 44.00 - AUXILIARY CAM CAM SET SCREWS ACTUATING LEVER 3? WI467Y* . Black BOTTOM VIEW-REAR OF CHA53

7、1S Parts Layout and Socket Voltages Measurements made to chassis unless otherwise indicated, with set tuned to quiet point, volume control at minimum. Values should hold within approximately 20% with 117 volt a-c supply. MERCURY-TUBE ADJUST MAIN CAM SO THAT SWITCH TRIPS INTO THE OFF POSITION WHEN NE

8、EDLE IS t3/4 INCHES FROM THE CENTER LINE OF MOTOR SPINDLE. Switch Mechanism (Shown with pickup in rest position) * NOTE: Values with star (*) are operating voltages in circuits with high seriesresistance, and when measured will read lower depending on the voltmeter loading. COMPILED BY M. N. BEITMAN

9、, SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN PAGE 509-C Increasing Victrola Gain: The over-all amplification of these models, when used as Victrolas, is limited by the volt- age divider circuit comprised of a resistor in series with, and a capacitor across the pickup circuit. Values of these compo

10、nents are estab- lished on the basis of: (a) Average available voltage output from pickup under average climatic conditions. (b) Degree of rumble likely with given am- plification. (c) Danger of microphonic howl with high amplification. (Il) Possible consumer reaction to overload oc- curring at a lo

11、w volume control setting with heavily cut records. If these points are kept in mind, additional gain may he obtained, wherever desired, by de- creasing the value of the pickup shunt capaci- tor: C-1 in Model 0.50 The substitute capacitor should be ap proximately to I the value of the original. MODEL

12、S 0-50 and R-60 Three -Tube Electric Phonographs Electrical and Mechanical Specifications TUBE COMPLEMENT (1) RCA-6SF5 A -F Amplifier (2) RCA -6F6 -G Output (3) RCA -5Y3 -G Rectifier POWER SUPPLY RATINGS A-6 105.125 volts, 60 cycles, 90 watts A-5 105-125 volts, 50 cycles, 90 watts LOUDSPEAKER O-50 T

13、ype 8 inch electrodynamic V. C. Impedance at 400 cycles 3.2 ohms VOL. GONTR. PICKUP 6F6 -G O TROT BROWN -BLACK GATHODE CURRENTS (1165F5 O.46 MA 216F6n 6d.0 - 5Y3-6 / REGT: e O 370V -C10 SPEAKER GABLE O. ELECT. CAR Ti FLAME 55v3=6 F6 -G - 5:O AG. P-84411 BOTTOM VIEW -REAR OF CHAO3IA Parts,Layout and

14、Socket Voltages 6SF5 A. F. BOTTOM VIEW OF TUBE SOCKETS C2 tjt .005 MF D. vVVv R1 27,000. Cl .025 MFp. rll%-1 MOTOR M1 R2- o 10,o0On o C3 = .025 N1F0, 52 TI 51 (ON VOLUME CONTRO L) RCA Vietrola R -60 - PICKUP e Crystal Impedance 100,000 ohms at 400 cycles Average Output. 11/2 volts at 1,000 cycles wi

15、th 250,000 ohms load LOUDSPEAKER (RL -79-2) R60 Type 6 -inch electrodynamic V. C. Impedance at 400 cycles 3.4 ohms * NOTE: Values with star (*) are operating voltages in circuits with high series -resistance, and when measured will read lower depending on the voltmeter loading. Measurements made to

16、chassis unless otherwise indicated, with set tuned to quiet point, volume control at minimum. Values should hold within approximately 20% with 117 - volt a -c ,supply. c4-_, 6F6 -G MFD. OUTPUT R4 33OOn CG R5 390. C5 20 MFD. CB-.OI MFD, R3 .0035 MFD. VOLUME CT CONTROL .0025MFO: 250, oo0A CONTROL S TO

17、TAL TONE S3 SWITCH ,rA GREEN -RED TR BROWN- L Fl OW EL D A C9 L3-18Bo. T., II=AT=RS IS MFD.JJI 5Y3 -G RECT. ROLLER LEVER SPRING ACTUATING LEVER SHELLAC ASO RS 10,000 C =C n , _C11 R1 .025MFD. 220,002 BROWNS BUCK 11111,111 i 11:1W CAM SPRING 4:t CAM SET SCREW CAM ASSEMBLY SPOOL CLIP MERCURY TUBE MERC

18、URY SWITCH MECHANISM (VIEWED FROM FRONT SHOWN WITH PICKUP IN REST POSITION) 3A - L1 HUM NEUT. COIL - L2 *NOTE: MODEL o-50 c2 IS 1800 MMFD CIO The motor switch is automatic for both starting and stop - I is MFD ping, and when properly adjusted, will turn the motor on as the pickup is moved from the p

19、ickup rest toward the turntable. The switch should be adjusted so that it will snap into the off position when the pickup needle is 13/4 inches from the center line of the spindle. The motor may be shut off at any time by placing the pickup on the pickup rest. RCA VICTOR DIVISION OF RADIO CORPORATIO

20、N OF AMERICA, CAMDEN N. J., U. S. A. 收音机爱 好者资料库 RadioFans.CN PAGE 51.0-C 0-50, The phonograph induction applying bottom motor to the turntable R-60 motor is a self-starting, constant -speed CAUTION: Keep oil away from drive bushing on top of type. It should be lubricated every six months by motor sp

21、indle and from rubber driving tire on turntable a few drops of light machine oil to the top and drive wheel. spindle bearings, to the turntable spindle, and drive wheel bearing. REPLACEMENT PARTS Insist on genuine factory -tested parts, which are readily identified and may be purchased from authoriz

22、ed dealer:. STOCK No. DESCRIPTION STOCK No. DESCRIPTION MODEL 0-50 MODEL R-60 AMPLIFIER ASSEMBLY AMPLIFIER ASSEMBLIES 13580 Capacitor -1800 mmfd. (C2) RS -91B 5107 Capacitor-.0025 mfd. (C7) 5107 Capacitor-.0025 mfd. (C7) 30303 Capacitor-.0035 mfd. (C6) 30303 Capacitor-.0035 mfd. (C6) 4937 Capacitor-

23、.01 mfd. (C8) 33584 Capacitor-.005 mfd. (C2) 4870 Capacitor-.025 mfd. (C1, C3, C11) 4858 Capacitor-.01 mfd. (C8) 33214 Capacitor-Electrolytic, 2 sections 15 mfd. and 4870 Capacitor-.025 mfd. (C1, C3, C11) 2 sections 20 mfd. (C4, C5, C9, C10) 33214 Capacitor-Electrolytic, comprising 2 sections 33212

24、Control-Tone control switch (SS) 15 mfd. and 2 sections 20 mfd. 30868 Plug -2 -contact female motor cable plug 33212 Control-Tone control 12493 Plug -5 -contact female speaker cable plug 33215 Control-Volume control and power switch 31388 Resistor -390 ohms, 1 watt (R6) 30868 Plug -2 contact female

25、plug for motor leads. 12312 Resistor -3300 ohms, watt (R4) 5119 Plug -3 contact female plug for speaker 14559 Resistor -10,000 ohms, watt (R2, R8) 31388 Resistor -390 ohms, 1 watt (R5) 12738 Resistor -27,000 ohms, watf (R1) 12312 Resistor -3,300 ohms, watt (R4) 12284 Resistor -220,000 ohms, watt (R8

26、) 14559 Resistor -10,000 ohms, watt (R2, R8) 12285 Resistor -470,000 ohms, * watt (R7) 12738 Resistor -27,000 ohms, watt (R1) 14278 Socket-Pickup input socket 12264 Resistor -220,000 ohms, watt (R6) 32537 Socket-Tube socket 12285 Resistor -470,000 ohms, watt (R7) 14796 Transformer-Power transformer

27、105-125 volts, 32537 Socket-Tube socket 33215 50-80 cycle (T1) Volume control and power switch (R3, S1) 14796 Transformer-Power transformer, 110 volts, 60 cycles PICKUP AND ARM ASSEMBLIES PICKUP AND ARM ASSEMBLIES 33216 Arm-Pickup arm-less crystal, needle screw, 33591 Arm-Pickup arm shell and cable

28、34299 Arm-Pivot arm and shaft 33218 33217 Base-Pickup arm mounting base and pivot shaft Crystal-Pickup crystal cartridge and needle 34758 Bushing-Rubber and metal bushings for pickup pivot arm screw 33122 Crystal-Pickup unit crystal cartridge 33114 Damper-Viscoloid damper for pickup armature 33123 D

29、amper-Viscoloid damper 31160 Screw-Pickup needle screw 33529 Screw-Needle screw MOTOR ASSEMBLIES MOTOR ASSEMBLIES 32650 Field-Motor field coils and laminations, 110 35248 Arm-Turntable drive wheel arm and stud volts, 50 cycle (84569-8) 34276 Coil-Field coil complete 32338 Field-Motor field coils and

30、 laminations, 110 volts, 60 cycle (84569-7) 34280 Clip-Spring clip for turntable shaft and drive wheel 33220 Motor -105-125 volts, 50 cycles-less mounting 35247 Mounting -1 set of motor plate mountings 33219 plate (M1) Motor -105-125 volts, 80 cycles-leas mounting plate (M1) 35246 34277 34279 Plate-

31、Motor plate with spindle bearing Pulley-Motor pulley and set screw Shaft-Turntable shaft and spring clip 33361 Shaft-Turntable spindle shalt and gear -50 34281 Spring-Drive wheel arm spring cycle 34278 Wheel-Turntable drive wheel and spring clip. 33360 Shaft-Turntable spindle shaft and gear -60 cycl

32、e SPEAKER ASSEMBLIES AUTOMATIC SWITCH ASSEMBLIES (RL -79-2) 33221 Cam-Cam assembly comprising main and 32907 Cap-Speaker cone center dust cap auxiliary cams, hub, and set screws 32903 Coil-Speaker field coil (L3) 32864 Lever-Actuating lever with roller and mercury 32906 Coil-Sneaker hum neutralizing

33、 coil (L2) tube clip 35441 Lone-Sneaker cone and voice coil. 14195 Screw-No. 10-32 x 5/16 cone pointed set screw 5118 Plug -3 -prong male fo speaker for cam hub 32905 Transformer-Output transformer (T2) 32869 Screw-No. 10-32 x 5/18 set screw for cam hub 32868 32867 Spring-Actuating lever tension spr

34、ing AUTOMATIC SWITCH ASSEMBLIES 32885 32866 31608 Spring-Cam tension spring Support-Switch support and terminal board Switch-Mercury tube with leads (S2) Washer-C washer for actuating lever shaft 32863 32864 Cam-Cam assembly comprising main and aux - iliary cam, hub and set screws Lever-Actuating le

35、ver with roller and mercu switch clip ry SPEAKER ASSEMBLIES (84804-1) 31118 Screw-No. 10-32 x 5/16 fillister cone pointed set screw 53408 Cone-Speaker cone and 32868 Spring-Actuating lever tension spring 5118 voice coil (Ll) Plug 32867 Spring-Cam tension spring 33222 33407 -3 -contact male for speak

36、er Speaker complete Transformer-Output transformer (T2) 32865 32866 31608 Support-Switch support and terminal board. Switch-Mercury tube with leads (S2) Washer-C washer for holding actuating lever MISCELLANEOUS ASSEMBLIES 11865 Cup-Needle cup MISCELLANEOUS ASSEMBLIES 31484 Damper-Damper plate and ru

37、bber sleeve for 4288 Cap-Pickup lead cap spindle 4286 Ferrule-Pickup lead ferrule and bushing 11771 32633 Foot-Cabinet foot Handle-Carrying handle 31355 34264 Knob-Tone control or volume control knob. Mounting-Motor mounting hardware 13085 31355 Hinge-Cabinet lid hinge Knob-Volume control or tone co

38、ntrol knob 30870 32610 Plug -2 contact male plug for motor leads Rest-Pickup rest 33223 Mounting-Complete set motor mounting screws, washers, and spacers 14270 Spring-Retaining spring for knob Stock No. 31355 31054 Mounting-Pickup arm mounting cushion, washer, and nut 34265 Turntable-Complete 30870 Plug -2 -contact male for motor leads 31048 Plug -2 -contact male plug for phono, cable 33364 Support-Cabinet lid support (LH) 33873 Support-Pickup arm support 33404 Turntable 收音机爱 好者资料库 RadioFans.CN