RCA-Victor-Co-Inc-94BT61 电路原理图.pdf

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1、rA(E 589-C MODEL 94BT61 Chassis No. RC -333-C Four -Tube, Single -Band, Battery -Operated, Superheterodyne Receiver Dr.D Sec 455 cc. - a53 rD., c bo A-s=Z D 4 Tube and Trimmer Locations Electrical and Mechanical Specifications Frequency Range 540 to 1,720 kc LOUDSPEAKER R -F Alignment Frequencies. 6

2、00 kc (osc.), 1,500 kc (osc., ant.) Type 5 -inch Permanent Magnet Dynamic intermediate Frequency 455 kc Voice -coil Impedance 3 ohms at 400 cycles RCA TUBE COMPLEMENT (1) RCA -6D8 -G First Detector-Oscillator Height Width Depth (2) RCA -6S7 -G (3) RCA -6T7 -G (4) RCA -6G6 -G I -F Amplifier 2nd Det.,

3、 A -F., A.V.C. Power Output Cabinet Dimensions - Chassis Base 121 in. 101 in. 61 in. 2 in. 91 in. 51 in. BATTERY REQUIRED CURRENT CONSUMPTION 6 -volt Storage A Battery. POWER OUTPUT (6 volts A) Undistorted Maximum At 6 volts, 1.6 amperes. U.45 watt 0.8 watt Over-all Chassis Height Weight Operating C

4、ontrols Tuning Drive Ratio 61 in. 111 lbs. net, 14 lbs. shipping (1) Power Switch-Volume; (2) Tuning 8 to 1 Replacement Parts Insist on genuine Factory -tested parts, which are readily identified and may be purchased from authorized dealers. STOCK No. DESCRIPTION STOCK No. DESCRIPTION RECEIVER ASSEM

5、BLIES 14284 Resistor -22,000 ohms, 1/10 watt (R5) Cable-Battery 12454 Resistor -33,000 ohms, * watt (R2) 30959 14023 Resistor -82,000 ohms, watt (R9) cable complete Cable-Shielded 30967 14560 Resistor -100,000 ohms, watt (Rl) volume control cable Cap-Second I.F. transformer shield cap 12581 12285 Re

6、sistor -470,000 ohms, watt (R7, R8). 12629 Capacitor -56 mmfd. (C6) 12679 Resistor -2.2 meg., watt (R3) 12723 Capacitor -56 mmfd. (C21) 30271 Resistor -4.7 meg., * watt (R4) 14262 Capacitor -110 mmfd. (C5) 13601 Resistor -30 meg., * watt (R13) 12404 Capacitor -120 mmfd. (C7, C8) 14887 Retainer-Retai

7、ner for knob shaft 12725 Capacitor -150 mmfd. (C13) 30952 Shaft-Station selector knob shaft 14712 Capacitor -180 mmfd. (C10) 3682 Shield-Tube shield 13894 Capacitor -390 mmfd. (C4, C27) 31251 Socket-Tube socket 30433 Capacitor -430 mmfd. (C25) 30956 Socket-Speaker socket . 14393 Capacitor-.01 mfd. (

8、C11, C12, C15) 14312 Socket-Vibrator socket 4937 Capacitor-.01 mfd. (C18) 14191 Spring-Drive cord tension spring 30882 Capacitor-.05 mfd. (C9) 14261 Transformer-First I.F. transformer (L5, L8, 30899 Capacitor -0.1 mid. (C1, C14) C5, C6) 30965 Capacitor -0.25 mfd. (C20, C26) 14308 Transformer-Second

9、I.F. transformer (L7, L8, 32152 Capacitor-Comprising 2 sections each 15 mfd. C7, C8, C10, R5) (C16, C17) 32151 Transformer-Vibrator transformer (T1, Lll 30968 Coil-A filter choke coil (L12) C19) 30950 Coil-Antenna coil (L1, L2) 14309 Vibrator-Plug in vibrator (L10) 32148 Coil-Oscillator coil (L3, L4

10、) 30958 Volume control and on -off switch (R6, Si). 32147 Condenser -2 -gang variable tuning condenser (C2, C3, C22, C23, C24) SPEAKER ASSEMBLIES 30877 Cord-Drive cord (Speaker 84226-3) 30905 Core-Adjustable core for I.F. transformers. 32163 Cone-Speaker cone and voice coil (L9) 14289 Clips-Battery

11、clips -1 marked + and 1 32162 Speaker complete unmarked 32164 Transformer-Output transformer (T2) 32186 Dial-Dial scale, plate, and brackets assembled 30701 Drum-Tuning condenser drive cord drum with set screw . MISCELLANEOUS ASSEMBLIES 5140 Fuse-Battery cable fuse (F1) 30975 Crystal-Station selecto

12、r celluloid crystal 14635 Indicator-Station selector indicator pointer. 31355 Knob-Tuning or volume control knob 12848 Resistor -47 ohms, * watt (R14) 30308 Screw-Chassis mounting screw and washer - 8063 Resistor -330 ohms, watt (R11) 4 required 30152 Resistor -1,000 ohms, 1 watt (R10) 14270 Spring-

13、Retaining spring for knob, Stock No. 30734 Resistor -5,600 ohms, watt (R12) 31355 Precautionary Lead Dress 1. Capacitors C20 and C26 must be grounded with as short a lead as possible. C4 and C27 are soldered direct (no leads). 2. The A supply choke (L13) must be dressed clear of chassis. The H.V. se

14、condary leads (brown and green). C18, and R12 must be dressed clear of the chassis and away from other leads. 3. The H.V. secondary mid -tap (brown -black) lead, and the brown lead from L13 to 6G6 -G filament must be dressed close to the chassis and away from other parts. 4. The lead from the antenn

15、a coil (L1 and L2) to the gang must be 9 turns and kept clear of the rotor. 5. The I -F plate lead (blue) must be dressed close along edge of chassis. 6. RIO must be wired with body as close to terminal board as possible. . Battery Charger Connections.- he positive side of the 6 -volt A circuit is c

16、onnected to the receiver chassis, and the chassis is nor- mally grounded. If the charger has a ground on the negative side, the ground should be removed, or changed to the positive, Do not change the length of the leads from the receiver to the battery. RCA VICTOR DIVISION OF RADIO CORPORATION OF AM

17、ERICA, CAMDEN N. J., U. S. A. 收音机爱 好者资料库 RadioFans.CN PAGE 590-C 9146761 Alignment Procedure Cathode-ray Alignment is the preferable method. Connections for the oscillograph are shown in the chassis drawing. Output Meter Alignment.-If this method is used, connect the meter across the voice coil, and

18、 turn the receiver volume control to maximum. Test-oscillator.-For all alignment operations, connect the low side of the test -oscillator to the receiver chassis, and keep the output as low as possible to avoid a -v -c action. For additional details, refer to booklet RCA Victor Receiver Alignment. P

19、re-setting Dial.-With gang condenser in full mesh, the pointer should be horizontal. * NOTE: Values with star (*) are operating voltages in circuits with high series resistance. The actual measured voltages will be lower, depending on the voltmeter loading. Measurements made to chassis unless otherw

20、ise indicated, with the set tuned to a quiet point and the volume control at minimum. Values should hold within approximately 20% with 6 volts A. LI RNT.COIL. 6D8 -G 15T DET fl OSC. 9 TUR L2- C2 10388 MMF. e.2.-nnrcNi C21. S6 MME 3 L3 .2A oec.Col 4 C3 2-10 MMF. Steps Connect the high side of test-os

21、cil- lator to- Tune test-osc. to- Turn radio dial to- Adjust the follow - ing for max. peak output No. 1 6S7 -G I -F grid cap, in series with .01 mfd. 455 kc Quiet point between 550-750 kc L7 and LR (2nd I -F transformer) No. 2 6D8-G.lst-det. grid cap, in series with :01 mfd. 455 kc L5 and LO (1st I

22、 -F transformer) No. 3 Antenna lead. in series with 200 mmfd. 600 kc 600 kc L4 (oscillator) No. 4 Antenna lead, in series with 200 mmfd. 1,500 !cc 1,500 kc C23 (oscillator) C3 (antenna) t Adjust C24 on gang condenser to one complete turn from tight before adjusting C23. TERM. SRO. R11 WL.00NCSSATT.S

23、W. a4-,e.Lew IIIlllllli I L-53(11 TUMB, CATHODE RAY OSCILLOGI.VN CONNECTIONS :- VERTICAL -NI TO THIS TERMINAL AND VERTICAL 0 TO CHASSIS C -a0 RATTERT DRAM 1.5 ARARAT S VOLTS VrRArOR RCA e-S4A1111 18T 1.F. TRAN. o i 100,000 C25 430 MMF. CATHODE CURRENTS NO.1 l.IS MA. NO. a 5.05 MA. NO. a .043 MA. NO.

24、A 14.10 MA. TERM. OHO. 657-G I. F. 2 TO HER L13 FI FU nliLd aroMLK. SE 51 L12 I L11 5AMPS. GANA CANO c -SA NW OONNKTUTURN FROM TIGHT SLIME AL INC SET. C -Is 1ST PET SOSC. -11 6D8 -G ,N coNNECTnN ro FEARER/ CONNECTORS /31V. C-12 -11v 0 113, BOTTOM VIEW -REAR OF CHASSIS Socket Voltages and Location of

25、 Parts Alt. L OUTPUT 666-G 37V. L-! UJ. V A! RC.AO MDT TRANS. o 657-G 6T7-G 2 DET., A. F 8 A.V.C. 3 2ND I.F. TRAN. Ce DP1 PPE 1120 MMF MLL1 470,000 0.1 MFO. LV OSC.qDAC. C12 .0? MFD. 11 1.-2 SMLSNI.C.DAJ USv. aND.DCT. J.uv. 677-G 6G6 -G OUTPUT 4 BOTTOM VIEW OF TUBE SOCKETS L9 VOIT OIL cacEN T2 pen O 0V MATT. c4 C20 C19 390 = 0.25 =I 0.5 MMF. - MFD. MFD. oerrwl C11 .01MFD. R13 10 MEGS. neme -ni R9 82,000 DRDWN C15 .01 FD. C26 (1213. .25 MFD. = R14 4 C17(p) 16 MFD. R11 1 330 C18 T.01MFD R12 5600 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN