RCA-Victor-Co-Inc-94BK1 电路原理图.pdf

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1、PAGE 576-C MODELS 94BK1 and 94BT1 CURRENT CONSUMPTION A at 1.4 volts, 0.26 amp. B at 90 volts, 9.6 ma. Chassis No. RC -333-B RC -333-B Four -Tube, Single -Band, Battery -Operated Superheterodyne Receivers Model 9411K1 Frequency Range RF Alignment Frequencies. 600 kc (osc., ant.), 1,500 kc (osc., ant

2、.) Intermediate Frequency 455 kc RCA TUBE COMPLEMENT (1) RCA -1A7 -G First Detector-Oscillator (2) RCA -1N5 -G IF Amplifier (3) RCAA-1H5-G 2nd Det., A.F., A.V.C. (4) RCA -105-G Power Output BATTERIES REQUIRED cwnsao Luc Tube and Trimmer Locations Model 94BT-1 Electrical and Mechanical Specifications

3、 540 to 1,720 kc lOwER OUTPUT Undistorted 0.115 watt Maximum 0.280 watt LOU DSPEA 1i ER Type Permanent Magnet Dynamic Diameter 94BK1, 6 inches; 94BT1, 5 inches Voice Coil Impedance 3 ohms at 400 cycles Height Width Depth Cabinet Dimensions (94BT1) 121 in. 101 in. 61 in. Cabinet Dimensions (94BK1) 37

4、1 in. 22 in: 101 in. A, one 1.4 -volt Air Cell or 1.5 -volt Dry Cell. Chassis Base Dimensions 2 in. 91 in. 55 in. B, two 45 -volt heavy duty B batteries. Over-all Chassis Height 6 in Weight (94BT1) 71 lbs. net; 101 lbs. shipping Weight (94BK1) 261 lbs. net; 39/ lbs. shipping Operating Controls (1) P

5、ower Switch-Volume; (2).Tuning Tuning Drive Ratio 8 to 1 Replacement Parts Insist on genuine factory -tested parts, which are readily identified and m STOCK No. DESCRIPTION STOCK No DESCRIPTION RECEIVER ASSEMBLIES 30952 Shaft-Station selector knob shaft 12629 Capacitor -68 mmfd. (Ce) 32149 Shield-Tu

6、be shield 12723 Capacitor -56 mmfd. (C13) 11196 Socket-Tube socket 14262 Capacitor -110 mmfd. (Co) G0956 Socket-Speaker socket 12404 Capacitor -120 mmfd. (C7, CS) 14191 Spring-Drive cord tension spring 12725 Capacitor -150 mmfd. (C11) 14261 Transformer-First IT. (L5, L6, C5, C8). 14712 Capacitor -18

7、0 mmfd. (C9) 14308 Transformer-second I.F. (L7, L8, C7, C8, 30433 Capacitor -430 mmfd. (C17) C9, R3) 5148 Capacitor-.007 mfd. (C12) 30947 Volume control and on -off switch (R5, Si, S2) 14393 4839 32187 Capacitor-.O1 mfd. (C4, C10, C19) Capacitor -0.1 mfd. (Cl) Capacitor -8 mfd. (C18) SPEAKER ASSEMBL

8、IES Model 94BT1 (Speaker 84228-3) 32150 32148 Coil-Antenna coil (L1, L2) Coil-Oscillator coil (L3, L4) 32163 32162 Cone-Speaker cone and voice coil (L9) Speaker-Complete 32147 Condenser -2 -gang variable tuning condenser (C2, C3, C14, C16, C16) 32164 Transformer-Output transformer (T1) 30877 Cord-Dr

9、ive cord SPEAKER ASSEMBLIES 30905 32186 Core-Adjustable core for I.F. transformers. , Dial-Dial Model 94BK1 (Speaker 84146-2) 30701 scale, plate, and brackets assembled Drum-Tuning condenser drive cord drum with screw 30973 30972 Cone-Speaker cone and voice coil (L9) Speaker-Complete 14635 Indicator

10、-Station selector indicator pointer. 30974 Transformer-Output transformer (Ti) 32208 Plug -2 -prong male plug for battery cable 12827 Plug -3 -prong male plug for battery cable MISCELLANEOUS ASSEMBLIES 14076 14284 13715 12264 13730 Resistor -820 ohms, I watt (R9) Resistor -22,000 ohms, 1/10 watt (R3

11、) Resistor -66,000 ohms, watt (Rl) Resistor -220,000 ohms, watt (R10) 30975 31355 30308 Crystal-Station selector celluloid crystal. Knob-Tuning or volume control knob Screw-Chassis mounting screw and washer - (94BT1 only) 4 required 12679 14887 Resistor -1 meg., watt (R4, R6) Resistor -2.2 t.teg., I

12、 watt (R2, R7, R8) 30467 Screw-Chassis mounting screw and washer - (94BK1 only) 4 required Retainer-Retainer for knob shaft 14270 Spring-Retaining spring for knob k_A- VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N. J., U. S. A 收音机爱 好者资料库 RadioFans.CN IA;E 577-C Alignment Procedure Cathod

13、e-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 turn the receiver volume control to maximum. Test-oscillator.-For all alignment operations, connec

14、t 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. Pre-setting Dial.-With gang condenser in full mesh, the pointer should be horizontal. Precautionary

15、Lead Dress 1. Red lead from second i -f transformer to screen terminal.ol 1N5 -G must be dressed close to and along edge of chassis. 2. Twisted green wire from antenna coil to gang must be 9 tunis and kept clear of rotor. 3. Blue and green leads to volume control must be dressed close to chassis and

16、 between Kane and front apron. 7 BLUE ANT. COIL 9 TURN _shy L2 94BKI, 94BTI Steps Connect the high side of test-oscil- lator to- Tune test-osc. to- Turn radio dial to- Adjust the follow - ing for max. peak output No. 1 1N5 -G I -F grid cap, in series with 0.01 mid. 455 kc Quiet point between 550-750

17、 kc L7 and 1,8 (2nd I -F transtornier) No. 2 1A7 -G Ist-det. grid cap, in series with 0.01 mid. 455 kc L5 and 1.11 (1st I -F transformer) No. 3 Antenna lead, in series with 200 mmfd. 600 kc 600 kc L4 (oscillator) L2 (antenna) No. 4 Antenna lead, in series with 200 mmfd. 1,500 kc 1,500 kc C15 (oscill

18、ator) C3 (antenna) t Trmmer C16 on gang condenser should be unscrewed one com- plete turn from tight, before adjusting C15. CATHCC2 RAY : S ,CLOI TO THIS TERMINAL VERTICAL O TO CHASSIS PLATE CURRENTS NO.1 OSC. 0.55 MA. MT. 0.45 MA. N0.2 1.1 II MA. NO3 0.05 MA. NO 4 5.20 MA. 94 BT1-54 SKI RCA MFG. CO

19、., INC. P-6446 in -G 1DET. E OSC. 1 c4 01 MED. irr I.F. TRANS P A L-2 ANTENNA 600 NC GANG COND. SPEAKER SOCKET BATTERY DRAIN 1.4 G 0.26 AMP. -7.4V 1.4 V ( OUTPUT 105-G C -I6 UNSCREW ONE TURN FROM TIGHT BEFORE ALIGNING SET 7.4V. BOTTOM VIEW -REAR OF CHASSIS COIL ose. e00 RC. I.F 1N5 -G Socket Voltage

20、s, and Location of Parts NOTE: Values with star (A) are operating voltages in circuits with high series resistance. The actual measured value will be lower, depending on the voltmeter loading. Measurements made to chassis unless otherwise indicated, with set tuned to a quiet point and the volume con

21、trol at minimum. Values should hold within approximately t 20% with rated battery voltage. C6 56 MMF. 1 NS -G I. F. 2 41 RI 68,000 C7 120 MMF. 1 H5 -G 2NDET. A.F E A.V.C. 3 2.I.F. TRANS. .AI ,l1 7 yrL 8 11 20MMF. R3 C9 22000 6. 1E10 MME BOTTOM VIEW O TUBE SOCKETS 0 DP C 1 10 388 56 MMF MMF. L3 .2R 4 R10 220,000 CI7 30 MMF CI4- S,L 10-388 MMF. OSC. COIL CI5/ 2-10MMF V C16 2-10 MMF. R2 2.2 MEG. WN .I4V Iw.tlrr . CABLE CONNECTIONS TO BATTERY PLUGS 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN