Crosley-Corp-56PA 电路原理图.pdf

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1、MANUAL OF 1947 MOST-OFTEN-NEEDED RADIO DIAGRAMS MODELS: 56 PA, 56 PB TYPE: Five-tube, combination, battery Portable and AC-DC Superheterodyne. FREQUENCY RANGE: 540 to 1600 kilocycles. INTERMEDIATE FREQUENCY: 455 kc. POWER SUPPLY: AC-DC or BATTERY. VOLTAGE RATING: AC-DC, 110 to 120 volts. Battery “A”

2、 7J4 volts “B” 90 volts. POWER OUTPUT: 180 M.W. maximum. SOCKET VOLTAGE CHART OSCILLATOR GRID VOLTAGE FREQ. I VOLTS 540 KC -12.5 540 KC *-l3.0 DET-AVC 1ST A.F. amp. I.F. AMPLIFIER POWER OUTPUT NOTES: I. these are bottom view of tube sockets. MEASURE VOLTAGES FROM SOCKET LUGS TO B(LUG N0.7 ON 11726 S

3、OCKET.) 3. THESE VOLTAGES WERE MEASURED USING AN ELECTRONIC VOLTMETER. 4. W.d.-WIRING JUNCTION. 5. N.C. - NO CONNECTION. 6. A - VOLTAGES MEASURED WITH RADIO PLUGEO INTO 117 V -60 LINE. 7. *-60 CYCLE A.C. VOLTAGE. 8. ALL OTHER VOLTAGE TAKEN IN BATTERY OPERATION POSITION WITH 7.6 VOLTS. qt 90 VOLTS. B

4、 SOCKET voltage TOLERANCE 10%. 收音机爱 好者资料库 RadioFans.CN MANUAL OF 1947 MOST-OFTEN-NEEDED RADIO DIAGRAMS MODELS 56PA and 56PB I ALIGNMENT PROCEDURE Turn the tuning condenser to the completely closed position against the stop and set the dial pointer to the reference line at the end of the dial scale.

5、Connect the output meter across the speaker voice coil. Connect the high side of the signal generator to the eternal antenna wire of the loop, that connects to the terminal screw on the bottom of the cabinet, as indicated in the alignment chart. Connect signal generatoi ground through a 0. 1 mt. con

6、denser to B. (No. 1 pin on 1R5 tube). Turn the volume control on full and adjust the signal generator output to produce approximate! mid-scale deflection of the output meter, but maintain signal generator output as low as possible to prevent AVC action in the receiver. Alignment Sequence 1 2 Position of Tuning Dial KC 1620 1620 1400 Adjust for Maximum Outout A & B C D Signal Generator Output In Series To with 200 mmf. Ant. Ant. Ant. INTERLOCK SWITCH 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN