Stromberg-Carlson-Co-EP-2 电路原理图.pdf

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1、MANUAL OF I9SS MOST-OFTEN-NEEDED RADIO DIAGRAMS Stromberg-Carlson AC (DC Battery Operated Portable Radio ReceiverModel EP-2 VOLTAGE CHART Voltage measurements made at 117 volt 60 cycle lino using vacuum lube voltmeter. Except where otherwise noted, all voltages are positive with respect to B. TUBE F

2、UNCTION p IN NUMBER 1 BS 3 4 5 on warn V-T 1R5 Converter 1.37 BS 42 5.0 1.37 .1 mUm V-2 IU4 I.F. Amp. 2.75 2B 72 NC 2.75 1.5 WBM V-3 1U5 Del. 1st audio 0 18 .2 NC .05 1.37 V-4 3V5 Audio output 4.3 mm 72 NC 5.8 0 7.2 ALIGNMENT PROCEDURE I.F. Alignment Receiver operation at 117 volt 60 cycle AC with v

3、olume control set at maximum. Output meter across speaker voice coil. Use modulated signal with output level from generator no higher than necessary lo obtain indication on output meter. Return tow side of signal generator to B. Use non-metallic alignment tool with light pressure on all slug adjustm

4、ents. SIGNAL INPUT FREQUENCY DUMMY ANTENNA TUNING CAPACITOR ADJUSTMENTS NOTES Converter grid (pin $6 al 1R5) or slalor of C-1A 455 KC (400 cycles modulation) 0.1 mfd Point of non-inter ference al mid frequency Bottom and lop slugs of T-3 and T-2 Adjust for maximum output R.F. Alignment Rotate tuning

5、 condenser until fully unmeshed (min. capacity). SIGNAL INPUT FREQUENCY DUMMY ANTENNA TUNING CAPACITOR ADJUSTMENTS NOTES Converter grid $6 al 1R5) or of C-1A Radiating loop (pin slalor 1625 KC 1400 KC 0.1 mfd Fully unmeshed (min. capacity) Oscillator trimmer C-1D R.F. Trimmer C-1B Adjust for output Adjust for output maximum maximum 收音机爱 好者资料库 RadioFans.CN