Montgomery-Ward-and-Co-25BR-1542A 电路原理图.pdf

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1、MANUAL OF 1954 MOST-OFTEN-NEEDED RADIO DIAGRAMS TABLE RADIO MODEL NO. 25BR-1542A ci-c Cl-D-O l2AT6 OCjN I2AV6 I m 0 (i (-50L6/GT Alignment must be done in the cabinet. The signal source must be an accurately calibrated signal generator capable of supplying 455 Kc and up to 1620 Kc signals modulated

2、30% with a 400-cycle audio signal. To connect the output meter, disconnect the speaker and substitute a 3.2 ohm, 5 watt resistor across the secondary winding of the output transformer. Connect output meter across 3.2 ohm resistor. SPEAKER LEADS Volume control at maximum for all adjustments. Align fo

3、r maximum output. Reduce input as needed to keep output near 0.4 volts. Loop antenna should be connected to receiver and in its proper position when making adjustments. SIGNAL GENERATOR frequency Coupling Connection to Capacitor_Radio 12BE6, Pin 7 12BE6, Pin 7 12BE6, Pin 7 Lay Generator lead near ba

4、ck of cabinet. Ground Connection TUNER SETTING Capacitor fully open ADJUST FOR MAXIMUM OUTPUT Top and bottom Cores in output (plates out of mesh) and input I.F. cans Capacitor fully open Oscillator trimmer (plates out of mesh) C1-D on gang Capacitor fully closed Set dial pointer at 1400 kc. Check for adequate range Antenna trimmer CI-C on gang 收音机爱 好者资料库 RadioFans.CN