Sentinel-Radio-Corp-1U-347P 电路原理图.pdf

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1、MANUAL OF 1953 MOST-OFTEN-NEEDED RADIO DIAGRAMS . /- MODELS hentmel K (1) make loop of five turns of No. 20 to 30 size wire, wound on a 2 or 3 form; (2) connect this loop across output of oscillator; (3) place test loop near radio antenna. BE SURE THAT NEITHER LOOP OR RADIO MOVES WHILE ALIGNING. “ T

2、EST OSCILLATOR Set receiver Adjust test Use dummy antenna in dial to: oscillator series with output of test frequency to: oscillator consisting of: Attach output of test oscillator to Refer to parts layout diagram for location of trimmers mentioned below: Any point where no inter fering signal is re

3、ceived Exactly 455 K. C. 0.2 Mfd. Condenser High side to pin 6 grid of 1R5 tube. Low side to common negative through a .02 MFD blocking condenser. Adjust each of the 2nd I.F. transformer slugs for maximum output, then adjust each of the 1st I.F. transformer slugs for maximum output. Rotate gang condenser to minimum capacity Exactly 1050 K. C. See Alignment Procedure above See Alignment Procedure above Adjust 1650 K. C. oscillator trimmer for maximum output. Approximately 1400 K. C. Adjust 1400 K. C. antenna trimmer for maximum output. 收音机爱 好者资料库 RadioFans.CN