DeWald-Radio-Mfg-Corp-A603 电路原理图.pdf

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1、MANUAL OF 1946 MOST POPULAR SERVICE DIAGRAMS r- , DEWALD RADIO MFG. CORP. 72SA7 /2SK7 /2SQ7 301667 S.T 8 i To calibrate rocoivor connect _ fcho output of signal generator to -r-.os the flexible antenna lead attached to the loop antenna. Connect the T lowside of signalgeneratorthrough a 1/10 mfd. con

2、denser to receiver chassis. Adjust signal generator to /? 455 kilocycles and adjust both I. wre* r F. transformers for maximum sign* “i , / al. Open the receiver variable con* I IJ denser for minimum capacity. Set m | signalgeneratorat 1720 kilocycles. A.C-D C. = Peak oscillator section of receiver

3、r.vct condenser for maximum signal. - Next set signal generator at 1500 kilocycles. Tune in this signal. Adjust R. F. section of receiver vari* able condenser for maximum signal strength. Keep the signal genera* tor output as low as possible when making ail of these measurements. 35Z5GT /eS47 12S/C7 5CH6Gr ) P/tor=F-30*ri /300,A50/ 7602 7603 X.F. 4SSKC. = =JOKl =j=. 57 /eSW 37773X667 DbWALD MODEL P602 f/9603 COMPILED BY M. N. BEITMAN, SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN