DeWald-Radio-Mfg-Corp-J-540 电路原理图.pdf

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1、ferwte. looptenna MANUAL OF 19SS MOST-OFTEN-NEEDED RADIO DIAGRAMS CBS-Columbia, MODELS: 5155-Ebony; 5156-Ivory; 5156-Maroon; 5156-Sand Chassis 5T3 vi I2BE6 V3 I2AVB DtT AVC AFAUP I.F. 456 KC. DeWALD Radio-Phonograph Models J-540 and J-541 (The circuit below is exact for J-540. Model J-541 is the sam

2、e except for a jack in the voice coil circuit.) TO PLAY PHONOGRAPH;-Turn volume control-power switch ON. Move Radio-Phonograph switch lever to Phonograph position. Allow approximately one minute for the tubes to heat up. Select desired speed by moving speed lever over number marked on cabinet. Pull

3、needle guard off, but do not discard. Replace needle guard when phonograph is not in use. Set motor lever to proper speed of record. When phonograph or radio is turned off, it is advisable to place this lever in the off position. PEAK AT 455 KC r # % xTal pickup PEAK AT 455 KC * * *1 COUPLATE t.5 MEG VOL. WVA-n CONTROL COUPLATE VALUES R-l- 500K R-2-500K C-l -.005 C-2+C-3- 250 PHONO MOTOR P.M. SPEAKER CHASSIS ON-OFF SW. I2BE6 I2BA6 I2AV6 5 4 3 TO 105-125V 60 A.C. ONLY 23 收音机爱 好者资料库 RadioFans.CN