Philco-Radio-and-Television-Corp-C-724 电路原理图.pdf

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1、MANUAL OF 19SS MOST-OFTEN-NEEDED RADIO DIAGRAMS PHILCO MODELS C-583, C-721 and C-723 (All Cod. 124) Q-584 (124), C-722 (124), output lead through a .1-mf. condenser to grid (pin 7) of 12BE6. 455 KC Tuning gang fully open Adjust tuning cores, in order given, for maximum output. TCI and TC3 are locate

2、d at top of transformers. TC42nd i-f sec. TC32nd i-f pri. TC21st i-f sc. TCI1st i-f pri. 2 Radiating loop (See note below). 1620 KC 1620 KC * Adjust trimmer for maximum output. Cl-B osc. 3 Same as step 2. 1500 KC 1500 KC Adjust trimmer for maximum output. Cl-A aerial NOTE: Make up a 6-8 turn, 6 inch

3、 diameter loop from insulated wire, connect to signal-generator leads, and place near radio loop. * For proper adjustment of the oscillator trimmer, fully open the tuning gang and insert a .006 inch non-metallic shim between the heel o: the rotor and the top of the stator plates. Close the tuning gang sufficiently to hold the shim in place, and then remove the shim with out disturbing the gang setting. 67 收音机爱 好者资料库 RadioFans.CN