Detrola-Radio-and-Telev-Corp-274 电路原理图.pdf

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1、A7 INS IHJ ICS INSTRUCTIONS FOR BATTERY INSTALLATION Remove the batteries from the shipping carton, save the small piece of cardboard packing. Place the *B” pack in the cabinet as shown in the illustration. Then put in the “A” pack, Take the small piece of cardboard packing and fold to a size that w

2、ill wedge the “A pack between the shelf and bottom of case. (See illustration,) The packing is used to prevent the “A” pack from being loose in the case. Connect the “A and “B” plugs as shown in ine illustration. It makes no difference which socket on the “B” pack, the three prong “B” plugs are inse

3、rted. Models 282 - 288 WARNING Be sure the switch is turned off when connect ing batteries. The semaphore shows gold when set is off. ALIGNMENT PROCEDURE I.F. Frequency 455 KC. Set Range 540-1580 KC. Connect the test oscillator, or signal generator, to the set os follows: Connect the hot1 side of th

4、e signal generator to the grid of the 1A7 tube, and the ground side to the terminal on the back cf the chassis. An output meter should be con nected across the voice coil leads of the speaker In indicate resonance. Align the I F. trimmers at 455 KC for maximum meter reading. Adiust tire trimmer on t

5、he back of the variable condenser at or near 1400 KC at full volume on a weak broadcast signal. When aligning the set do not set tlm receiver on or near n metal work bench or other large metal object, as it will affect the tracking of the receiver. COMPILED BY M. N. BEITMAN, SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN