Philco-Radio-and-Television-Corp-53-652 电路原理图.pdf

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1、MANUAL OF 19S3 MOST-OFTEN-NEEDED RADIO DIAGRAMS PHILCO PORTABLE RADIO MODEL 53-651 Philco Model 53-652 has almost an identical electrical circuit. 9 1 2 ONUS CUjj/ JCt 40 osu? 5,000 OH-AVC- *51 AUDIO CONVERTER If AMPL OUTPUT IF-455 KC (PART or R1 1LE TRIMMER ElECTROLTTiC COI taoltuc con with i TUNIN

2、G CORE I NOTES AIL R E 5 15 TOR VALUES (N OHMS AND All CONDENSER VALUES IN UUF UNI E 55 OTHERWISE MARKCO S.E 55 THAN I OHM ALL VOIT AGE 5 SHOWN WERE MEASURED W,TM A EO.OQO-Oh U5 - PE R-VOlT METER FROM POINTS INDICATED TO 8- Figure 3. Front View of Pointer Rail, Showing Alignment Marks Showing Alignm

3、ent Maries .wafer SWITCH IRS 1U4 IDS 3V4 /RESISTORS R1S,R1? CONVERTER IF AMPL DET.AVC OUTPUT / *?*!?|*N?. 1 J 4t audio j / CONDENSER C14 TCI TC3 TC2 TC4 T AUDIO | / , a, CONDENSER C14 LOCATED ON WS UNDER SWITCH -1 COVER OOZllr 220UU.T O1II.F 001 lif fU8E SOCKET VOLTAGE5 j U4 I U5 I 3V4 LTUNHIG CIA C

4、tB CONTKOL C2 LOCATED UNDER CIA Figure 2. Top View, Showing Tuning Adjustments SIGNAL GENERATOR 1 CONNECTION TO RADIO DIAL SETTING Output lead through a .1-uf. con denser to antenna section of tun ing condenser or to pin 6 of con verter (1R5). Ground lead to B. 455 kc. Radiating loop. See NOTE below

5、. 1620 kc. Same as step 2. Between 1400 and 1500 kc. Same as step 2. 580 kc. 1 RADIO DIAL SETTING SPECIAL INSTRUCTIONS ADJUST Tuning gang fully open. Adjust, in order given, for maxi mum output. TC42nd i-f sec. TC21st i-f pri. TC31st i-f sec. 1620 kc.t Adjust for maximum output. C1Bosc. trimmer Tune

6、 radio to generator signal. Adjust for maximum output. CIAantenna trimmer 580 kc.t Adjust for maximum output. Rock tuning gang while making this adjustment. TCIosc. core Repeat steps 2, 3, and 4 until no further improvement is obtained. NOTE: Use a 68 turn, 6-inch diameter loop made up of insulated

7、wire. Connect to signal-generator leads, and place about 1 foot from radio loop antenna. t The radio can be set to this frequency by tuning it until the dial pointer coincides with the proper align ment mark on the bottom of the chassis. See figure 3. 81 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN