Raytheon-Mfg-Co-8RT1 电路原理图.pdf

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1、VOLUME R-16, MOST-OFTEN-NEEDED 1956 RADIO SERVICING INFORMATION RAYTHEON MANUFACTURING COMPANY 8RT1 CHASSIS MODELS 8TP1, 8TP2, 8TP3 AND 8TP4 CK- 760 CONVERTER RT 4 CK-760 2N0 IF AMP !r* C14 * 1 j*-41,1 m TT 7$: RT CK-722 AUOlO AMP RT7-8 CK -722 AUDIO OUTPUT o?A-7S8, 1.7* T.0O47 .EMITTER BASE COLLECT

2、OR riihhF _inv . Cts T_ *T so*3r ioo v + * DC VOLTAGE READINGS TAKEN UNOER NO SIGNAL CONDITIONS WITH BATTERY VOLTAGE - 6VDC VOLTAGES AT TRANSISTOR SOCKETS WILL VARY SLIGHTLY WITH TRANSISTOR CHANGES- USC ONLr V TV M CIA CIB- C2A_ C2B ALIGNMENT PROCEDURE I Turn Volume Control off. (Full counter-clockw

3、ise)! Use output meter with 15 ohms impedance I Insert four size “D” cells in proper positions. (Positive side towords top of chassis) Turn Volume Control on. (Full clockwise position) Signal generator output ot 100 microvolts, 30% j modulation at 400 cycles. V Both knobs must be in ploce. SIGNAL GE

4、NERATOR COUPLING CONNECTION CAPACITY TO RADIO FREQUENCY 455KC to Base of RT1 GROUND SIDE To Chassis OUTPUT METER Connected in place of speaker GANGED CAPACITY Repeat above step two or three times for best results, keeping generator output in oil cases as low as possible as to prevent overloading of

5、oudio. 1620KC .5MF. To base To Connected Open Gang of RT1 Chassis in place of speaker (Fully clockwise) 1400KC. Caution: Too high on input from signal generator moy couse setting of trimmer on a spurious response. Connect 3 turn loop to generotor and place near loop on receiver. Connected in place of speaker Ganged Condenser should be rocked. ADJUST FOR MAXIMUM OUTPUT IN METER. Top cores of T3, T2 & T1 Adjust C 2B Adjust C 1B Check for alignment ond dial calibration at 1000 KC and 600KC. 134 收音机爱 好者资料库 RadioFans.CN