Philco-Radio-and-Television-Corp-ST997 电路原理图.pdf
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Philco-Radio-and-Television-Corp-ST997 电路原理图.pdf
104 收音机爱 好者资料库 RadioFans.CN FM ALIGNMENT ALIGNMENT PHILCO AM FM RADIO (Continued from preceding page. ) MODELS ST997 AND ST998 Bottom View-Perma-Circuit Panel-Models ST997 and ST998 SIGNAL GENERATOR RADIO STEP CONNECTION TO RADIO DIAL SETTING DIAL SETTING SPECIAL INSTRUCTIONS ADJUST RADIATING LOOP (SEE NOTE 1) 455 KHZ TUNING GANG FULLY OPEN ADJUST FOR MAX. OUTPUT IN ORDER GIVEN T8 T6 6 T10 2 SAME AS STEP 1 1650 KHZ TUNING GANG FULLY OPEN ADJUST FOR MAX. OUTPUT. VC T D AM OSC. 3 SAME AS STEP 1 1400 KHZ 1400 KHZ ADJUST FOR MAX. OUTPUT. VC T C ANT. TRIM. 4 SAME AS STEP 1 600 KHZ 600 KHZ ADJUST FOR MAX. OUTPUT. RDCK TUNING GANG DURING ADJUSTMENT. T 1 1 AM OSC. STEP CONNECTION TO RADIO DIAL SETTING DIAL SETTING SPECIAL INSTRUCTIONS ADJUST 1 COLLECTOR OF Q1 THRU .01 MF CAPACITOR 10 7 MHZ 75 KHZ SWEEP TUNING GANG FULLY OPEN ADJUST FOR MAXIMUM OUTPUT IN ORDER GIVEN REDUCE GENERATOR OUTPUT AS NECESS. T9 A, T7. T5 6 T 4 2 SAME AS STEP 1 10 7 MHZ 30% AM TUNING GANG FULLY OPEN ADJUST FOR MINIMUM OUTPUT (A NULL BETWEEN TWO PEAKS) T9B 3 REPEAT STEPS 1 AND 2 UNTIL NO FURTHER IMPROVEMENT IS OBTAINED 4 CONNECT TO ANTENNA TERMINAL THRU 47 OHM RESISTOR 87.5 MHZ 75 KHZ TUNING GANG FULLY CLOSED ADJUST FOR MAX. OUTPUT. T3 (SEE NOTE A) FM OSC. 5 SAME AS STEP 4 108 5 MHZ 75 KHZ TUNING GANG FULLY OPEN ADJUST FOR MAX. OUTPUT. VC T B FM OSC. 6 REPEAT STEPS 4 AND S UNTIL NO FURTHER IMPROVEMENT IS OBTAINED. 7 SAME AS STEP 4 90 MHZ 75 KHZ 90 MHZ ADJUST FOR MAX OUTPUT. T2 e SAME AS STEP 4 10SMHZ 75 KHZ 105 MHZ ADJUST FOR MAX. OUTPUT. VCTA 105 收音机爱 好者资料库 RadioFans.CN
