Farnsworth-Television-and-Radio-Corp-ET-061 电路原理图.pdf

收音机爱 好者资料库 RadioFans.CN MANUAL OF 1947 MOST-OFTEN-NEEDED RADIO DIAGRAMS Farnsworth Models ET-060, BT-061, ET-063, Chassis C-150 EQUIPMENT AND PROCEDURE FOR ALIGMENT A Signal Generator calibrated at 455 Kc., 600 Kc., 1000 Kc., 1500 Kc., 15 Me., 12.5 Me., and 10 Me., and an output indicator are required to properly align this receiver. All adjustments should be made with the volume control set for maximum, keeping the signal generator output as low as possible to prevent AVC action and incorrect adjustments. Connect the low side of the Signal Generator to the chassis through a .1 Mfd. condenser. Con nect the high side to antenna lead at rear of set through dummy load of 100 MMF for Broadcast and 400 ohms for Shortwave. The loop antenna should be placed in approximately the position relative to chassis as when chassis is installed in cabinet. When aligning the Shortwave Oscillator, use the peak found farthest out from maximum capacity on the oscillator trimmer. Use the peak nearest maximum capacity on the loop trimmer. TABULATION FOR ALIGNMENT STEPS ! DUMMY ANTENNA SET GENERATOR AT SET GANG AT ADJUST LOCATED TO OBTAIN 1 SET VOLUME CONTROL FOR MAXIMUM OUTPUT 2 100 MMF. 455 Kc. Minimum Capacity 2nd. I.F. Trimmers Top of I.F. Transformer Maximum Output 3 1st. I.F. Trimmers 4 1500 Kc. 1500 Kc. B.C. Osc. Trimmer On Tuning Capacitor 5 1500 Kc. 1500 Kc. B.C. Ant. Trimmer 1 On Loop Antenna 6 Check Pointer for Calibration at 1000 Kc. and 600 Kc. SHORT WAVE BAND 7 400 Ohms 15 Me. Minimum Capacity S.W. Osc. Trimmer Chassis Near Rear Maximum Output 8 12.5 Me. ISIQH S.W. Ant. Trimmer On Loop An Check 10 Me. 10 Me. Rock Gang S.W. Ant. Padder Chassis Near Front 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN