Philco-Radio-and-Television-Corp-42-730 电路原理图.pdf

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1、MANUAL OF 1942 MOST POPULAR SERVICE DIAGRAMS ip sn a il M0DEL 42730 coDE 121 jTUlUC CON6CW 2Nsb OCT 1ST AUOfO 7C6 1500 KC. Band Switch “Erdost* Band Switch 16 & 19 M. Band Switch 25 to 31 M. Note B Note C Roll tuning cond. Note C Roll tuning cond. Roll tuning cond. Roll tuning cond. 19C, 19A 19D, 19

2、B NOTE AThe “Dummy Aerial” consists of a condenser or re- slstor connected In series with the signal generator output lead (hlghside). Use the capacity Or resistance as specified in each step of the above procedure. NOTE BDial Calibration: In order to adjust th* rectly the dial must be aligned to tr

3、ack properly with the tuning condenser. To adjust the dial, proceed as ollowe: Wth the tuning condenser closed (maximum capacity) set the dial pointer on the first mark on the left edge (low frequency end) of the broadcast scale. NOTE CWhen adjusting the oscillator compensators, be sure to tune in t

4、he fundamental signal Instead of the Image signal If the compensator is correctly adjusted the image signal will be found by turning the signal generator dial 9)0 KC. above the fundamental signal. COMPILED BY M. N. BEITMAN. SUPREME PUBLICATIONS Tuning Band Frequencies: 540 to 1720 kc. . 2.3 to 7.5 me. Spread Band 1 Spread Band 2 7.0 to 22 me. 9.4 to 12 me. 15.1 to 18 me. 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