Westinghouse-Electric-Corp-WR12X5 电路原理图.pdf

《Westinghouse-Electric-Corp-WR12X5 电路原理图.pdf》由会员分享，可在线阅读，更多相关《Westinghouse-Electric-Corp-WR12X5 电路原理图.pdf（2页珍藏版）》请在收音机爱好者资料库上搜索。

1、MANUAL OF 1942 MOST POPULAR SERVICE DIAGRAMS Westinghouse Radio Models WR-12X3, 12X5 & 12X6 Five-Tube, Single-Band, AC-DC, Superheterodyne Receiver Alisnment Procedure Output Meter Alignment.If this method is used connect the meter across the voice coil and turn the receiver volume control to maximu

2、m. Test Oscillator.-Connect the low side of the test oscillator to the receiver chassis through a .01 mfd. capacitor. With the output meter alignment method the test oscillator output should be kept as low as possible. Calibration Scale.The glass tuning dial may be easily, removed from the cabinet a

3、nd temporarily attached to the dial backing plate for quick reference during alignment. STI.fr TRANS C7-C8 ASS KC. 2NO.I F TRAHS. (IZSQT cco V J ASS KC. V V Tube and Trimmer Locations SHOWN WITH Oama at max CAPACITY. Connect the high side of test* oscillator to Tune test-osc. to Turn radio dial to A

4、djust the follow* ing for max. peak output I-F grid* in series with .01 mfd. 1st Det. grid in series with .01 mfd. 455 kc Quiet point 1,600 kc end of dial CIO, C9 2nd I-F Transformer C8, C7 1st I-F Transformer Ant. terminal in series with 100 mmfd. 1,720 kc Gang at minimum C14 (osc.) Radiated signal

5、 1,300 kc Signal frequency C16 (ant.) Repeat steps 3 and 4. bottom view or TUBE SOCKETS t*Der. 4 osc. 1SA7 I.F AMFL. 1Z.5K7 aDcr., A.T., 4 A.V.C. ZSQT OUTPUT 50LVT 35Z5GT Kect. i CHASSIS GROUND COMMON WIRING INSULATED FROM CHASSIS VOLTAGES SHOULD HOLD WITHIN *20* WITH 1J7V. AC SUPPLY * STARRED VOLTAGES ARE OPERATING VOLTAGES IN CIRCUITS WITH HIGH SERIES FJ,.TACE TH TUAL MEASURED VOLTAGES WILL BE LOWER DEPENDING ON THE VOLTMETER LOADING SOL4AT tStn 2%K1 ItSWI A_A A A COMPILED BY M. N. BEITMAN. SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN