Emerson-Radio-and-Phonograph-Corp-DU-379 电路原理图.pdf

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1、BATTERY SWITCH ON VOLUME CONTROL Ll L2 L2 Tl T2 T3 Rl R2 R3 R4, R12 R5 R6 R7, R9 R8 RlO Rll Cl, C2 tC3, C4 C5, C9, C15 C6, C12, C14 tC7, C8, Cll CIO C13 C16, C17 7UT-542 7UW-236 7UW-296 7UT-539 7UT-540 7UT-541 KR-54 LR-64 LR-65 3RR-274 7UR-380 3RR-274 NNR-220 KR-57 7UR-394 7UR-392 7UC-469 FC-29 5LC-

2、410A 7UC-476 3HC-274 NNC-199 Iron core loading coil (379) SPRING CLIPS FASTENED ON_- IL ,1- Shoulder strap loop assembly CHASSIS- 2 VQLT . . CELL CELL Loop antenna (380)- Oscillator coil .-.-. .Ly-1- Iron core double-tuned 455 kc first i-f transformer Iron core single-tuned 455 kc second i-f transfo

3、rmer 100,000 ohm watt carbon resistor._. 5,000 ohm )4 watt carbon resistor. 10,000 ohm )4 watt carbon resistor. 5 megohm )4- watt carbon resistor. Volume control 1.5 megohm with double pole battery switch 10 megohm (4 watt carbon resistor.- 3 megohm 1-4 watt carbon resistor. 1 megohm 34 watt carbon

4、resistor- 2200 ohm )4 watt carbon resistor. 1800 ohm M watt carbon resistor.-. Two-gang variable condenser .-. Trimmers, part of variable condenser. 0.02 mf, 200 volt tubular condenser. 0.00011 mf mica condenser.- Fixed trimming condensers, contained inside i-f cans. 10 mf, 100 volt dry electrolytic

5、 condenser.-. 0.002 mf, 600 volt tubular condenser.-. 0.001 mf, 600 volt tubular condenser. 67/2 VOLT B BATTERY Emerson Radio Models DU-379 DU-380 Readings should be taken with a 1000 ohms-per-volt meter. Voltages listed are from point indicated to chassis with volume con trol turned on full and no signal. The battery voltages for these readings were: “A” 1.5 volts, “B” 67.5 volts. All readings except filaments were taken on the 250 volt scale, with battery saver “out.” 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