Emerson-Radio-and-Phonograph-Corp-FP421 电路原理图.pdf

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1、MANUAL OF 1941 MOST POPULAR SERVICE DIAGRAMS extern&l EMERSON RADIO AND PHONOGRAPH CORPORATION EXTERNAL ANTENNA CONNECTION I.F. PtAKE 0 AT 455 K.C I2SA7GT _I2SK7GT I2SQ7GT I lesT o) (o Jp7 I ! CL ol = JC9 I _T 50L6GT OUTPUT transformer ON SPEAKER capacity coupling WOUND IN COIL I I CI 0 R0 R3 A.C. O

2、R D.C. LINE 35Z5GT SPEAKER FIELD 450 OHMS C20 R1 LR-60 R2, R6 4XR-327 R3 3FR-293 R4 NNR-220 R5 9PR-447 R7, R8 KR-56 Cl, C2 9PC-533 C3, C16 3HC-274 C4 5AC-384 C5, Cll C6, C7, C8, C9 CIO AC-6 C12 9PC-544 Tube 12SA7GT 12SK7GT 12SQ7GT 50L6GT 20,000 ohm 34 watt carbon resistor 15 megohm 34 watt carbon re

3、sistor 140 ohm 34 watt wire-wound resistor 3 megohm 34 watt carbon resistor Volume control .5 megohm 500,000 ohm 34 watt carbon resistor Two-gang variable condenser 0.002 mf, 600 volt tubular condenser. 0.0002 mf, 600 volt tubular condenser Trimmers, part of variable condenser. Trimmers, part of i-f

4、 transformers. 0.1 mf, 200 volt tubular condenser 0.04 mf, 200 volt tubular condenser te Screen Cathode J 88 0 5 88 0 0 5.6 3 o 3 o o 3 Emerson Radio Models FP-421 FP-422 VOLTAGE ANALYSIS Voltage at 35Z5 cathode120 volts. Voltage across speaker field32 volts. Voltage across pilot light4.5 volts. COMPILED BY M. N. BEITMAN, SUPREME PUBLICATIONS 4 m 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN