Emerson-Radio-and-Phonograph-Corp-FL-418 电路原理图.pdf

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1、MANUAL OF 1942 MOST POPULAR SERVICE DIAGRAMS EXTERNAL* antenna CONNECTION 7B7 S3 I2SA7 C9 IS COMPOSED OF TWO PARTS. A FIXEO CONDENSER AND TRIMMER._ l.E PEAKED AT 455 K, UNE SWITCH ON VOLUME CONTROL EMERSON RADIO FL-414, FL-415, FL-416, FL-417, FL-418 and FL-419 20,000 ohm 34 watt carbon resistor._ 1

2、0 megohm 34 watt carbon resistor_ 140 ohm 3i watt wire-wound resistor., 3 megohm 34 watt carbon resistor- Volume control .5 megohm 15 megohm 34 watt carbon resistor. 500,000 ohm 34 watt carbon resistor 50,000 ohm 34 watt carbon resistor 10,000 ohm 34 watt carbon resistor- 25,000 ohm 34 watt carbon r

3、esistor_ 1 megohm 34 watt carbon resistor. Two-gang variable condenser.- 0.002 mf, 600 volt tubular condenser. 0.0002 mf, 600 volt tubular condenser 0.05 mf, 200 volt tubular condenser_ Trimmers, part of i-f transformers. Trimmer and fixed condenser Trimmers, part of variable condenser. 0.00022 mica

4、 condenser. 0.05 mf, 400 volt tubular condenser 0.00011 mica condenser._ 0.02 mf, 400 volt tubular condenser 0.03 mf, 400 volt tubular condenser OUTPUT TRANSFORMER ON SPEAKER R4 R5 R6 R7, R8 R9 R10 Cl, C2 C3, 06 C4 C5, 03 C6, C7, C8 C9 CIO, Cll 02 04 05, 09 07 08 C20, C21 Location of Coils and Trimm

5、er Adjustments The first i-f transformer is mounted on top of the chassis deck to the left of the variable condenser. The trimmers are accessible through holes in the top of the can. The second i-f transformer is mounted on top of the chassis between the 7B7 tube and the speaker. The trimmers are ac

6、cess ible through holes in the top of the can. The 455 kc wave-trap is located below the chassis deck. The trimmers for the antenna and oscillator coils are located on the variable condenser. The trimmer on the front section is for the oscillator coil. The oscillator coil is located underneath the chassis. The loop antenna acts as the antenna coil. VOLTAGE ANALYSIS Voltage at 35Z5GT cathode120 volts. Voltage across speaker field32 volts. Dual 20 mf, 150 volt dry electrolytic Voltage across pilot Kght4.5 volts. COMPILED BY M. N. BEHMAN. SUPREME PUBLICATIONS 41 收音机爱 好者资料库 RadioFans.CN