Emerson-Radio-and-Phonograph-Corp-FH413 电路原理图.pdf

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1、MANUAL OF 1942 MOST POPULAR SERVICE DIAGRAMS CIO IS COMPOSED OF TWO EXTERNAL MODELS: FH-413 and FH-440 5 C0NDENSER 6SD7GT I F PEAKED AT 455 K.C 6SK7GT 6SQ7GT Si Tube Plate _Screen | Cath 6SG7,6SD7 or 7H7 92 63 j_0_ 6J5 102_ 1_0_ 6SK7 or 7A7 102_102_0_ 6SQ7 or 7B6_30_ 1_ 25 L6 92_102_6-5 Alignment Sw

2、ing the variable condenser to the minimum capacity posi tion. Feed 455 kc to the grid of the 6SD7 tube through a .01 mf condenser and adjust the four i-f trimmers for maximum response. Note: The grid of the 6SD7 tube is the No. 4 pin. Rotate the wave-band switch counter-clockwise to the short wave p

3、osition. Set the dial pointer at 12 megacycles and using a 400 ohm carbon resistor as a dummy antenna feed 12 mega cycles from the generator to the external antenna lead emerging from the rear of the chassis. Adjust first the short-wave oscillator trimmer and then the short-wave antenna trimmer for

4、maximum response. Rotate the wave-band switch clockwise to the broadcast posi tion. Set the dial pointer at 160 and feed 1600 kc from the signal generator into a loop of wire about 12 inches in diameter. Hold this radiating loop about 12 inches from the loop antenna and advance the signal generator

5、until a deflection is obtained on the output meter. Adjust first the oscillator trimmer (rear section of the variable condenser) and then the antenna trim mer (front section of the variable condenser) for maximum response. Rl, Rll R2 R3, R4 tC6 fC7, C8, C9 too Ol, C20 05, 07 06, 08, C21 C28 09, C25

6、C22 C26, C27 50,000 ohm M watt carbon resistor. 5,000 ohm M watt carbon resistor 3 megohm M watt carbon resistor. 50,000 ohm M watt carbon resistor Volume control: .5 megohm 10 megohm M watt carbon resistor. 500,000 ohm M watt carbon resistor Tone control: 400,000 ohm 140 ohm % watt wire-wound resis

7、tor Ballast resistor, 155 ohm Trimmer, part of T4. Trimmers, part of i-f transformers. Trimmer and 0.0001 mf, mica condenser 0.002 mf, 600 volt tubular condenser 0.02 mf, 200 volt tubular condenser 0.05 mf, 200 volt tubular condenser. 0.02 mf, 400 volt tubular condenser 0.00022 mf, mica condenser 0.

8、05 mf, 400 volt tubular condenser 0.00011 mf, mica condenser 0.00046 mf, mica condenser 0.1 mf, 200 volt tubular condenser. 0.01 mf, 400 volt tubular condenser Dual 20 mf, 150 volt dry-electrolytic 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 收音机爱 好者资料库 RadioFans.CN