Emerson-Radio-and-Phonograph-Corp-GH2-447 电路原理图.pdf

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1、MANUAL OF 1942 MOST POPULAR SERVICE DIAGRAMS Rl, R7, ) R18, R19 J R2 R3 R4 R5 R6 R8, R16, ) R17, R20 J R9, RIO, R24 Rll R12 R13 R14 R15, R23 R21, R22 R25 R26, R27, R28 Cl, C2 C3, C16 C4 C5 C6, C7, C8, C9 Cll CIO C12 C13 C14 C15 C17 C18 C19 C20, C21, C22 C23 C24, C27, C301 C31, C32 J C25 C26 C28 C29

2、1 megohm M watt carbon resistor. 20,000 ohm M watt carbon resistor. 140 ohm % watt wire wound resistor 3 megohm H watt carbon resistor. Volume control 2.5 meg.- 10 megohm M watt carbon resistor. JsmetsonJfadto I-f and Wave-trap Alignment Swing the variable condenser to the minimum capacity posi tion

3、. Feed 455 kc to the grid of the 12SA7 tube through a .01 mf condenser and adjust the four i-f trimmers for maximum response. -190 ohm, 5 watt; R28250 ohm, 3 watt VOLTAGE ANALYSIS 500,000 ohm 14 watt carbon resistor. .01 mf condenser and adjust the four i-f trir 50,000 ohm M watt carbon resistor. re

4、sponse. 175 ohm 1 watt carbon resistor. 750 ohm 1 watt wire-wound resistor. Feed 455 kc to the external antenna lead and adjust the 10,000 ohm 14 watt carbon resistor. wave-trap for minimum response. 25,000 ohm 14 watt carbon resistor. 100,000 ohm 14 watt carbon resistor. Note: The grid of the 12SA7

5、 tube is the No. 8 pin. 100,000 ohm 14 watt carbon resistor. _ 30,000 ohm 14 watt carbon resistor. Ballast resistor: R26233 ohm, 6 watt; R27190 ohm, 5 watt; R28250 ohm, 3 watt Two-gang variable condenser.- 0.002 mf, 600 volt tubular condenser. VOLTAGE ANAI 0.0004 mf, 600 volt tubular condenser. Trim

6、mer, part of loop assembly. T. c,_. Trimmers, part of variable condenser. Tube_Scrt Trimmer, part of variable condenser. 12SA7 88 8! 0.1 mf, 200 volt tubular condenser.- -:- 0.0006 mf, 600 volt tubular condenser. 12SK7_48_4j 0.0015 mf, 600 volt tubular condenser 12SF7 89 8 0.05 mf, 400 volt tubular

7、condenser. . 0.0002 mf, 600 volt tubular condenser 12SJ7_ 8_F 0.02 mf, 400 volt tubular condenser. 50L6GT 108 8 0.00011 mf, mica condenser. - 1 0.005 mf, 400 volt tubular condenser Multiple dry electrolytic condenser: 150 volt; C2020 mf; C2180 mf; C2240 mf 0.00025 mf, mica condenser.- Tube Plate Scr

8、een 12SA7 88 88 12SK7 48 46 12SF7 89 89 12SJ7 8 14 50L6GT 108 89 Cathode 0.05 mf, 200 volt tubular condenser. 0.000026 mf, mica condenser.- 0.001 mf, 600 volt tubular condenser 0.00022 mf, mica condenser.- 0.0003 mf, mica condenser.- MODEL: GH-437,GH-447 CHASSIS MODEL: GH MODEL: GH2-447 CHASSIS MODE

9、L: GH2 18 PEAKEPAT 466K.C. I2SF7 * 12SJ 7 f7 S0U6 NUMBERS 5,43 INDICATE SPEAKER CABLE CONNECTIONS TO SOCKET -i TONE CONTROL A NO - PHONO RADIO SWITCH I BANGED TOGETHER ON J SINGLE WAFER SECTION. “i ICfan l. IwisFLJtJ zT sssr-jr#- 13 GREEN VIEW LOOKING INTO SOCKET AT PR0N6 HOLES r 4=-TftA6/Q j . N 82* l_r-V P0LARIZE0 (27 - CABLE MOTOR SWITCH CONNECTION *XX* IS REMOVED WHEN EXTRA PILOT LIGHT IS USED COMPILED BY M. N. BE3TMAN, SUPREME PUBLICATIONS 4 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