Emerson-Radio-and-Phonograph-Corp-120010 电路原理图.pdf

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1、MANUAL OF 1948 MOST-OFTEN-NEEDED RADIO DIAGRAMS Emerson Radio MODELS: 511, 517, 541 CHASSIS,MODEL: 120010 PIN NUMBER 5 TUBE 12SA7 12SK7 12SQ7 50L6 35Z5 The following voltage readings are d-c measurements taken from B (line switch) to the indicated tube-socket pin. A 1000 ohms-per-volt meter should b

2、e used for all readings except those indicated by an asterisk (*) which should be taken with a d-c vacuum-tube voltmeter. Line voltage for these readings was 117 volts, 60 cycles, a.c. Measurements made with 117 volts d-c. will be lower than those given below. Take readings with the volume control s

3、et at minimum and the variable condenser closed. if peeked at 55 kc A.C OR D CITN Schematic Symbol Part No. DESCRIPTION Cl, C2 900160 Two-gang variable condenser *C3, C4 Trimmers, part of variable condenser *C5, C6,) C7, C8 Trimmers, part of i-f transformers C9, C15 920010 0.002 mfd., 600 V. paper c

4、ondenser CIO 920240 500 mmfd., 600 V. paper condenser Cll, 02 920020 0.02 mfd., 400 V. paper condenser 03 910000 220 mmfd., 600 V. mica condenser 04 920040 0.1 mfd., 200 V. paper condenser 06 920030 0.05 mfd., 400 V. paper condenser Cl 7, 08 925000 Dual electrolytic condenser, 150 V.; C2030 mfd., C2

5、150 mfd. 09 920050 0.2 mfd., 200 V. paper condenser LI 700000 Loop antenna assembly, or LI 700200 Loop antenna assembly Rl, R9 397000 15 meg., Y watt carbon resistor Schematic Symbol R2 R3 R4, R5 R6 R7 R8 R10 Rll R12 SP1 *SW1 Tl T2 T3 T4 321330 390000 321130 340290 370490 310810 340010 397040 321050

6、 180000 720000 720100 734000 716010 583010 DESCRIPTION 3.3 meg., Y watt carbon resistor Volume control with line switch 470,000 ohms, Y watt carbon resistor 150 ohms, watt carbon resistor 1000 ohms, 1 watt carbon resistor 22,000 ohms, Y watt carbon resistor 6.8 ohms, Yu watt carbon resistor 15 ohms, 1 watt wire-wound resistor 220,000 ohms, Yu watt carbon resistor P.M. Speaker Line switch, part of volume control First i-f transformer Second i-f transformer Output transformer Oscillator Line cord 收音机爱 好者资料库 RadioFans.CN