General-Electric-Co-621 电路原理图.pdf

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1、MANUAL OF I9S4 MOST-OFTEN-NEEDED RADIO DIAGRAMS GENERAL ELECTRIC MODEL 620, 621 AND 622 PORTABLE RADIO RECEIVERS GAINS FOR NORMAL BATTERY OPERATING POSITION VI IRS OSC. CONV V3 IU5 DEI- AUDIO 1.8 VAC AT PIN6 FOR 0.4VAC ACROSS LSI- 14000) RMS AUDIO OUTPUT UNLESS OTHERWISE NOTED, CARAClTOR VALUES LESS

2、 THAN THE UNIT I ARE MF, VALUES MORE THAN I ARE MMF. RESISTANCE VALUES ARE OHMS K-IOOO M-1,000,000. VOLTAGES ARE DC TO CHASSIS GROUND, METER SENSITIVITY 20,000 OHMS/VOLT. ALIGNMENT _ I-F -PEAK TI.T2 0455KC R-F I.PEAKCID I620KC GANG OPEN. 2. PEAK CIB 1500 KC ROCK GANG. 3. PEAK IRON CORE T4600KC ROCK

3、GANG- 4. REPEAT AS necessary. A+ A-jP-7J79 A BATTERY ( CONNECTOR IU5 DET-AVC 1ST AUDIO SEC. TOP PRI. BOTTOM OUTPUT CAPACITORS OSC. CONV. RESISTORS Move clips to the center set of holes for use with flash light cells. RCC-121 05 .01 mf., 200 v., paper RCC-122 08 .047 mf., 200 v., paper RRC-239 H5, RC

4、C-123 C12 .022 mf., 200 v., paper S2A,B RCE-172 C14 10 mf., electrolytic *URD-027 Rll RCH-O82 C11A, Ceramic Bullplate *URD-04l R7 B,C,D *URD-06l R2,4 RCT-075 Cl Tuning *0RD-077 R3 *RCW-3075 02 47 mmf., ceramic 0RD-097 R1 *RCW-3078 06 2.2 mmf., 5$, 500 v., ceramic ORD-121 R9 RCW-3118 07 .003 mf., 5$, 500 v., ceramic 0RD-137 R8 RCW-3119 013 .002 mf., 5$, 500 v., ceramic 0RD-145 r6 VOLUME CONTROL & SWITCH - 1 megohm 120 ohms, carbon 470 ohms, carbon 3.3 K, carbon 15 K, carbon 100 K, carbon 1 megohm, carbon 4.7 megohms, carbon 10 megohms, carbon SI 收音机爱 好者资料库 RadioFans.CN