Noblitt-Sparks-Industries-Inc-RE-381 电路原理图.pdf

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1、MANUAL OF 19SS MOST-OFTEN-NEEDED RADIO DIAGRAMS ARVM Industries MODEL 852P - 854P RE 381 RE 372 ALIGNMENT PROCEDURE Output meter reading to indicate . 05 watt across voice coil. 0.4V Generator ground lead connected.floating ground Generator modulation. 30% 400 cycles Position of Volume Gontrol.fully

2、 on _ . . I. Position Adjust Function of Generator Dummy Generator Trimmers of Variable Frequency Antenna Connections (In order shown) Trimmer Open 455 Kc Open 1650 Kc 1400 Kc 1400 Kc 600 Kc 600 Kc Mixer Grid * Test Loop * Test Loop * Test Loop Al, A2, A3, A4 A5 A6 Check Point I.F. Oscillator Antenn

3、a * Standard Hazeltine Test Loop Model 1150 or 3 turns of wire about 6 in di ameter placed about one foot from the set loop. I EBB aT TUBE LAYOUT m rjk TERMINAL STRIP CONNECTIONS 1. 8- 2. CHASSIS BOTTOM iEW 3. B- OF TUBE 4 A + MOUNTING 5. CHASSIS 1 PLATE 6 B + 7. 3V4 PLATE APPROX INPUT FOR 50 MILLIW

4、ATTS OUTPUT (0.A VOLT V0.CE O0IL ) 30 % MODULATION 400 CPS MiXER GRID THROUGH I F GRID THROUGH STANDARD .OOP 0 05- CONDENSER 0.05 CONDENSER SSSESoST 455KC IRS 6000 455KC IT4 V 44v * % ti y , W - 3 rjt t / LOCATION OF PARTS UNDER CHASSIS VOLTAGE REA0INGS SHOWN AT SOCKET PRONGS ARE TO B-AND ARE TAKEN

5、WITH NO SIGNAL , AC LINE VOLTAGE AT 117 V AC MEASURE0 WITH VACUUM TUBE VOLTMETER. RESISTANCE VALUES ARE IN OHMS: K 1,000, MEG.* 1,000.000, CAPACITANCE VALUES LESS THAN (i) ARE IN MlCROFARAOS, UO , ANO VALUES OP (I) OR GREATER ARE IN MICRO- MlCROFARAOS, UNLESS OTHERWISE INDICATED. 15 收音机爱 好者资料库 RadioFans.CN