Noblitt-Sparks-Industries-Inc-RE-375 电路原理图.pdf

MANUAL OF 19SS MOST-OFTEN-NEEDED RADIO DIAGRAMS ARVIN Industries MODEL 850T -853T RE 375 ALIGNMENT PROCEDURE Output meter connection.Across speaker voice coil Output meter reading to indicate 500 milliwatts (standard output). . 1.26 volts Connection of generator ground lead.Floating ground Generator modulation. 30% 400 cycles Position of volume control. Fully clockwise Position Frequency Generator Trimmers Adjusted Function of of Dummy Output in Order Shown for of Variable Generator Antenna Connection Maximum Output Trimmer Open 455 . 05pf Pin 7 12BE6 Al, A2, A3, A4 I.F. Open 1650 * Test Loop A5 Oscillator 1400 1400 * Test Loop A6 Antenna 600 600 * Test Loop Check Point * Standard Hazeltine Test Loop Model 1150 or 3 turns of wire about 6 in di ameter placed about one foot from the set loop. The alignment procedure should be repeated in the original order for greatest accuracy. Always keep the output from the signal generator at its lowest pos sible value to make the AVC action of the receiver ineffective . ij ri Is*) u TUBE LAYOUT ajTPuT u2S wlw ACR0SS V0,CE LOCATION OF PARTS UNOER CHASSIS VOLTAGE READINGS SHOWN AT SOCKET PRONGS ARE TO 8-AND ARE TAKEN V.TH f.Q SIGNAL. LINE VOLTAGE AT 117 V AC MEASURED WITH VACUUM TUBE VOLTMETER RESISTANCE VALUES ARE IN OHMS K 1000, MEG 1,000.000. CAPACITANCE VALUES LESS THAN 1 I ) ARE IN MICROFARADS. (<), AND VALUES OP < l ) OR GREATER ARE IN MICRD- HlCROPARAOS, UNLESS OTHERWISE INOICATEO 8- -LCHASSIS 13 收音机爱 好者资料库 RadioFans.CN