Sylvania-Electric-Products-598 电路原理图.pdf

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1、MANUAL OF 1955 MOST SYLVANIA RADIO I /.5 mm il.l V- I B0 an! 96 收音机爱 好者资料库 RadioFans.CN MANUAL OF I9SS MOST-OFTEN-NEEDED RADIO DIAGRAMS SYLVANIA Chassis 1-602-4, 1-602-5, 1-602-6, 1-602-7, used in Models 548, 518, 598, 5484 (Continued from previous page.) ALIGNMENT PROCEDURE Set generator for an RF

2、output signal amplitude Use either an audible check or connect an AC modilated (AM) with 400 cycles. voltmeter across speaker voice coll to Indicate volume. STEP ALIGNMENT SETUP NOTES TEST EQUIPMENT HOOKUP ADJUST 1. Set radio variable tuning cap acitor to minimum capacity (tuning capacitor plates fu

3、lly open). SIGNAL GENERATOR-hot lead through . 01 mfd. capacitor to pin 7 of VI, 12BE6: ground lead to negative B In receiver. Set generator to 455 KC. AC VOLTMETER - across radio speaker voice coil. T2-D for MAXIMUM output. T2-C for MAXIMUM output. Tl-B for MAXIMUM output. Tl-A for MAXIMUM output.

4、Repeat for optimum per formance. 2. Set radio variable tuning cap acitor to minimum capacity (tuning capacitor plates fully open). SIGNAL GENERATOR - radiate signal to re ceiver through a loop of several turns of wire. Set generator to 1650 KC. AC VOLTMETER - across radio speaker voice coll. C5 trim

5、mer for MAXIMUM output. 3. Set radio variable tuning cap acitor so plates are meshed approximately 3/16 Inch. Ad just this setting slightly to eliminate any interfering sig nals. SIGNAL GENERATOR - radiate signal to re ceiver through a loop of several turns of wire. Set generator to a frequency cor responding to receiver tuning capacitor setting or until signal Is heard through radio speaker. AC VOLTMETER - across radio speaker voice coil. C2 trimmer for MAXIMUM output. RARTS LAYOUT- MODEL 598 收音机爱 好者资料库 RadioFans.CN