Sylvania-Electric-Products-454 电路原理图.pdf

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1、MANUAL OF I9S4 MOST-OFTEN-NEEDED RADIO DIAGRAMS QVIVA1VIA RADIO CHASSIS 1-606-1 OIIMIMMIY MODEL 454 PORTABLE RADIOS STEP SIGNAL Freq. GENERATOR Connection TUNING CAPACITOR SETTING ADJUST COMMENTS 1. 455KC Modulated Hot side through ,01Mfd.to pin 6of 1R5 Osc. - Mixer, ground to chassis. Tuning Capaci

2、tor plates fully open. T2D T2C TIB T1A Adjust T1 and T2 for maximum out put indication. Reduce output of sig nal generator, as alignment progress- ses, to prevent overload of receiver. 2. 1700KC Modulated Tuning Capacitor plates fully open. C5 Osc. Trimmer for maximum. These are preliminary adjustme

3、nts only, and locate approximate settings ofC5 andL2. Steps 4, 5 and 6 must now be observed. 3. 530KC Modulated Radiated to re ceiver through loop of several turns. Position where signal nal generator output is heard. L2 Osc. Slug for maximum. 4. 1450KC Modulated C5 Osc. Trimmer for maximum. Rock tu

4、ning capacitor while adjusting C5 and L2 at respective frequencies, until no further increase of output is obtained with a given level of signal generator output. 5. 600KC Modulated. L2 Osc. Slug for maximum. 6. Steps 4 and 5 must be repeated until maximum output is obtained. 收音机爱 好者资料库 RadioFans.CN