Galvin-Mfg-Co（Motorola）-409 电路原理图.pdf

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1、ELECTROLYTIC MANUAL OF 19S0 MOST-OFTEN-NEEDED RADIO DIAGRAMS (g/ftotiho&i &u!. MODEL 409 SENSITIVITY CONTROL. This control must be set to provide 211/2 volts bias on the RF tubes before alignment is started. Measure this voltage between sensitivity control terminal and chassis. For greatest accuracy

2、, keep output of receiver at approximately 1 watt (1 watt - 1.79 volts on output meted throughout alignment hy reducing gen erator output (not receiver volume control) as stages are brought into alignment. IF ALICNMENT A. Connect high side of signal generator through .1 mf capacitor to 6BE6 grid (pin %7) and the low side to chassis. Set generator to 455 Kc and peak adjustments (1, 2, 3 & 4), in this order, for max- irouro output. B. Check alignment by repeating procedure. I i w:n * 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN