Galvin-Mfg-Co（Motorola）-57CD2A 电路原理图.pdf

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1、Capacitors - Decimal values In MF, all others In MMF unless otherwise specified. Voltages - Measured from polnl indicated to ground with a VTVM. No signal input Tuning Range - 535 to 1620 KC. A 390 10% 1/2 watt Allen Bradley type resistor (R9) has been added to the 12CR6 tube; this resistor is wired

2、 across the filament of the 12CR6 (between pins 3 2S2f S , y cd ( V- 3 u O & o ! o u Er . o iSaSjjfi s ! *62 g S IcgfiSBg.B . t t o 3 o i o ! H ” M K iccl i O U U i C5 El 12CR6 2 3 S 2 D u P I W XTi SALIGNMENT 2ND IF 455 KC 1ST IF 455 KC BELOW GENERATOR STEP CONNECTION IF ALIGNMENT 1. I Grid of conv

3、 (pin 7, I 12BE6) thru . I mf & B- RF ALIGNMENT 2. I Grid of conv (pin 7, I 12BE6) thru . 1 mf & I B- generator FREQUENCY (400 cycle mod) GANG SETTING ADJUST 455 Kc Fully open 1, 2, 3 & 4 1620 Kc Fuliy open 5 1400 Kc Tune for max 6 ANT 1400 KC 0SC 1620 KC Adjust for maximum. Adjust for maximum. Connect generator output across 5 diameter. 5-turn loop and couple inductively to receiver loop. Keep loops at least 12 apart. 54 收音机爱 好者资料库 RadioFans.CN