RCA-Victor-Co-Inc-66-1 电路原理图.pdf

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1、MANUAL OF 1947 MOST-OFTEN-NEEDED RADIO DIAGRAMS Radiola Model 66-1 (RC-1004E) Alignment Procedure a ryt frtnnfrf fflTlS for I Cathode Ray Alignment is the preferable method. Connections for the oscillograph are shown in the diagram. Output Meter AlignmentIf this method is used, connect the meter acr

2、oss the voice coil and turn the receiver volume control to maximum. Test Oscillator.For all alignment operations, connect the low side of the test oscillator to the receiver chassis, and keep the output as low as possible to avoid AVC action. Pre-Setting Dial.With gang condenser in full mesh, the po

3、inter should be set at the left-hand end dial calibration mark. czz WAVE TRAP el7-OSC. 4-55 KC. (720 KC Dial Cord Assembly Connect high side of the test oscillator to Tune test osc. to Turn radio dial to Adjust the follow ing for maximum peak output I-F grid in series with .01 mfd. Quiet point CI4.

4、C15 (2nd I-F Trans.) 1A7GT grid in series with .01 mfd. and 750 kc C12, C13 (1st I-F Trans.) 1,720 kc Tuning condenser rotor plates ail out C17 (DSC.) Antenna terminal in series with 1,300 kc 1,300 kc signal C9 (ant.) 4SS kc Qmet point between 550 and 750 kc Adjust C22 for minimum OUtpUt on strong 4

5、55 kc signal Precautionary Lead Dress. 1. The lead from the 3Q5 plate to output transformer should be dressed under clip and away from audio input leads. 2. All filament wires should be dressed close to chassis. 3. Keep AVC lead connecting Cl (0.1 mfd. filter) to antenna coil away from the 1A7GT pla

6、te. 4. Keep blue plate leads coming from I.F. transformers short and close to chassis. 5. Keep yellow leads connected to oscillator coil away from trap coil. 6. Keep grid lead of 1N5GT RF tube away from 1A7GT grid. 7. Keep green lead from second I.F. transformer short and close to ground. ANT TO RIO

7、 I-3K- (OO KC) DO NOT CONNECT TO ROUND WHEN USING electrifier CONV. GAIN J I -4-4 .AX -4-130 X- (Goo-ASS KC) * (A55KC) * 4S5KC) MEASURED WITH 1.5 VOLT FlXEP BIAS - IA7GT IN5GT IST.OET&OSC. I. F. IHSGT ZHD OET -AF ft AVC. ATPITOX. GAIN 3Q5GT CMTA MEASURED OUTPUT WrrM RCA RideR APPROX. MAX. AVC. 收音机爱 好者资料库 RadioFans.CN