Emerson-Radio-and-Phonograph-Corp-838 电路原理图.pdf

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1、A BATTERY CONNECTOR A BATTERY OPENING gE PAIR OF MATCHED TRANSISTORS EMERSON PART NO. 815003. 1AJ5 1VG I 1AH4 I A i BATTERY 4v. -n PT. N0.8I8H3 T “ON Off VOLUME -SELECTOR SHAFT *B BATTERY 45 V. TUBE SUPPORT ACCESS PLATE C-2,C-5 -1 (5) REFERS TO TERMINAL LETTER w ON THE COUPLATC. NOTE: Pin NO. I IS N

2、EXT TO THE REO OOT ON THE TOP SIDE OF TUBE SOCKET. RESISTORS IN OHMS, CAPACITORS IN MFCS , UNLESS OTHERWISE NOTEO. CAP- COUPLING UNIT RT. NO. 923089 SHIELD-7 -B-BATTERY OPENING- VJ W ALIGNMENT INSTRUCTIONS Volume control should be at maximum; output of signal generator should be no higher than neces

3、sary to obtain an output reading. NOTE: C-5, C-2, and L-2 must be adjusted with the chassis and batteries in the cabinet. C-5 and C-2 can be adjusted by removing a small plate on the side of the cabinet by pressing it out from the inside. SIGNAL GENERATOR COUPLING High side to pin 3 (grid) of 1V6. L

4、ow side to chassis. Use a loop set per pendicular and about 20* from center of bat loop ant. in set. SIGNAL GENERATOR FREQUENCY RADIO DIAL SETTING 455 KC. Tuning con denser fully open. 1640 KC. Tuning con denser fully open. 1400 KC. Tune for maximum output. 600 KC. Tuning con denser set for 600 KC.

5、1640 KC. Tuning con denser fully open. OUTPUT METER ADJUST T2 and T1 (osc. trimmer) REMARKS Adjust top and bottom of each for maximum output. Fashion loop of several turns of wire and radiate signal into bat loop of re ceiver. Adjust for maxi mum output. Adjust for maximum output. (Ant. I trimmer) Osc. Rock the variable cond. slug in each side of 600 KC while L-2 adj. osc. slug for maximum response. C-5 Osc. If readjustment is necessary trimmer repeat steps 2 to 4 until no further improvement is noted. 33 收音机爱 好者资料库 RadioFans.CN