Emerson-Radio-and-Phonograph-Corp-120178 电路原理图.pdf

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1、MANUAL OF 19S4 MOST-OFTEN-NEEDED RADIO DIAGRAMS Emerson MODEL 747 OPT INDICATES POSITION OP NUNDER-1 PIN _ Em A*. UH4 CHASSIS 120178 ,A*4 EZD H lJ4 LJ UMCniK OF CHASSIS ALIGNMENT INSTRUCTIONS 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 a

2、djusted by removing a small plate on the side of the cabinet by pressing it out from the inside. See Fig. 3. SIGNAL GENERATOR COUPLING High side to pin 3 (grid) of IV6. Low side to chassis. Use a loop set per pendicular and about 20* from center of bar loop ant. in set. SIGNAL GENERATOR FREQUENCY RA

3、DIO 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. 1640 KC. Tuning con denser fully open. T2 and T1 REMARKS Adjust top and bottom of each for maximum output. Fashion loop of several

4、 (osc. turns of wire and radiate trimmer) signal into bar loop of re ceiver. Adjust for maxi mum output. (Ant. trimmer) Osc. slug in L-2 Adjust for maximum output. Rock the variable cond. each side of 600 KC while adj. osc. slug for maximum response. C-S Osc. If readjustment is necessary trimmer rep

5、eat steps 2 to 4 until no further improvement is noted. COUPLATE PART NO. DSDOM SHIELD -7 * i-nn / C-IT IOO C-N yj / C-14 .001 NNF .01 SSf / -004 H-T-HII| Hf-/ HH (a) nepers to terminal letter ON THE COOPLATE. RESISTORS IN OHMS, CAPACITORS IN MPDS. UNLESS OTHERWISE NOTED. A BATTERY . 1.5 V. PT. NO. SISIOS BATTERY 45V. + | PT. NO. SISIIO S.SW-1 B I MOTE: PIN NO. I IS NEXT TO ON THE TOP SIDE OP THE RED DOT TUSE SOCKET. 收音机爱 好者资料库 RadioFans.CN