RCA-Victor-Co-Inc-RC-540 电路原理图.pdf

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1、收音机爱 好者资料库 RadioFans.CN PAGE 656-C MODEL V -loi Chassis No. RC -540 Six -Tube, Broadcast -Band, A -C, Radio as far away from heater and power leads and the .25 of condenser as possible. The IO meg. must be very short and dressed also against the grid, away from the 2nd IF transformer. 2. Dress the y

2、ellow lead between 2nd IF transformer and the switch as far away as possible from 10 meg. and .01 of on 6SQ7 grid. 3. Dress the bus between 6SK7 plate and 2nd IF transformer toward front apron and as far away from the 6SQ7 as possible. 4. Dress the red lead between the rectifier and the switch again

3、st the corner of the chassis and front apron. 5. Dress the green 6SA7 control grid lead; close to chassis and as far away from the blue plate lead as possible; the latter also down against the chassis and as short as possible. 6. The brown heater leads, black, and brown pilot light leads, and all po

4、wer and output leads must clear resistors and condenser on the 2nd IF transformer by at least 3 -in. Especially the heater lead between 25L6GT and 6SK7, which must be dressed against the rear apron. 1 .005 MFO 3% 400 KC.) BOTTOM VIEW OF TUBE SOCKETS LOOP L2 IA 0 r 3V BPI =- FwN 7 CONVERSION GAIN 100

5、 X (600. 455 KC. -5V FIXED 51S 6 5A7 1-T D ET, 05C. ei MFD. rb1.osRls 2011 CE4 SooiC. C2E 1 3575GT 3SZ567 L4-OEC,e7-7,. 7-1. /-ii GOO KC. e5A7 6507 25L6GT V-SOTTOM./ / L,l.,BO,Yc 4EE KC. 4R 65K7 RE3iSTOR 1466892-1I LOOP 7 55 60 10 10 III I20 Ill -I II I II I I I II I II I 1 1 1 1 1I 11I1111 I I I111

6、1I I 111111 11IIIIIIII11 INCHES 1 2 3 4 0.6 300 -I- 1X I 30 x - (455 KC.) (455 KC.) I (455 KC.) (400 w. ) -3V. FIXED BIAS 65K7 65Q7 I. 2N-P DET-A.F-AV.C. oMoGR CO. 125v. RTKAi. wNHS TO TERNINAL vERTICALO To -BICMRION BUS) SIW CATHODE CURRENTS ) G5A7 - - - 5.5 HA. 121 6507 - - - IO.O NA. 507 - - - .3

7、MA 2. (41 SLGGT - - 56.0 Nw. 151 SEr56T - - S1. OMA. S1.OMA. C125 O.iS. C2e 120 A 7A e 2.2 35ZSGT RE T. 220V SLOE 30 RFD. IC20 - ISO RIT 820043 R15-% VOL. CONTR. 250.002 R IB 22,0004 .O C9 OFD R 470,000 PHONO RADIO ,20 ore Lout SOFT uL MELLOW MELLOW VOLUME) PHONO -RADI TUNING CONTROL POWER- TONE CON

8、TROL CONTROL 10% APPROX. GAIN (400 .v1 DATA FOR RCA RDER CHANALTST 25L6GT OUTPUT C19_ 680 M.T R7 470,000L CBoREBi MED. t,SRN 109 11 RL7E54 025 MEO. FRONT VIEW RADIO-P00N0 -TOME S POWFR Swell SHOWN IN OFF POSITION. LIO r FIELD DA PILOT L a 35x5GT 0eALLAs7 RECT. RESISTOR VOLTAGES SHOULD HOLD WITHIN 20% WITH 117 v. AC. SUPPLY. MEASURED WITH CHANALVST OR VOLTOMMYST. 2 1 S 1 G SLACK PICKUP + ilNED BROWN 34A. TOTAL SR REAR T-55557-2 收音机爱 好者资料库 RadioFans.CN