Belmont-Radio-Corp-579 电路原理图.pdf

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1、;nli5 c cl 1C3 (MW C6 mm WPt,0 SWC,8_ M3; 3) ! /_. ? CONTBOLS R9; + FIELoffl* R4$ VIBRATOR + i _ 6 VOLTS I.F. 465 K.C. Circuit Diagram Ref. Part No. No. Description RESISTORS R1 13011 250M ohm A w. R2 130236 30M ohmA w. R3 130307 15M ohm1 watt R4 13060 100 ohmA w. R5 13060 100 ohmA w. R6 13070 500 o

2、hmA w. R7 1304 3 megohmA w. R8 101110 1 megohm volume R9 130257 5 megohmA w. R10 13011 250M ohmA w. Rll 1303 500M ohmA w. R12 130199 1500 ohm1 watt R13 130308 750 ohm1 watt R14 130174 50 ohmA w. Circuit Diagram Ref. Part No. No. CONDENSERS C 10269 2 gang variable condenser Cl 1293 .00002 mica C2 100

3、55 .01 x 400 volts C3 12434 Adj. Antenna Trimmer C4 12921 .0002 mica C5 100115 .05 x 400 v. C6 1009 .05 x 200 v. C7 10020 .1 x 200 v. C8 10034 .005 x 1200 v. T1 11195B T2 110146 T3 108139 T4 108121B T5 104131 T6 10567 T7 114114-R LI 10568 L2 10566 SI PI vm S.P. rf749 *1- Jj212 IE5 S-PT TO CHASSIS GR

4、OUND Description .00025 mica .0001 mica .002 x 600 v. .5 x 120 v. .0005 mica 15 ufd. lytic x 350 w. v. .5 x 120 v. .01 x 200 v. 15 ufd. lytic x 350 w. v. 20 ufd. lytic x 25 w. v. .01 x 600 v. C14, C17 and C18 in same unit Antenna Coil Oscillator Coil Input L F. Coil461 kc. Output I. F. Coil465 kc. P

5、ower Transformer Output Transformer 5 Dynamic Speaker (5.6 ohm “A” Choke rtA Choke Switch on volume control Pilot light (TS1) 6-8 volts (2) Spark Plates BOTTOM VIEW OF CHASSIS 6K6G 6SA7 , VOLTAGES MEASURED C 65VC -ev.cj WITH 1000 OHM PER Y #V tfWSl VOLT VOLTMETER U W leeu/gr SM BETWEEN SOCKET L i TE

6、RMINALS & CHASSIS. I6&V 205V. .t5 0 a TERMINALS & CHASSIS. 6SK7 165V. 0 85VY/3j 3 V. A 6SQ7 a1 65 V. w2/ REAR OF CHASSIS The ignition system of every automobile generates high frequency electrical disturbances which interfere to some ex tent with the operation of tne radio receiver. This disturbance

7、 arises from the ignition Coil, the distributor and associated wir- Q ing. It must either be suppressed at its origin or must be / prevented from feeding into the input of the radio receiver RESET through the common storage battery. By proper shielding screw and by-passing these disturbances are prevented from entering c the received. VOLUME CONTROL .8, ON & OFF SWITCH “ COMPILED BY M. N. BEITMAN. SUPREME PUBLICATIONS DIAL TUNING A B 收音机爱 好者资料库 RadioFans.CN