General-Electric-Co-LB-530 电路原理图.pdf

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1、POWER SELECTOR SWITCH OPERATION POOTION CONTACTS CONNECTED OFF ALL CONTACTS OPEN BATTERY #1 to #8, #4 to #5, #7* to tt AC #1 to #2 to #3, Mto #5; #8 to #9 CHARGE #2 to #3, #9 to f9 * #7 terminal li not connected to circuit I .F . 455 KC. Stock No. j Symbol i RC-7054 1 C-l. 2 RC-216 C-7 RC-235 i C-8,

2、 9 RC-072 C-I0 RC-096 C-II RC-023 C-12. 13 RC-039 C-14 RC-096 C-15 RC-072 , C-16 RC-027 1 C-17 RC-235 C-18 RC-156A /: C-19, 20 C-2IA, 2IB RC-5189 | i RC-156AS C-21C C-22 RC-092 C-23 RV-125 R-l RQ-1315 R-2 RQ-I299 i R-3 RQ-I339 ! R-4 RQ-I293 1 R-5 RQ-I299 | R-6 RQ-1347 I R-7 Description CONDENSERTuni

3、ng condenser n4 W. carbon) RESISTOR27.000 ohm. H W. carbon IRESISTOR17.000 ohm. H W. carbon RESISTOR4.7 megohm. 4 W. carbon! $1.55 .25 .25 .25 .30 .25 .30 .25 .45 .95 .705 .705 .705 ,705 .705 .705 RV-204 RR-802 R S-1066 Symbol Description List Price R-8 R-9 R-10 R-1I, 12. B-1 L-l L-2 L-5 L-6 L-7 L-8

4、 SWl T-I T-2 T-3 T-3 T-4 T-5 X-l Spkr RESISTOR2.2 megohm. H W. carbon1 RESISTOR1.000 onm, WW. carbon. 13 IRESISTOR8.2 ohm, H W. carbon , . . (CELL5.0 V. bias cell assembly. BEAM-A-SCOPELoop antenna as sembly (inside cover). COILOscillator coil.1 CHOKEB choke. CHOKEVibrator choke . BEAM-A-SCOPEExtern

5、a! loop an-. tenna. CHOKEFilament supply choke.I SWITCHPower selector switch.1 TRANSFORMEROutput transformer VIBRATORVibrator power transform-; I er.J 1.8 TRANSFORMER50-60 cycle recti fier step-down transformer.1 1.2 TRANSFORMER25 cycle rectifier i step-down transformer .I TRANSFORMERUt I.P. transfo

6、rmer .9 TRANSFORMER2nd I.P. transform-1 VIBRATORPower supply synchrony . ous vibrato*.I 3.61 RECTIFIER-Copper oxide rectifier. . .2 (SPEAKERIM speaker.j 4.6 .705 .705 .705 .90 .30 .20 .45 .20 .70 All power necessary for the operation of the receiver is supplied by the 2-volt built-in rechargeable ba

7、ttery. The tube filaments are heated directly by the two volts from the battery while the necessary high voltage for the screen and plates- of the tubes is furnished by a synchronous vibrator used in conjunction with a step-up power transformer and its associated filter circuit. The synchronous vibr

8、ator operates on the two volts from the battery. Provision has been made to charge the battery directly from the house current without removing the battery from the receiver circuit. Two charging positions are provided on the four-position power selector switch. The “Charge” position of this switch

9、allows the battery to be charged at the rate of approximately 1.35 amperes from the house current during the period that the receiver is not being operated. The “AC” position of the switch allows the receiver to be operated at the same time that the battery is being charged. Under this condition, ho

10、wever, it takes a considerably longer period for a partially discharged battery to be fully restored due to the fact that current is taken from the battery to operate the receiver. GENERAL ELECTRIC MODEL LB-530 COMPILED BY M. N. BEITMAN, SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN