WT-Grant-Company-500 电路原理图.pdf

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1、MANUAL OF 1947 MOST-OFTEN-NEEDED RADIO DIAGRAMS W. T. GRANT COMPANY SIGNAL GENERATOR frequency Dummy Antenna Connection to Radio 455 kc .1 mf Metal antenna plate 1720 kc .1 mf Metal antenna plate 1720 kc 200 mmf External antenna clip 1400 kc 200 mmf External antenna clip 1720 kc 200 mmf External ant

2、enna clip Models 500 and 501Series A Ground Connection 12SQ7 Pin 3 12SQ7 Pin 3 12SQ7 Pin 3 12SQ7 Pin 3 12SQ7 Pin 3 TUNER SETTING Iron cores all the way out Iron cores all the way out Iron cores all the way out Turn dial to 1400 kc Turn dial to 1720 kc ADJUST TRIMMERS MAXIMUM OUTPUT (in order shown)

3、Trimmers on output and input I.F. cans Oscillator trimmer C6 Antenna trimmer C2 Adjust position of ant. coil (see coil assembly view) Antenna trimmer C2 VOLTAGES MEASURED WITH lOOO OHM PER VOLT VOLTMETER BETWEEN SOCKET TERMINALS SB 50L6GT After the antenna coil has been tracked at 1400 Kc. it is nec

4、essary to check the antenna trimmer (C2) adjustment again at 1720 Kc. If no appreciable change in trimmer adjustment is made the coil is in track, if the trimmer requires considerable change it will be necessary to again adjust the position of the antenna coil at 14C0 Kc. These two adjust ments shou

5、ld be tried several times until no change of trimmer adjust ment is required at 1720 Kc. W Io ej 0 I2SK7 0 lEj I2SA7 I2SQ7 35Z5GT REAR OF CHASSIS (a-CANNOT sc read with VOLTMCTER. 0)-H7VA.C. BCTWCEN pins oo. e)-l2VAC eCTWEEN PNS MlH. ej-voi.ts osollator grid voltage fc) - V A AETWEEM H & H SHOOUD OE

6、 MEASURED WITH AN RE ICJ 3ZVA C BETWEEN PINS HSH. PLACED IN SERIES WiTH THE VOLTMETER LEAD DIRECTLY AT PIN AC LINE VOLTAGE 117 VOLTS POWER CONSUMPTION 30 WATTS. I2SA7 CONVERTER I2SK7 I. F. AMP. SEE ALIGNMENT CHART TO ADJUST /A/TCOIL ASSEMBLY . MOVE UP - K OR DOWN THIS STRING 1$ 3 INCHES LONG 2ND. DET A-V.C- a 1ST AUDIO r.) 50L6GT OUTPUT 105*125 VOLTS A.C.D.C. I2SQ7 I2SA7 I2SK7 50L6GT &7 A 2A7 .2A7 7 WV .w N OFF a ON J SWITCH ON VOLUME CONTROL 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