Montgomery-Ward-and-Co-14BR-521A 电路原理图.pdf

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1、ANTENNA PLATE Ok -L C9 CONVERTER l. F. AMR 2ND. OET. A.V.C. OUTPUT kL/ T (2/ fo) 1 1ST -AUDIO C |4 MANUAL OF 1942 MOST POPULAR SERVICE DIAGRAMS WARDS AIRLINE RADIO I2SA7 I2SK7 I2SQ7 50L6GT I2SK7 50L6GT cl0 35Z5GT cl RECTIFIER 105-125 VOLTS A.C. D.C. TECHNICAL DATA POWER CONSUMPTION 35 WATTS POWER OU

2、TPUT I WATT undistorted SENSITIVITY TOR .05 WATTS OUTPUT 30 MICROVOLTS AVE. SELECTIVITY 85K.C.AT iooox signal AT 1000 K.C. TUNING RANGE 535 TO 1720 K.C. INTERMEDIATE FREQUENCY 455 K.C. I2SQ7 I2SK7 LSAZyV I I2SA) 50L6GT CONDENSERS l OFF-ON SWITCH ON VOLUME CONTROL C15 B 10026 .02 x 400 v. C3 and C7 a

3、re in same unit RESISTORS Cl BE131262 .00001 washer condenser (antenna clip on back plate) C8 and C9 are in same unit PARTS a BE129114 .0003 mica R1 BE 130176 20M ohm54 w. a BE 124137 Trimmer on antenna coil T1 BE115597-18 Antenna plate (Walnut) R2 BE130100 ISOM ohm54 w. C4 BE1009 .05 x 200 v. or BE

4、U5597-9 Antenna plate (Ivory) R4 B El30279 1M ohm1 w. CS BE12939 .00005 mica T2 BEU1181 Antenna permeability coil RS BE1304 3 megohm 54 w. C6 BE10091 .15 x 400 v. T3 BE110153 Oscillator permeability coil R6 BE101255 500M ohmVolume C7 BE124137 Trimmer on oscillator coil T4 BE108157-H Input I.F. coil4

5、55 kc. control and switch C8 BE11992 20 Mfd. lytic x ISO w.v. T5 BE108157-I Output I.F. coil455 kc. R7 BE130257 5 megohm54 w. C9 BE11992 40 mfd. lytic x 150 w. v. T6 BE105128 Output transiormer R8 BE130240 30 ohm54 w. CIO BE10013 .05 x 400 v. T7 BEU4199 4 PM speaker R9 BE 130100 ISOM ohm54 w. ai BE1

6、2912 .00025 mica or RIO BE13011 250M ohm54 w. C12 BE10025 .002 x 600 v. T7 BE114259 4 Electrodynamic speaker Rll BE130166 ISO ohm54 w. as BE 1292 .0005 mica SI Switch on Volume control C14 BE10011 .01 x 400 v. LI BE105138 R.F. choke NOTE A* THE ANTENNA COIL ASSEMBLY IS MAOC SO THAT IT IS MOVABLE LEF

7、T OR RIGHT. WHEN MAKING THE ADJUSTMQiT AS GIVEN IN THE ALIGNMENT PROCEDURE MOVE THE COIL ASSEMBLY VERY SLOWLY. IT CAN BE MOVED BY HAND OR BY PIVOTING ONE EDGE OF THE BLADE OF A SCREWDRIVER IN THE HOLE AND ENCAGING THE BLADE IN THE GEAR TEETH OF THE COIL FORM. / Dial tuning / _ KNOB VIEW LOOKING AT B

8、OTTOM OF CHASSIS TO ADJUST COIL ASSEMBLY MOVE LEFT OR RIGHT COIL ASSEMBLY VIEW BOTTOM ViEW OP CHASSIS VOLTAGES MEASURED WITH A HIGH RESISTANCE VOLTMETER between SOCKET TERMINALS & e Aj CANNOT BE MEASURED WITH VOLTMETER. O a a *o 50L6GT I2SQ7 35Z5GT I2SK7 I2SA7 70 JMODEl 14BR-521A MODEL 14BR-S22A REAR OF CHASSIS VOLTAGE CHART 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