Montgomery-Ward-and-Co-05BR-1536A 电路原理图.pdf

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1、MANUAL OF 19SI MOST-OFTEN-NEEDED RADIO DIAGRAMS Montgomery Ward piwtpel;g2tt MODELS 05BR-1536A, 1537A /,-4r-, POINTER Models with 4= suffix MB” _ use 35Z5 in place of 35W4 I2AV6 (NOTE: TRIMMERS AOJUSTEO FROM BOTTOM) m 0 of i I2BE6 50C5 35W4 I2BA6 (SHIELOEO) rear view of dial assembly CHASSIS VIEW, S

2、HOWING TUBE LOCATIONS yD ALIGNMENT PROCEDURE AND RECEIVER STAGE SENSITIVITIES The signal source must be an accurately calibrated speaker voice coil and substituting a 3.2-ohm, 5- signal generator capable of supplying R. F. signals resistor across the secondary winding of the output t modulated 20% w

3、ith a 400-cycle audio signal. A 400- former. A reading of .4 volts AC across this res cycle source is necessary for the audio measurement. will be equivalent to a 50-milliwatt output with The table below lists the sensitivity at various points. All measurements are based on an output of 50-milli wat

4、ts. This may be measured by disconnecting the speaker voice coil and substituting a 3.2-ohm, 5-watt resistor across the secondary winding of the output trans former. A reading of .4 volts AC across this resistor will be equivalent to a 50-milliwatt output with the speaker connected. Variations of pl

5、us or minus 25% are usually permissable. Volume control at maximum for all adjustments. SIGNAL GENERATOR Frequency Coupling Capacitor 1400 Ice. 400 cycles Connection to Radio Pin No. 7 of 12BE6 Pin No. 7 of 12BE& See not* A External antenna clip 12AV6, Pin 1 Ground Connection TUNER SETTING ADJUST FO

6、R MAXIMUM OUTPUT Trimmers on output and input I.F. cans INPUT FOR S0-MILLIWATT OUTPUT 50 microvolts Note A: Lay output lead of generator in back of loop antenna. Turn up generator output. Loop antenna will pick up energy. (ON VOLUME CONTROL) p 047mt 8059 |2BA6 I2BE6 I2AV6 S 4 45 4J 43 VOLTAGE READINGS TAKEN WITH A IOOO-OHM-PER-VOLT 338HS V0LT 9CALC eETWECN po,NTS f READ OH THE 10 VOLT SCALE OF THE VOLTMETER. NOTE: Schematic Correction. C8 should be connected between Pin 7 of the 50C5 tube to 收音机爱 好者资料库 RadioFans.CN