Hallicrafters-Inc-5R51 电路原理图.pdf

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1、收音机爱 好者资料库 RadioFans.CN MANUAL OF 19S2 MOST-OFTEN-NEEDED RADIO DIAGRAMS hallicraf te rs 5R50 Continued from preceding 5R51&5R52 page, adjacent at left. AUDIO OUTPUT V4 50L66T OR (5005) : ci4 iopoo SW OSC./ TRIMMER Vb. SW ANT TRIMMER Fig. 5. Top View of Chassis Showing Location of Tubes and Alignment

2、 Adjustments BC OSC trimmer tLC|3C n*6DMFD CAST RESISTOR SYMSOL * RI7 LAST CAPACITOR SYM80L - CEO Main circuit at left. Fig. 6. Front View of Chassis Showing Location of Alignment Adjustments Intermediate Frequency. 455 KC Antenna.Single wire or doublet Power Supply . . 105-125 volts 60 cycles AC on

3、ly Frequency Coverage.540-1620 KC and 6-18 MC ALIGNMENT PROCEDURE Connect output meter across speaker voice coil. Set volume control at maximum. Use a non-metatlic alignment tool. Signal generator must have a modulated output and cover 455 KC, 600 KC, 1300 KC and 14 MC. Keep the generator output as

4、low as possible to avoid AVC action. Refer to Figs. 5 and 6 for location of alignment adjustments. 200MMF 20JJH 400 40OA MMF Fig. 7. RTMA Dummy Antenna SIGNAL GENERATOR CONNECTIONS High side to stator plates of rear sec tion of tuning capacitor through a .01 mfd. capacitor. Low side to chassis. High

5、 side to A1 on antenna terminal strip on rear of chassis through a standard RTMA dummy antenna (Fig.7). Low side to chassis. Connect the jumper between A2 and G. Same as STEP 2. Same as STEP 2. SIGNAL BAND GENERATOR SWITCH FREQUENCY SETTING 455 KC BROADCAST 1000 KC 14 MC SHORTWAVE 14 MC ADJUST FOR MAXIMUM OUTPUT 1300 KC BROADCAST 1300 KC 600 KC Broadcast I 600 kc 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN