Galvin-Mfg-Co（Motorola）-65T21 电路原理图.pdf

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1、收音机爱 好者资料库 RadioFans.CN MANUAL OF 1947 MOST-OFTEN-NEEDED RADIO DIAGRAMS ALIGNMENT AND SENSITIVITY CHART Connect output meter across speaker voice coil (.38V = .05 watts) Volume control s e t at maximum for all operations. OPERATION IN ORDER gang CAPACITOR SET AT band SWITCH SET AT DUMMY ANTENNA GENE

2、RATOR connected TO ADJUST TRIMMER OR IRON CORE generator SET AT (400P* 30% modulated) AVERAGE INPUT FOR .38V OUTPUT . Adjust I.F for maximum s Minimum B.C. . 1 mf Osc. - Mod. grid 1-2-3-4 5 B. C. Osc. trlnmer 0-1 455 Kc 1620 Kc 900 microvolts to I.F. grid 4.5 microvolts to Osc.-Mod- grid (455 Kc) !.

3、 Set B.C. Oscillator trlnmer 1620 Kc B.C. None Radiation loop* 1. Adjust B.C. loop trlnmer for maxlmimi 1400 Kc B.C. None Radiation loop* 6 B.C. loop 1400 Kc trlnmer C-4 (on loop) should be adjusted with 6.5 microvolts to Osc.-Jtod. grid through . 1 mf dunny 4. Set S.W. Oscillator trlnmer 12. 2 Me S

4、.W. BO itrif. Antenna terminal 7 S.W. Osc. trimmer C-2 12.2 Me S.W. 50 mnf. 5. Adjust S.W. 11.5 Me 6. Repeat above steps for maximum accuracy Antenna terminal 8 S.W. Antenna 11*5 Me trlnmer C-6 Connoct signal generator to a 5” dla, 3 turn loop# Distance between loops always over 12”, Adjust dis tanc

5、e ariii generator output to maintain output of 50 milliwatts (,387 on output meter). 6 microvolts to Antema terminal .045 volt to 1st A.F. grid (4001 cycle audio) 107 收音机爱 好者资料库 RadioFans.CN MANUAL OF 1947 MOST-OFTEN-NEEDED RADIO DIAGRAMS Galvin Manufacturing Corporation Motorola Models 65T21 and 65T21B _Chassis HS-32 & HS-67 Circuit diagram on previous page. 收音机爱 好者资料库 RadioFans.CN