General-Electric-Co-111 电路原理图.pdf

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1、MANUAL OF 1947 MOST-OFTEN-NEEDED RADIO DIAGRAMS CONVERTER LFAMPLL DET 8 AUDIO POWER OUTPUT I2SA7 I2SK7 I2S07 50L66T ELECTRICAL CIRCUIT ALIGNMENT AUGNMBNr FRBQUeNCieS: R-F. 1500 kilocycles I-F.455 kilocycles BQUIPMBNT RBQUIBBD: 1. Line isolation transformer. 2. A-c output meter, 1 Y2 volts full scale

2、. 3. Test oscillator with tone modulation. 4. 0.05 mf. paper capacitor. 5. 50 mmf. mica capacitor. 6. Insulated screwdriver. 2. Connect the line cord to the line through an isolation 1:1 ratio transformer. i. Connect output meter across loudspeaker voice coil terminals. 4. Keep radio volume control

3、at maximum and attenuate the test oscillator signal output so that the output meter reading never exceeds 1 volt. 5. For R-F alignment, the Beam-a-scope assembly should be connected and dressed in exactly the same location it would occupy if installed in the cabinet. 6. Connect the capacitor as list

4、ed in column 2, between the output “high side” of the test oscillator and the point of input specified. PROCBDWBGBNBRAL* 1. Remove chassis from cabinet. Turn pointer as far counterclockwise as possible. The pointer should set horizontal. If it doesnt, remove the dial window and slip the pointer on i

5、ts shaft until it is horizontal. ALIGNMENT CHART Step Connect Test Oscillator to Test Oscillator Setting Pointer Setting : on Radio Adjustment for Maximum Output 1 12SG7 grid in series with 0.05 mf. cap. 455 kc 1500 kc 2nd I-F trans. trimmers 2 12SA7 grid in series with 0.05 mf. cap. 455 kc 1500 kc 1st and 2nd I-F trans. trimmers 3 Ant. post in series with 50 mmf. 1500 kc 1500 kc C4 (08C.) 4 : Ant. post in series with 50 mmf. 1500 kc 1500 kc C3 (R-F) I2SK7 12SQ7 50L6GT 1 TURNS- BOTTOM VIEW OF CHASSIS 35Z5GT 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