General-Electric-Co-H400 电路原理图.pdf

MANUAL OF 1940 MOST POPULAR SERVICE DIAGRAMS General Electric MODEL H-400 GENERAL INFORMATION Model H-400 is a compact four-tube AC DC tuned radio frequency receiver that tunes the standard broadcast band of frequencies and one police band. One side of the power line is connected directly to the chassis ground; therefore, caution should be exercised in servicing. When operating from a DC source of power it is necessary to insert the power plug with the proper polarity. If the receiver fails to function with the power plug inserted one way, reverse the plug. If any hum is. noticed when the receiver is used on A-C, reverse the power plug as above. ALIGNMENT Connect the high side of the signal generator through a 100-mmf condenser to the terminal to which the antenna hank is soldered. The low side of the signal generator output should be connected to the receiver chassis through a .05 mfd. con denser. Connect a suitable output meter across the voice coil leads; then proceed as follows 1. With gang condenser plates completely closed, the tuning index should be over the last calibration mark on the dial. 2. Set volume control to about % of maximum. 3. Rotate gang to minimum capacity and tune trimmers on the gang condenser to 1750 KC signal Re-tune gang to 1500 KC signal and peak trimmers by alternate adjust ment. I2F5GT 50L6GT | SPEAKER Symbol Description Symbol Description C-l Tuning Condenser L-l Antenna Coil C-2 L-2 R F. Coil C-3 001 mfd., 600 V. Paper PI Pilot Lamp. Mazda No. 47 C-4 005 mfd., 600 V. Paper R 1 30,000 ohm. Volume Control (300 ohm C-5 .01 mfd 600 V. Paper R-2 stop) C-6 R-3 75 ohm. 2-W. Carbon C-7 R 4 4,7 megohm. 34W Carbon C-8 .02 mfd 600 V. Paper R-5 1.0 megohm. 34-W Carbon C-9 20 mfd., 150 V. Dry Electrolytic R-6 1.0 megohm. M-W. Carbon C-10 40 mfd-. 150 V. Dry Electrolytic R-7 150 ohm. 34-W. Carbon =*= 5% 4700 ohm. 34- W. Carbon 1 35Z5GT 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