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ANTENTOP- 01- 2010, # 012

Practical Photos for P.A. on Tube GU-43B



Photo # 7


Photo # 7. Here is shown Electric Power Part of the PA. PCB plate with rectifiers bridges for 2500- V, 300- V, 30- V and 100- V is attached at the main transformer. At the right lower corner you can see antenna- switching PCB. Two green terminals are intended for fan.


Photo # 8. Take attention to the gang switch. It is insulated from the metal case. It is stay on a textolite plate. Screw that came through front panel are in Teflon insulation. Plate variable capacitor is an old military capacitor from Russian transmitter RSB. Black wire at the lower right corner is coaxial cable for input RF. At the tube place its braid is not grounded. Coaxial cable braid is grounded only at switching relay.

Photo # 8

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February 13, 2018 22:52

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