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Andy N1ORK · 07-02-2010, 07:22 PM

The filaments in the tubes were wired in series so you wouldn't need a transformer for the power supply and the plate voltages could all run on 115vdc. Usually 1/2 wave rectification and cap filtering. You just had to be careful that the polarity of the AC plug was correct if you were going to work on it. The radio, however, worked either way. Not sure of the tube compliment, but I think one was a 12at... something.

07-02-2010, 07:22 PM	#10
Andy N1ORK Senior Member Join Date: Jan 2008 Location: Manchester, CT Posts: 1,034	The filaments in the tubes were wired in series so you wouldn't need a transformer for the power supply and the plate voltages could all run on 115vdc. Usually 1/2 wave rectification and cap filtering. You just had to be careful that the polarity of the AC plug was correct if you were going to work on it. The radio, however, worked either way. Not sure of the tube compliment, but I think one was a 12at... something. __________________ CQ..CQ..CQ..DE ANDY, N1ORK..QTH Manchester, CT...QRZ..QRZ.. Hello anyone out there? Is this thing on? SkyWarn, CERT, EmComm