Tuesday, July 12, 2011

New (old) lab power supply arrived

With my renewed interest in old-tyme radios, I have decided that I need to have a good adjustable lab bench power supply that will give me filament, B+ and C voltages appropriate for these old radios.

I have located a nice Heathkit supply that has 6.3 VAC at 4 amps for filaments, adjustable 0 - 400 VDC at 100 mA and 0 - negative 100 VDC.

For my SW-3 receiver, the filament voltage is too high, so I will have to build a voltage divider to bring that down to 2.5 volts.  Just tested it out and everything is working perfectly.

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