[AMRadio] small power transformer needed


Jim Tonne Tonne at Comcast.net
Mon Jul 14 15:24:15 EDT 2014




Use a split-primary transformer.   Connect one of those primaries
to 120 VAC and the filament winding to the tube.

Use the other primary with a voltage doubler to develop the
negative voltage.

- JimT  W4ENE


On 7/14/2014 2:42 PM, John King via AMRadio wrote:
> I need a physically small power transformer to build a small bias supply



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