bill ramsay wrote:
dear all
I am playing with some 813's at the moment. I am trying to get the
heater supply sorted out.
the 813 needs 10v at 5 amps, the do glow v. bright when lit up.
pretty neat.
I would buy two 5v switching supplies and wire them in series. Both of
these surplus should cost less than the heatsink for a TO-3 transistor.
Adam
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