AndyS wrote:
On Apr 18, 9:22 pm, JIMMIE wrote:
I have an HF amp that uses a single 811A in grounded grid. The power
transformer smoked. The transformer was from an old TV set I think it
was rated at 540VAC on the sec and I ran it into a voltage doubler for
about 1300 VDC . Any info on something I could use as a replacement
would be appreciated.

Jimmie

Andy comments:

You might investigate using a high voltage transformer from an old
microwave oven...... If the secondary voltage turns out to be too
great,
their construction makes it fairly easy to remove some turns...

I haven't tried this, .... just something to consider..

Andy W4OAH


Hmmm....come to think of it - they tend to go to 1000V AC secondaries -
but there is plenty of stray magnetic circuit usually provided which
might need knocking out of the core...

Brian W