Go to http://groups.google.com and do an advanced search for "microwave
oven transformer" in rec.radio.amateur.*. You'll get a couple of pages
of hits, representing at least a couple of hundred postings on the
topic, many of them from this newsgroup.

Roy Lewallen, W7EL

AndyS wrote:
Andy writes:

I have been thinking about building a high voltage power supply
for a big amp, and am toying with the idea of using a couple of
microwave oven transformers, which I have on hand.

I plan to use two, with the primaries connected in parallel but
opposing, so that each one will supply voltage, half-wave, to a
diode ring. By doing this, I can have each core grounded like it
is used in the ovens....

So, has anyone else done this and run into any problems that
I may not have forseen ?

Thanks,
Andy