"James Thompson" wrote in message
...

"James Thompson" wrote in message
...
Has anyone re-wound a power transformer with good results?
I have salvaged some big transformers from microwave ovens, and cut the
secondary winding out of it. Then re-wound it with 14 guage till getting
enough turns to produce about 20 volts. Problem is the thing gets hot
even without a load on it.
Is there something I am overlooking? Thanks.


Thanks for all that great info. I will hunt down the links you posted. I
am
currently running a fan just to cool the transformer, but now I'm back to
the drawing board. Have a great day. Jim


See if your drawing board has room for several extra turns
on the primary winding.
Mike