"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


Dave Cushman, G8MZY
http://www.dave-cushman.net/elect/transformers.html

ESP
http://sound.westhost.com/xfmr2.htm

DIY Output transformer (audio)
http://www.audiohobbyist.com/projects/diyopt.htm