Old Transformer Replacement

Two of part # 7846 TR from MPJA in parallel. It's a 24V 10A transformer, at $17.95 each.

Ed

Grab the xfmr out of a an old junk microwave, 500w or better should serve. Cut-out/remove high voltage winding and knock out the "current shunts (core material "shims" wedged in the windings windows.)

Rewind with wire capable of handling the current you wish, with the proper number of turns to deliver the voltage you desire (this can easily be determined by winding any number of test turns (10 or more to get some accuracy), measure voltage and divide by number of turns to give you a volts/per-turn ratio.

Cost (if xfmr is gotten from a dump) $0.00 USD! :-)

Regards, JS

Thanks guys, I appreciate the help.

Steve

No problem. However, if I might inquire, did you go the hard route of building your own, or find a place to buy one?

Warm regards, JS

We will probably buy one. This is meant for relatively long periods of use, and in my experience rewound mot's run hot and usually need fan cooling. We will probably just order two of the xfmr's the previous poster recommended, that is, if the cust decides it's worth it to them.

Thanks again, Steve

I understand.

Was just hoping good old "American Ingenuity" had come into play. :-)

Regards, JS

I've actually rewound microwave transformers before, they're quite handy. I use one for a high voltage power supply using the schematic Sam has at

Thanks, Steve

Bad idea John,

2) Even if you can unwind, you are still facing with dangerous chance, there are many turns, to unwind without know the actual number of turns would destroy the motor (through wrong voltage/power).

Never do that, and Never recommend to any one.

Regards,

Jack.

John :-#)#