Re: New "MOT" power supplies??

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Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net> 


Subject: RE: New "MOT" power supplies??
 > Original poster: "Daniel Barrett" <dbarrett1-at-austin.rr-dot-com>
 > -----Original Message-----
 > Original poster: Ed Phillips <evp-at-pacbell-dot-net>
 >
 >  > I can't imagine those things being useful for TC work, at least not for
 >  > primary capacitor charging.  Maybe the rectified output would be OK for
 >  > a DC coil.  I suspect also that the line isolation isn't good enough to
 >  > allow stacking those things in series.
 >  > Ed

 > I dunno. From the pictures, it looks like the transformer has so few turns
 > as to be easy to rewind for 2X or 4X the original voltage. At that point
you
 > have an EXCELLENT supply for a DC coil. Plus, a little back engineering
may
 > show an easy way to increase the power. Add a little oil bath for the
whole
 > thing...

I suspect that if we (collectively) put half as much time into fiddling with
these new inverter supplies as we've spent cooking NSTs over barbecue
grills, chiseling off asphalt potting, disabling GFCI circuits, and the
like, we'll find that they will revolutionize the medium power coiling
activity.

I don't see them replacing 10kVA pole pigs any time soon, but their DC
output implies easy combining, so getting a few kW by combining the outputs
of several (plugged into receptacles on different breakers) starts to make
medium power (1-5 kVA) DC coiling look more attractive.

As long as new NSTs are comparable in price to new Microwave ovens, I don't
see the inverter oven supplies replacing NSTs.. Building that first coil
based on a NST is such an easy step.