On Dec 29, 12:58*am, "Tio Pedro" wrote:
Hey Jimmie! *My Panasonic inverter microwave croaked. *I got
a chance to replace the power supply! *The transformer looks
just like a fancy TV flyback, and the entire board weighs
about 8 ounces. *The supplies are about 50 bucks new. Panasonic
vented the ovens through the top, and the moist air flows around
the electronics on the side, causing many early failure modes.
Figured you'd be interested.

Pete

Thanks Pete, I order one a couple of months ago to play with and found
another at the thrift store the other day. I havent had much of a
chance lately. I worked on main frame computer systems for over 20
years and now they put in a new system that is all PCs. You just
replace the box when it breaks. I have been going to school on that so
much lately I havent gotten back to my project. I do think that there
is a place for HVSPs in amateur radio, maybe not microwave oven
inverters but someone is going to come up with a good pwer supply at a
reasonable price. I invision a device that would mount in place of an
existing transformer and maybe sell for half the price of the
replacement transformer. Lately my thoughts have gone more towards
ways of modifying UPSs. The UPSs operate in a PWM switch mode to
convert high frequency chopped signal to 60hz. I figure if you could
modify the PWM data that is being used you could drive a step up
transformer for HV. One problem I have is finding data on how these
operate. It seems no one publishes a schematic.


Jimmie