"NSM" wrote in news:XpNtd.5335$Ya4.1531@edtnps84:


"Repeating Rifle" wrote in message
...
| in article , wave at wave@waving wrote on
| 12/8/04
2:38

| I was intrigued by this and other posts on the subject. Here is what
| I conclude off the top of my head. I may be wrong in part. It sure is
| difficult to glean specific information from the Panasonic web pages.
...
| Running transformers at high frequencies, what the inverter does,
| reduces the size and weight required to handle large powers. The cost
| of
electronic
| devices such as transistors has dropped as manufacturing techniques
| improved. Magnetic components such as transformers have not dropped
| much,
if
| any, in price. To a large extent, cost and size for these components
| vary together.

Mine has a big ass inverter transformer wound with what looks like
1/4" thick Litz wire (multiple strands to prevent surface effects).

N



"inverters" take rectified and filtered line AC(DC) and chop it at high
frequencies (multiple KHz,maybe 25-50 KHz) thru a non-iron(ferrite) core
transformer,then rectify and use for the magnetron supply.This requires a
inverter control PCB.

Ordinary iron core,low freq transformers run on 50/60 hz line AC.and weigh
a lot more than an inverter transformer.

--
Jim Yanik
jyanik-at-kua.net