"Jim Yanik" . wrote in message
.. .
"NSM" wrote in news:154ud.36928$6f6.29966@edtnps89:


"Jim Yanik" . wrote in message
.. .
| "NSM" wrote in news:XpNtd.5335$Ya4.1531@edtnps84:
...
| Mine has a big ass inverter transformer wound with what looks like
| 1/4" thick Litz wire (multiple strands to prevent surface effects).

| "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.

Yes? What's your point? This Panasonic has the biggest ferrite
inverter core I've seen.

N





I didn't know you had a Panasonic.(with inverter tech)

But for 1 KW power levels,of course you will have a large transformer.
Think how big (and heavy) a 1 KW+ iron-core xfmr would be.



They're quite big and heavy, at least in the old ovens. Still not as big or
heavy as a 1KW metal halide ballast, and even those are much smaller and
lighter than 1960's vintage 1kw ballasts, those were absolute monsters.