"James Sweet" wrote in
news:MKLtd.650$Qp.314@trnddc01:




The vast majority of microwaves cycle the magnetron, only the inverter
type can do true variable power. I don't know if only Panasonic does
this, but one way to tell would be the weight, a conventional
transformer power supply will be considerably heavier, and the ovens
will be cheaper as well.



Price-wise that's strange,as it's cheaper to make a switcher than it is to
make a big,iron-core transformer. That's why most electronics went to
switchers;it's cheaper than 50/60hz iron transformers,especailly at higher
power levels.

--
Jim Yanik
jyanik-at-kua.net