>"BeeCee" writes:
>
>>
>> How important is a turn table?
>
>I know this probably won't help you but is an interesting observation
>nonetheless.
>
>In 2002 I had occasion to acquire 2 new microwaves.
>
>One, a Samsung, came with a new travel trailer and the other I had to buy to
>replace the one in my kitchen that crapped out.
>Turned out only one microwave, a specific GE model, would fit the kitchen
>space where the old one came out - unless I bought one of the little dinky
>reheater types.
>
>So as it turns out......the Samsung has a turntable but has a definite
>hotspot; the GE does not have a turntable and has no noticeable hotspot(s).
>I don't know much about the mechanics of microwave ovens but I suspect the
>GE may have a device that that rotates the wave generator ??

Yep.

The device that produces microwaves is called a "magnetron". GE microwave
ovens do not incorporate a turntable because their system uses a magnetron with
a rotating magnetic field, very similar to how modern x-ray tubes operate for
achieving a homogeneous beam. I believe GE refers to their method as a
"stirrer", at least they used to. I much prefer GE microwave ovens, the
turntables interfere with the size/configuration of cookware that can be used
and of course contain *dead space*. I can use a glass rectangular caserole
that just barely fits into my GE microwave oven cavity and it cooks perfectly
evenly throughout, right into the very corners... no hot spots, no cold
spots... and no turntable mechanism to bust, and my GE is 25 years old. When
it finally goes, and it doesn't seem to be any time soon, I will get another
GE.

M-W

mag·ne·tron

noun
Etymology: blend of magnet and -tron
Date: 1924
: a diode vacuum tube in which the flow of electrons is controlled by an
externally applied magnetic field to generate power at microwave frequencies
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