Okay, I thought that perhaps the heating element wasn't working, so I
pulled the oven apart.
In fact, the internal unit was warm and it got hot when I ran it for a
couple minutes w/o the foam around it. All of the solder connections
which I can see look good. I am not sure I want to try to remove the
internal PC board.
There are two adjustments visible once it is apart. One is a trimpot
and the one that you can normally adjust with the case closed appears to
be a piston type capacitor. It actually appears to be better
constructed than I thought.
I'll take a few pictures tomorrow for those who asked.
Fred
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