"Sal M. Onella" wrote in
:

I mistakenly put a 2m antenna on my dual band HT and tried to use it
for a short QSO on a nearby 440 repeater. The other ham said I was
barely making the repeater, while my poor HT got so hot that I could
barely hold it after a minute's use.

The antenna was wrong and the heat was real -- whatever the theory
behind it.

Let the anecodotes flow...

Your FM HT is a classic case than can be adequately represented by a steady
state analysis. Your HT was operating into a load that increased its
dissipation, but there would be almost certainly be other mismatched loads
that would decrease its dissipation... but you wouldn't notice the event,
you would likely only remember the times the HT was too hot to handle.

I await the inevitable photon explanation.

Owen