Right RL, I thought about that back at the beginning. There are two issues with a remote pass element. One, as you say I've got to get rid of the heat. ~15W or so. Two, The gain of the loop is no longer linear in power.
George H.
Is power is what you want to control, or is it temperature?
RL
Is that a trick question? :^) Of course I want to control the temperature. (I made this 'silly' sqrt(V) circuit, but now don't need to use it.)
GH
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