This is slightly off the original question, but what is better for this sor=
t
of application, a MOSFET, or a bipolar transistor. Since as mentioned, FET'=
s
are designed more for fast switching and often to stay out of the linear
area, would a big transistor be a better choice since they were probably
designed to be in the linear region of operation? I have a bag full of TO-3
cased units from old linear power supplies for instance. Would they be
better?

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