> BTW, a 1N5408 on top of an output transistor makes a fair
> temperature
> regulator. Not perfect but its cheap and simple as a
> retrofit of an existing
> brick.
Measure the voltage regulation of that method when you drive
the amp with rated drive power and most people's opinion
will change. It's a crummy system at more than a few watts.
As the base is driven with RF it tries to move negative. In
order for the bias to remain anywhere near to stable the
current through the diode has to be at least ten times the
peak base current. You'll fry that little 1N5408 trying to
get that much current in any amp that runs more than a few
mA of base current.
73 Tom
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