On Fri, 16 May 2008, Tio Pedro wrote:

Unless there are other major failures, the crowbar simply
puts the Astron supply into current limiting. I've had
50-amp supplies running in current limiting for days
because of noise-induced SCR firing.

If the supply crowbars because a pass transistor shorted,
then the crowbar location becomes a rather mute matter;
and involves a bit more than fuse changing.

Pete




Well, I've had a number of occurrences where, PTT on 2 M FM rig at current
well below current ratings and the output voltage goes to 0.5 or less and
had to off-on cycle the main switch. Makes me mad. Gotta get back to that
deep cycle 12 v battery.... They always go bad very very very slowly.
Great when there is a power failure, too! ;-)

Thanks to the rest of you guys that made comments, too.