"xpyttl" wrote in message
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Astron linear supplies use a 3 terminal regulator, usually an LM317.
These things do tend to fail from time to time. Can't tell if that's your
problem, but it is likely, and the things are cheap enough it's worth
popping a new one in to find out.


Really? What model of Astron linear power supply have you repaired or seen
that uses this design approach? I have never seen one like this -- over
past 20 years.
Confusing this with some other mfg. design?

Astron has been using the 14-pin (30 years old) LM 723 regulator IC with NPN
pass transistors (e.g. 2N3055, 2N3771) ... for as long as I have been
repairing them.

Check here for correct Astron information - repairs, etc.
http://www.kbt-dc-supplies.com/index.php

and Astron schematics (which show the LM723, not the later LM317 design)
http://www.repeater-builder.com/astr...ron-index.html

gb