January 17th 19, 06:41 PM
posted to rec.radio.amateur.homebrew
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First recorded activity by RadioBanter: Jan 2019
Posts: 2
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Astron RS-12A Repair Help
On Saturday, January 18, 2003 at 12:10:59 AM UTC-8, Roger Leone wrote:
Woods:
Power supplies like yours are pretty easy to repair, but the best way is not
to randomly replace parts. There are many possible problems and you need to
approach the troubleshooting in an organized way, eliminating what is
working and moving on to what isn't. You will need a volt/ohmmeter for this
work.
Here is a link to a schematic that works:
http://www.repeater-builder.com/rbtip/rs12a.html
As a previous poster suggested, check to see if you have AC coming out of
the transformer. If you don't, check the fuse and switch on the primary
side. If they are good and you still have no AC out of the transformer, and
all the wiring seems OK and you have 117 volts AC going in the primary, then
the transformer may have an open secondary winding. This is unlikely, but
you should check to be sure. If the transformer is bad, you need to decide
how badly you want to repair the supply, as that is the most expensive part.
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