That pretty much confirms my thinking. If the supply is blowing fuses,
something is actually wrong. The crowbar shouldn't cause it to happen.
Chuck
WB2EDV
----- Original Message -----
From: william...@aol.com
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, December 25, 2008 11:41 PM
Subject: Re: [Repeater-Builder] Re: Astron P/S question
I have an Astron RM-35M (35Amp) that I just tested by shorting the output and
it doesn't blow the fuse. I think I would be looking for something in the
primary circuit that might be shorting like the transformer primary or the
surge arrestor or maybe the wiring. I have seen transformers that short after
they warm up a little.
Bill - WA0CBW
In a message dated 12/25/2008 10:11:11 P.M. Central Standard Time,
lar...@hotmail.com writes:
--- In Repeater-Builder@yahoogroups.com, "Chuck Kelsey" <wb2...@...>
wrote:
>
> I have an old Bullet power supply built from a kit (anyone remember
those?)
> that uses the 723. You can short the output time and time again and it
> simply folds back.
heheheh I have one of those still in service on a repeater. Re-capped
it a year ago and it still works fine. As I recall a shorted output
simply folds back, like you say.
I also have two Astrons here on the bench. One is a VS12, the other
is a RS12. When the output is directly shorted with heavy wire they
both simply fold back. Shorted them dozens of times; never a blown fuse.
Laryn K8TVZ
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