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Astron power supplies...
On Sat, 17 May 2008, K4ERG wrote: "A" wrote in message x.com... 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. You have stray RF in the shack. Not likely if you've been running the gear for years and didn't touch anything. see my response to your second post. Check for intermittent connections to your antenna. Most likely a bad shield connection inside one of the PL259 commuters or a bad ground connection. |
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