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Astron power supplies...
On Sat, 17 May 2008, K4ERG wrote: "K4ERG" wrote in message .. . "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. Check for intermittent connections to your antenna. Most likely a bad shield connection inside one of the PL259 connectors or a bad ground connection. Stupid spell checker! Not my idea but it sounded good when I heard it: "Life's too short for spell checkers" Ham radio advertisement many years ago: "Life's too short for QRP" and it was for a big amplifier. ;-) |
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