To: | <amps@contesting.com> |
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Subject: | Re: [Amps] Solid state relays..again |
From: | "John K Gotwals" <john@gotwals.com> |
Date: | Tue, 11 Feb 2014 14:34:33 -0500 |
List-post: | <amps@contesting.com">mailto:amps@contesting.com> |
Sounds like my old 50A Astron. Big transformer and rectifiers. Pass transistors for a regulator. Once in a while that thing turns on with a WHummpppp and a low frequency ringing that just trails off. My guess is the noise has to do with the hysteresis loop of the transformer core and where on the loop the power supply was at turn-off and the following turn-on. John, N9JG (john@gotwals.com) _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps |
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