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From: "Harry Dellamano"
Subject: Re: Strange failure mode in switchmode power supplies: Followup
Date: Fri, 20 Sep 2002 11:12:21 -0700
Organization: Posted via Supernews, http://www.supernews.com
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"Brill Pappin" wrote in message
> Could it be a temporary surge or oscillation in the line, one that might
> show up during the "short" period you where testing the line with the
> various methods?
> It might combine with some other factor and blow the hardware.
> It might be worth building some sort of continues monitor, something with
> alarm maybe.
> - Brill Pappin
Sounds good! Get a isolation transformer and monitor it's output with a
digital storage scope. Set the trigger to single sweep and the trig level to
the equivalent of 135VAC. It will only trig at levels >135VAC. Keep all
data. If it is not amplitude dependant then get creative with the trig and
only trig at higher than 60 Hz.
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