-----Original Message-----
From: Phil (VA3UX) <phil@vaxxine.com>
Cc: amps@contesting.com <amps@contesting.com>; K4SO@aol.com <K4SO@aol.com>
To: <amps@contesting.com>
Date: 04 October 2001 01:26
Subject: Re: [AMPS] Noises in electrolytic capacitors
>
>> These were all new parts when built Tom. Ohmite Brown Devils are
>> still made. They're hollow core, wire-wound, glazed enamel.
>> Physically, nice well made looking resistors. But that didn't seem to
>> prevent the phenomenon of wire wounds opening-up for no apparent
>> reason.
I've seen numerous failures of products in the cell and paging base station
industry from repeated expansion/contraction movement in component leads and
coax inners. WW resistors have a degree of physical movement available in
the wire. It's unlikely that a ham amp PSU goes through enough hot/cold
cycles to cause failure that way, but it might contribute.
Steve
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