[Elecraft] Anyone know this info about switching supplies?

[Brett Gazdzinski]

We use nothing but switching supplies in my industry, and I have NEVER
had one fail and take out what it powers.
Talking about 10,000 or so supplies.

I dont know much about the ham type stuff, except to stay away from anything
made by mfj...

Brett
N2DTS

----- Original Message ----- 
From: "Tom Hammond" <n0ss at embarqmail.com>
To: <elecraft at mailman.qth.net>
Sent: Tuesday, November 06, 2007 10:35 AM
Subject: [Elecraft] Anyone know this info about switching supplies?


> Folks:
>
> A local discussion has 'erupted' regarding switching poser supplies and
whether
> they can fail in an UNregulated (e.g. high) output voltage condition, or
if
> when they fail will they (almost) always fail in a NO OUTPUT mode?
>
> I think this discussion may have been started as a result of a subject
here on
> the reflector about overvoltage protection (OVP), but it's managed to take
on
> a life of its own with respect to the MODES in which a switching P/S
> can/will fail.
>
> Anyone have enough real experience to express their thoughts on this
subject.
>
> Must admit... I have no clue myself.  I've 'heard' that most switchers
fail in
> the NO OUTPUT mode, but this is strictly hearsay.
>
> Let's try to get several responses and the let the subject drop before IT
takes
> on a life of its own on the reflector and Eric has to step in... he's
> busy enough
> right now. <G>
>
> 73,
>
> Tom   N0SS
>
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