Date: Fri, 09 Apr 2010 18:48:24 -0700
From: "Carl Clawson" <carlclawson@verizon.net>
Subject: Re: [Amps] HV lytic max V ratings..some notes.
To: <amps@contesting.com>
Message-ID: <48E2F8DF63F144F89CCE0A499C5CE384@Thumbelina>
Content-Type: text/plain; charset=US-ASCII
> Somebody was asking abt how high you can safely operate a typ
> 450 v lytic.
... don't run em over
> 75% of their V ratings.
>
> That's 75% of the working vdc..
So, anyone know the technical definition of "working voltage" if it isn't
the, um, voltage the capacitor can work at? Don't you just love
specsmanship?
## IOW... the stamped WV...and not the.. 'surge voltage'. A lot of
folks seem to think you can run a cap continuously at it's surge vdc
rating... you can't.
Incidentally, I understand some electrolytics can be reformed to a higher
working voltage if you apply a gradually increasing bias to them and then
hold them for a while somewhat above the desired WV.
## I heard this one too. The caveat is... apparently, the Capacitance
will drop to a lower value. So it's usually only done.. if really required.
Jim VE7RF
73, Carl WS7L
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