Do electolytics have a particular failure mode when they go bad over time?
I assume that the dialectic is drying out and they just gradually loose
capacity - lower uF's.
Does the voltage rating decrease?
Do they begin to look resistive?
How does the degradation of an electrolytic that is in daily use compare
with one that has been sitting unenergized for several years?
Rick, WD8JJA
----- Original Message -----
From: "Peter Chadwick" <Peter.Chadwick@zarlink.com>
To: <w4nul@brightok.net>; "AMPS" <amps@contesting.com>; "'Richard'"
<2@mail.vcnet.com>
Sent: Thursday, March 21, 2002 10:31 AM
Subject: RE: [Amps] Henry 2KD Classic
Rich said;
>However, if you see white deposits around any of the pressure
>vents, the electrolytics are history.
I'd add to that that if you hear a ticking noise from the caps, they're
history,
too - and in both cases, not very good history! Sometimes they tick as they
break down inside.
Where are the resistors physically located? There are advantages in terms of
a
bleeder to using 20k, but as Rich says, they get hot, so need to be well
away
from the capacitors.
73
Peter G3RZP
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