Newer electrolytic capacitors are considerably smaller in physical size and
are, generally, of considerably better quality than the older capacitors.
Going to 105-degree capacitors than the original 85-degree capacitors does
give an improved margin of safety. The tolerances of "modern" capacitors are
also generally considerably better than the originals.
Glen, K9STH
Website: http://k9sth.com
________________________________
From: rick darwicki <n6pe@yahoo.com>
To: AMPS <amps@contesting.com>
Sent: Thursday, January 3, 2013 9:39 PM
Subject: [Amps] PS filter caps
I have an old HT-41 apart, it has the original filter caps. I brought it up
slow and got the filter caps to level out and they appear OK. I took them (6)
out individually and charged and discharged them on a regulated 450 v supply
and I'm seeing between 1 and 4 ma leakage but it seems to be going down the
more they are under power. They have 20K equalizing resistors across them.
The original caps are about 4" x 1" and rated 100 ufd / 450 v / 85 degree
The guy I'm working on it for gave me some new caps that are 1-3/8" x 3/4" 105
degree 100 ufd 450 v.
Any opinions on if the smaller caps can handle replacing the old ones or should
we look for bigger cans?
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