16 Jun
2024
16 Jun
'24
8:34 p.m.
Yes, those Rifa, Wima, and so on, mains-bypass paper caps in clear epoxy always fail,
they're notorious. Over time the epoxy cracks letting in moisture which degrades the
paper. They may be rated to fail without bursting into flames, but they sure make some
smoke.
Replace on sight, with an appropriate X/Y-rated part.
-Dave Wise
________________________________
From: Chuck Guzis via cctalk <cctalk(a)classiccmp.org>
Sent: Sunday, June 16, 2024 7:58 PM
To: cctalk(a)classiccmp.org <cctalk(a)classiccmp.org>
Cc: Chuck Guzis <cclist(a)sydex.com>
Subject: [cctalk] Re: The magic smoke....
On 6/16/24 19:42, Dave Dunfield via cctalk wrote:
Chuck Guzis wrote:
Point taken, but in this case no amount of "reforming" will fix those
old 'Rifa" filter caps.
--Chuck
Probably due to the failed film-in-oil (sometimes
known as Rifa) line
filter capacitors--a very common failure and nonfatal.
I never "just turn on" equipment that's been out of service for an
extended
period of time ... until I ...