You know when the lights dim , the transformer goes up in smoke and the
breaker blows....in that order. Collateral damage would likely be the
diodes.
You could replace them with C-D 381LX series 330uF at 450V as the larger
diameter fits right in the old plastic blocks. Replace the resistors with
100K 3W MOX. All at Mouser.
Carl
KM1H
----- Original Message -----
From: "Pete Smith N4ZR" <n4zr@contesting.com>
To: <Amps@contesting.com>
Sent: Wednesday, March 28, 2012 12:16 PM
Subject: [Amps] How Do You Know When Filter Caps Begin to Fail?
>I have an SB-220 that dates at least to 1978. There is no external sign
> of any problems, and the amp has been heavily used in contests for at
> least 20 years. It still delivers over 1300 watts on 80-20. Is there
> going to be any warning of a capacitor failure? Will there likely be
> any cascading damage to other components? Is it conventional wisdom that
> I should replace them as a precaution?
>
> --
> 73, Pete N4ZR
> The World Contest Station Database, updated daily at
> www.conteststations.com
> The Reverse Beacon Network at http://reversebeacon.net, blog at
> reversebeacon.blogspot.com,
> spots at telnet.reversebeacon.net, port 7000 and
> arcluster.reversebeacon.net, port 7000
>
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