HV electrolytics and their associated components John.
Carl
KM1H
----- Original Message -----
From: "John G3UUT" <amps@grebe.plus.com>
To: <amps@contesting.com>
Sent: Tuesday, December 23, 2014 6:59 PM
Subject: Re: [Amps] Alpha 76 "SNAP" noise
Sorry folks, are we talking about the string of smoothing electrolytics or
a ceramic RF filter cap here? I'm curious about this as when I switched
my 2m amp on recently which hadn't been used for about a year there was a
regular series of 'snaps', the frequency of which gradually diminished as
it warmed up. I was worried by this but it didn't seem catastrophic and
seemed to be improving with time so I left the amp on. By the end of the
contest the amp was usable (typical) - I couldn't really use it earlier as
the snaps put quite a high level pulse of QRM into the RX path.
73 John G3UUT
On 23/12/2014 11:08, Andy Cook, G4PIQ wrote:
Oh yes. I heard this coming from one of our old Alpha 78s during CQWW CW
at 5U5Z some years ago. It did this for quite a few hours and then in the
middle of the night there was a big bang and the room filled with smoke
as one of the filter caps let go. It certainly woke the operators up. I
should change those caps now!
73
Andy, G4PIQ
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