[Top] [All Lists]

Re: [Amps] Alpha 76 "SNAP" noise

To: AMPS <>
Subject: Re: [Amps] Alpha 76 "SNAP" noise
From: Alek Petkovic <>
Date: Wed, 24 Dec 2014 10:10:06 +0800
List-post: <">>

Yep. They were talking about the electrolytics.

Change 'em, before you have to change your underwear.

73, Alek.

On 24/12/2014 7:59 AM, John G3UUT wrote:
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!


Andy, G4PIQ
Amps mailing list

Amps mailing list


Family Businesses:
SP Electrical.
Hampers by Hand.

This email has been checked for viruses by Avast antivirus software.

Amps mailing list

<Prev in Thread] Current Thread [Next in Thread>