[Amps] Buzzing transformer

[David G4FTC]

Hi Carol,


If the transformer is getting hot, and I mean so hot that it cannot be touched, then it could be a shorted turn on one of the windings - bad news as it means the transformer is effectively u/s.


If the transformer runs at its normal temperature, then it is probably just a loose lamination - not usually a problem, just annoying.


David G4FTC

________________________________
From: Amps <amps-bounces at contesting.com> on behalf of Carol Richards <n2mm at comcast.net>
Sent: 25 September 2016 18:02
To: amps at contesting.com
Subject: [Amps] Buzzing transformer

Hello all....

This past weekend I ran into a new problem in the CQWW-RTTY contest. For
some reason, the power transformer in my Alpha 76PA started buzzing big time
everytime it was keyed.. The transformer is solidly in the amp so that's not
a problem. Early on, I asked a friend of mine in DL land if my signal was
clean and he responded YES !!! Then Saturday evening I received a report
that my signal had a buzz on it. Same problem on CW. I could understand a
bad tone if the electrolytics were bad, but I am not sure. HV is good, no
major drop when amp is keyed, and everything tunes up as usual. Anyone have
an idea where to start troubleshooing the amp? Has anyone else had this
problem?


Carol

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