All good ideas John as a Dahl transformer going open is a bit of a stretch
unless a lead came loose inside it.
Carl
KM1H
----- Original Message -----
From: "John Becker" <johnb3030@comcast.net>
To: <amps@contesting.com>
Sent: Saturday, June 09, 2012 4:21 PM
Subject: Re: [Amps] Hunter 2000c
> When I was in college, we had a Hunter Bandit 2000C at the W9BGX club
> station. It was a kit and I built it.
>
> Check the solder connections where the ends of the filament choke
> connect to the terminal lugs. This was a pre-fabricated assembly in the
> kit, and after several years we discovered the solder joints had melted
> repeatedly resulting in a bunch of classic cold solder joints. After
> re-soldering, the amp actually put out more power than it had on day one.
>
> We didn't experience a total filament circuit failure as you have, but
> what caused us to look at it was that one of the tubes appeared to have
> an open filament. That was another cold solder joint, as the 3-400s had
> pins which were soldered to the filament leads from the tube. A little
> re-soldering and the tube was good as new.
>
> 73,
>
> John, K9MM
>
> amps-request@contesting.com wrote:
>
>> We'll it was fine the day before yesterday, but last night I turned it on
>> relays closed on xmit and no output. I looked and found the filaments
>> were
>> not glowing so suspect that circuit has an issue.
>
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