[Amps] Hunter 2000c

[John Becker]

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 at 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.