Sounds like one of tubes shorted. If they are still under warranty, I'd contact
RF Parts and see what they say. They replaced a tube I had that shorted.
73
Stan
KM4HQE
On March 9, 2018 11:11:45 AM CST, Bob <w3hkk@roadrunner.com> wrote:
>Bought this used from an estate sale in 2014. Worked great for 3
>yrs. Then a tube short blew a fuse. Replaced both finals and all was
>well until a few months ago. The amp worked well for a few
>transmissions, then the output went to zero. After a few cycles of
>this I noticed the grid current which rested at zero began to migrate
>negative. As it got worse, the output dropped to nil.
>
>One suggestion was that one of my new tubes ( from RF parts) is
>failing. Another was a possible problem in the AGC circuit.
>
>Other suggestions? Also, I may need a repair tech and don’t want to
>ship the amp, so someone in Ohio or driving distance from central OH
>would be a plus.
>
>Thanks.
>
>Sent from Mail for Windows 10
>
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