[Elecraft] Hum on KPA1500

[Ken Winterling]

Carl,

Does this also happen when directly connected to a dummy load?  If not then
maybe you have an RFI problem.  Check all antenna connections and jumpers.

GL!

Ken
WA2LBI



On Sun, Apr 5, 2020 at 4:51 PM Carl Yaffey <cyaffey at columbus.rr.com> wrote:

> I have developed a loud hum with the KPA1500 on 17m and 15m. A slight hum
> on 20m. All other bands, no hum.
> It’s power dependent. Loud at full power, hum reduces as power is lowered.
> Not too bad at 500w.
> Suggestions?
> 73.
>
> Carl, K8NU.
>
>