[Elecraft] KPA500 Hum

[Nr4c]

Prob. The front switch is a “soft switch”. Wakes up the amp from a nap. 

Sent from my iPhone
...nr4c. bill


> On Jan 4, 2019, at 12:57 AM, John_N1JM <johnn1jm at gmail.com> wrote:
> 
> I don't use my KPA500 a lot, but I just noticed with only the back switch on
> I can hear a hum coming from the amp. It disappears of course when I turn
> the switch off. Is this normal?
> 
> 73, John N1JM
> 
> 
> 
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