Jim,
My first KPA500 did that occasionally, so I don't think it's an issue.
I'd guess it has to do with line voltage variances.
73,
Scott, N9AA
On 6/11/13 10:51 AM, Jim Miller wrote:
I leave my KPA500 back panel switch in the ON position most of the time and
use the front panel switch to bring it to life.
However in even when in the "Front panel off/Back panel on" state the
KPA500 will occasionally hum for a few seconds.
Is this normal? Any suggested causes to worry about?
Thanks
jim ab3cv
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