[Elecraft] KPA-500 HUM from PA and not from Speaker !!!

[Rick Tavan N6XI]

I have experienced absolutely no hum, either mechanical or electrical,
associated with my KPA500 in either of my two ham shacks.

/Rick N6XI

On Tue, Aug 2, 2011 at 11:08 PM, Klaus Koppendorfer <KK at ccf.net> wrote:

> discussion is drifting away to amplified speakers but there is realy a
> problem with
> HUM comming from KPA500
>
> 1) HUM during transmit
> 2) HUM somes sometimes when the KPA500 is off, but on line and backswitch
> on
>
>
-- 
Rick Tavan N6XI
Truckee, CA