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

[Fred Jensen]

On 8/3/2011 9:40 AM, Rick Tavan N6XI wrote:
> I have experienced absolutely no hum, either mechanical or electrical,
> associated with my KPA500 in either of my two ham shacks.
>
> /Rick N6XI

Nor have I in my one ham shack.  In fact, the only time I've heard the 
fans come on is when I shut the amp off at the front panel *and* have my 
hearing aids back in.  YMMV, but my K3 and KPA500 appear to be silent 
devices.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2011 Cal QSO Party 1-2 Oct 2011
- www.cqp.org