[Elecraft] KPA 500 birdies

[Don Wilhelm]

Steve,
  I just cannot unserstand how the KPA500 can create birdies during 
periods of receive.
I would you suggest that you look for other potential problem sources 
such as loose PL-259 connectors.

73,
Don W3FPR

n 1/28/2012 8:44 PM, Stuart Dunk wrote:
> G'day all.
> I have a KPA 500 Sn 423 and have discovered birdies every 10khz or so on 20 thru 6m, worst on 10m indicating about 1 s point on the ft1000 mk v field.
> I have checked for external sources, earth loops, wall warts etc.
> The noise is present when there is something plugged into the output of the amp, I use the term something plugged into the output because no matter what , antenna or coax patch cable or dummy load as soon as it is connected to the amp output the noise starts.
>
> I have made up a sniffer antenna to hook up to the output to check various positions in the shack but the intensity of the noise will not change.
> I have checked all the internal connections in the amp all the screws are tight and dimming the LCD makes no difference.
> Has any one come across this in their amp if so did you find a fix.
>
> Regards
> Stu
> VK4SDD