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

[n5ge at n5ge.com]

Klaus,

I know you've already contacted Elecraft Support about this.  Right?

If you have not, you will have a good deal more success contacting them, since
they have probably already seen this before and know what to look for.

73,
Tom
Amateur Radio Operator N5GE
ARRL Lifetime Member
QCWA Lifetime Member


On Wed, 3 Aug 2011 06:08:42 +0000, 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
>
[snip]