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

[Eric Swartz - WA6HHQ, Elecraft]

Bob, our KPA500 engineering project manager, will be contacting Klaus.

73, Eric  WA6HHQ

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www.elecraft.com


On 8/3/2011 1:37 PM, n5ge at n5ge.com wrote:
> 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
>>