[Elecraft] KPA500 Clicks & Pops

[AB4IQ]

Mine was a kit and does the same thing.  Sort of like Railroad Welded Rail,  in the summer it expands and shrinks in the winter.  We had the same issue with #6 solid copper on the communications lines.  It only does it on the KPA500 when I do a lot of RTTY or FT8.  Very seldom on SSB or CW.

ED..AB4IQ

-----Original Message-----
From: elecraft-bounces at mailman.qth.net [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Dennis Moore
Sent: Tuesday, October 16, 2018 4:14 PM
To: Elecraft Reflector <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] KPA500 Clicks & Pops

I rarely hear anything from my KPA500-F. Serious question, I wonder if those with the kit experience more noise than those with factory assembled units?

Dennis NJ6G


On 10/14/2018 19:52, Bob McGraw K4TAX wrote:
> What is the recommended solution to stopping the clicks and pops from 
> the KPA500 as the amp heats during transmission and cools during 
> receive?  I've seen one that suggested replacing the screws in the Z 
> bracket with 4-40 x 1/4".    Any traction to this?
>
> The amp performs absolutely fantastic.  The clicks and pops are more 
> annoying when working high duty cycle modes.
>
> Thanks in advance.
>
> 73
>
> Bob, K4TAX
>
> KPA500 s/n 3519

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