[Elecraft] KPA500 Clicks

[Jessie Oberreuter]

      This came up recently w/ the K3 as well, and perhaps a year or two 
back.  It /sounds/ like a tiny relay is clicking in the K3 on t/r 
switching even though it's all solid-state.  Wayne speculated that the 
sound might be coming from relay springs re-balancing slightly in response 
to associated voltage changes on the power rails.  I don't believe it's 
been tested further.  Perhaps you're hearing something similar from the 
KPA500.  -kb7psg


On Mon, 27 Jan 2014, zendoc at netspace.net.au wrote:

> FWIW, I've noticed these clicks from within my KPA500 too.  I always
> assumed they were thermal expansion and contraction of hardware within
> the amp.  I ignore them because they have
> never been associated with any problem with the function of the amp. 
> Besides,  I don't know how you'd begin to try to isolate exactly
> which bit of metal in there is doing the clicking to be able to do
> anything about it.
>
> 73,
> John
> VK7JB
>
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