[Elecraft] KPA500 Z Bracket

[Wes]

There can be another source for "clicking" in the KPA500. See: 
https://groups.io/g/Elecraft-K3/message/38986


On 11/13/2024 7:03 PM, Andy Durbin wrote:
> I found the thermal clicking to be annoying and I tried to understand what caused it.  I instrumented my KPA500 with thermistors on the heat sink and on the Z bracket.  I recorded these temperatures together with the standard finals temperature over many hours of KPA500 use.
>
> I could see that the thermal flow between the heat sink and the Z bracket changed direction and I speculated that this changing thermal gradient was causing differential expansion and contraction.  I planned to put thin mylar isolation strips between the Z bracket and heat sink and between the heat sink and the side panel.  I thought these would allow the surfaces to slip without making any noise.
>
> However, my natural procrastination paid off and my KPA500 stopped clicking before I got round to implementing any fixes.
>
> Andy, k3wyc
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