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 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
