[Elecraft] KPA500 thermal clicks

[Jim Sheldon]

I've had my KPA500 for a few years now.  I built it from a kit.  The only time I ever hear what you describe is when I've been long winded on RTTY.  

I run it @ 450 Watts out no matter the mode and I never even get a fan speed increase unless I'm in a RTTY rag chew and normally never hear any thermal clicks.  

I don't worry about it or let it bother me.

Jim, W0EB

> On Jul 18, 2018, at 9:38 PM, Randy Farmer <w8fn at tx.rr.com> wrote:
> 
> I have never heard anything like that on my early kit-assembled KPA500. But... I've only used it extensively on CW. It would be interesting to know if the clicks are being experienced only under high duty cycle usage such as digital modes or if they have also been heard in CW/SSB duty.
> 
> 73...
> Randy, W8FN
> 
>> On 7/18/2018 6:25 PM, ANDY DURBIN wrote:
>> I placed my Android phone on top of my KPA500 and made a recording while making a few cycles of FT8 TX/RX.  The audio files can be found here:
>> 
>> https://www.dropbox.com/sh/amfy3dz8pgl083n/AAAKi2GYripXyIDjiLpJ2hDwa?dl=0
> 
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