[Elecraft] KPA1500 reduces power as it gets warmer?

[Mike Fatchett W0MU]

The engineer that created the amp recently said that you should let the 
amp handle the fans.  It should be in the archives here on this list.

W0MU

On 6/6/2022 9:52 AM, Andy Durbin wrote:
> "You should be running fans full-speed under those conditions if you want it to live long!"
>
> Please share any data you have that supports any claim than running continuous full fan on any Elecraft amplifier has any advantage over letting the firmware control the fans based on PA temperature.
>
> The disadvantages are obvious - fan wear, noise, dust contamination.  Yet I see no evidence that finals run significantly cooler.
>
> As I have posted earlier - my station controller has the option to run my KPA500 fan at any preset speed when TX starts and keeps it running for a pre-set time after TX stops.  That time is set to keep the fan running continuously during an FT8 QSO.  I have not used the option since I verified it functioned as intended as I saw no significant thermal management advantage.
>
> 73,
> Andy, k3wyc
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