[Elecraft] Upper limits of KPA500?

[Macy monkeys]

I think reaching fan speed Level 5 requires clearance for take off :)

FWIW, Wayne answered my CQ on 40 CW today with his K4. Of course, it sounded terrific. I want one!! I wonder if I can convince the XYL to contribute her economic stimulus check to the cause? Hmmm...

John K7FD

> On May 3, 2020, at 7:42 PM, Andy Durbin <a.durbin at msn.com> wrote:
> 
> "It is interesting to hear how others experience their KPA500s over various conditions."
> 
> I have over a years's worth of KPA500 data recorded but it takes some effort to run it through the Excel templates to make pretty plots.
> 
> My KPA500 temperatures are strongly influenced by ambient temperature.  Shack temperature is often over 30 deg C in the summer months and it's not at all unusual for my fan to run at level 3 in FT8 QSO.  I think I have only reached fan speed 5 twice and that was while running temperature tests not while operating.   I terminated those tests at fan speed 5 and didn't wish to push it any higher.
> 
> So many people seem to think reducing the output power will keep the temperature down.  It does not.   Half power is about the worst heat dissipation condition for the KPA500.
> 
> 73,
> Andy, k3wyc
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