[Elecraft] KPA500 - Advantage of min fan speed?

[Michael Walker]

I got the thresholds from Elecraft directly.

I never worried too much about them since the Elecraft guys are pretty
smart people and likely have done a lot more research on this than most of
us.

Mike va3mw


On Mon, Sep 30, 2019 at 9:28 AM Mike Maloney <ac5p at sbcglobal.net> wrote:

> Thanks Mike for the KPA-500 fan level settings.  That answers the question
> I was going to ask.   Could find no fan level info in the owners manual or
> from previous posts.
> I don't suppose any record kept of SPL  readings at the different levels?
>   Anyone done that?
>
> 73, Mike AC5P
>
>
> On Sunday, September 29, 2019, 10:08:41 PM CDT, Michael Walker <
> va3mw at portcredit.net> wrote:
>
>
> Here are the thresholds
>
>
> level 1: 50 degrees
> level 2: 55 degrees
> level 3: 60 degrees
> level 4: 65 degrees
> level 5: 70 degrees
> level 6: 80 degrees
>
> if the temperature gets above 90 degrees we throw a fault and drop into
> standby (with fault showing).
>
> Mike va3mw
>
> > On Sep 29, 2019, at 10:38 PM, Andy Durbin <a.durbin at msn.com> wrote:
> >
> > The KPA500 offers a minimum fan speed setting which is settable by menu
> or serial command.  Some posters have advocated setting a minimum fan speed
> higher than zero, presumably thinking it offers some advantage in thermal
> management.
> >
> > Does anyone have any hard data that shows that the KPA500 runs cooler,
> or with lower peak fan speed, when minimum fan speed is set above zero.
> >
> > Running a rigorous test may not be easy since it would seem to require
> the same ambient temperature, same finals starting temperature, same TX
> periods, and same antenna system load.
> >
> > I'm curious because, before CQ-WW-RTTY I configured my KPA500 to set min
> fan speed to 1 at start of TX and reset min speed to zero 30 seconds after
> stop of TX.  Of course the fans ran faster than min speed during TX but I
> don't have any feel for whether the higher speeds were any more protracted
> than before the min speed change.
> >
> > Please share you experience of using min fan speed greater than zero,
> and any data if you have it.
> >
> > 73,
> > Andy, k3wyc
> >
> >
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