[Elecraft] KX3 heatsink question

[David Gow]

I have a later serial number with the improved heatsink and find it
completely satisfactory for PSK31 in typical QSO use.  I usually run about
8 watts and do monitor the final amplifier temperature  via the  screen
display.  It never gets anywhere near the shut-down level or "hot" to the
touch.  I do live in Seattle so the ambient temperature in the shack seldom
exceeds 80F and is mostly around the 68F furnace setting and also the
typical spring summer fall 60-75 daytime temperature here in the land of
eternal rain 9 months of the year and drought with sunny mild temperatures
for the other three.

Dave W7VM

On Tue, Mar 21, 2017 at 4:50 AM, Jerry <W1ie at jetbroadband.com> wrote:

> I bought a ProAudio heatsink for my KX# about 3 or 4 years ago and found
> that since I could read and handle some relatively simple hand tools,
> assembly was easy and straight forth. Using RTTY at full power, it got only
> warm - made a nice ham warmer in the colder mountain areas. The price you
> pay for ProAudio is well worth it.
>
> Best regards,
>
> Jerry, W1IE
>
>
> -----Original Message-----
> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of
> Howard
> Hoyt
> Sent: Tuesday, March 21, 2017 3:11 AM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] KX3 heatsink question
>
> Hi Rich,
>
> The advantages of a real aftermarket heatsink (not the poorly designed
> imports) is rapid thermal recovery after each transmit cycle and less heat
> re-radiated into the rig.  The import with the rounded fin root as well as
> others have a less optimum volume to surface area ratio and stay much
> hotter
> between transmit cycles. Also a good heatsink will allow higher power
> operation in temperatures we sometimes find ourselves when operating on
> picnic tables and the like in the summer!
>
> (commercial content) We find most of our customers who are occasional
> digital users are satisfied with the smaller of our two heatsinks, model
> Kx31, but the JT mode enthusiasts, especially contesters are going for the
> slightly larger Kx32 model.  Much more info on our website.  Just our
> experience...YMMV
>
> Howie - WA4PSC
> www.proaudioeng.com
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