You could try 2 x 12V fans in series to give a bigger cooling area but
smaller current; I did this once on a noise-critical application.
In terms of S units at the other end, turning down the power, say 25% makes
sense.
David
G3UNA
I run a 4" (120mm) computer case fan that the specs say dr
red Jensen"
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Any larger or more efficient heatsinks available for
the K2/100PA (radio lid/top)
Before selling my KPA100 and KAT100, I used my K2 in RTTY contests. I
stuck an old computer brushless DC muffin fan down over the warmest part
I have never heard of a third party replacement heat sink for the K2/100.
I run a 4" (120mm) computer case fan that the specs say draws all of .15
amps, 1.8 watts @ 12V, at full speed.
It probably doesn't need to turn that fast to adequately cool the heat
sink so the current draw could be much l
AM
From: "Fred Jensen"
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Any larger or more efficient heatsinks available for
the K2/100PA (radio lid/top)
Before selling my KPA100 and KAT100, I used my K2 in RTTY contests. I
stuck an old computer brushless DC muffin fan down ove
Before selling my KPA100 and KAT100, I used my K2 in RTTY contests. I
stuck an old computer brushless DC muffin fan down over the warmest part
with a little square of velcro, blowing down. I could run 100W
[generally didn't but could] and the heat sink stayed almost cool. I
don't think you h
On Sat,9/27/2014 5:54 AM, Don Wilhelm wrote:
Take a look at the K2 Auxiliary KPA100 Cooling Fan
Yes. And almost any generic muffin fan will push some air across a heat
sink or into a power amp to improve air flow. I have a couple of 12V
vans with power poles on them that I deploy as needed.
Take a look at the K2 Auxiliary KPA100 Cooling Fan designed by Tom
Hammond N0SS (SK).
It is on his website maintained by the MMARC at
http://www.mmccs.com/mmarc/n0ss/
Scroll down the opening page to K2 Specific Files, and then scroll down
that page to the link to the pdf file.
73,
Don W3FPR
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