No larger heat sink exists that I've heard of.
I believe you said you run a high duty mode. If
so, the existing heat sink should be fine if you
back the power down to 25-30 W. Not so good at 100
W and high duty cycle.
Phil W7OX
On 9/28/14, 12:01 PM, Paul Metzger wrote:
My point is to avoid using fans to cool this radio so as not to aid in
depleting the batteries in this emergency radio go box, while creating
additional noise for the operator. I'm on the fence as whether to take this
K2/100 down to a machine shop and see what they can do to place a more adequate
heat sink on it, or instead just install my Yaesu FT100D.
In the past, I had purchased a 3 1/4" size fan to cool the K2/100, but it wasn't enough. I then purchased a second one and ran them both to keep the heat manageable. In doing so, the whine/noise that the fans had created had forced me to operate with headphones. This was a very annoying experience.
I think a larger heat sink will work for me, I simply need to find if any such
animal exists for this radio (lid configuration). Thus why I posted here.
Thank you all who have responded. I appreciate your time and knowledge shared.
My hope is to use my K2/100 in my emergency radio go box. I love the radio in
every other respect, except for the issue of it dissipating heat.
Paul Metzger - K6EH
----------------------------------------------------------------------
Sent: Sunday, September 28, 2014 at 10:09 AM
From: "Fred Jensen" <k6...@foothill.net>
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
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 have to move very much air over it to keep it cool.
73,
Fred K6DGW
- Northern California Contest Club
- CU in the 2014 Cal QSO Party 4-5 Oct 2014
- www.cqp.org[http://www.cqp.org]
On 9/28/2014 12:18 AM, Jim Brown wrote:
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.
73, Jim K9YC
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