[Elecraft] KPA100 heat removal.

[Trevor Day]

Its wet and miserable here in SW UK Ron on New Years Day (HNY to all 
btw)  Ron, any chance of a link to a picture.  Its probably the effects 
of last night but my picture forming brain cells don't seem to be 
working well at present :-)

Trev G3ZYY

In message <000501c2b178$be053780$4c4a65da@RonWillcocks>, Ron Willcocks 
<ron_w@clear.net.nz> writes
>Seasons Greetings to all,
>                                     Today being New Year's Day and trapped
>at home, I decided to make up a "heat removal" gizmo for the KPA100, seeing
>as our Field Day is around the corner (Feb 22/23) and the temperatures are
>in the mid 20c region at present.
>In the large junk box here I found a 2" low profile 12v fan, and the perspex
>lid off an old stereo system that was about 1/4" thick. I cut the perspex to
>fit the top of the KPA100 so it overlapped the rear slightly and butted
>against the end of the heatsink fins at the front...and of course level with
>the sides.
>I then cut a 2" hole above the power transistors and another over the
>speaker.  I glued the fan over the appropriate hole, and glued four small
>strips of perspex under the outer edges of the panel to key into the fins of
>the heatsink. This holds the panel in place nicely,and allows it to sit
>flush on the heatsink. The fan is arranged to pull air out of the K2.
>Initial trials seem to indicate the system works fine. I just have to
>regulate the speed of fan, and the current thinking is that I will make up a
>variable arrangement using a transistor and variable pot. Possibly overkill,
>but it will allow me to adjust the speed should it be required.
>Anyway, if I need it, the "Heat sucker" is readily available and is quickly
>deployed.
>How does that stack up against other setups???  With  current "in shack" use
>the panel won't be needed, but I would rather have it available on FD and
>not need it, than need it and not have it!!
>Perhaps heat is not a problem in the North at the moment??
>73......Ron ZL1TW
>
>
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-- 
Trevor Day