[Elecraft] Re:K2/100 Frequency Stability

[Don Brown]

Hi

The K2 already has several places the air can flow out of. The air is drawn
in by the fan and can exit between the top front cover and the heatsink
fins. Air also can flow under the control board around the front of the RF
board and out through the slots on the bottom. You can feel the air exiting
the slots in the bottom with the fan on high. So the heating problem is not
due to a lack of air exhausts.

Don Brown
KD5NDB


----- Original Message -----
From: <WA9GQT@aol.com>
To: <elecraft@mailman.qth.net>
Sent: Monday, December 16, 2002 2:04 PM
Subject: [Elecraft] Re:K2/100 Frequency Stability


>        I  have done the latest BFO stability modification BFOMDKT.  This
did
> a great job in reducing the K2 QRP drift.  Now we have introduced more
heat
> and need a way to control the temperature so this modification really
means
> something.
>        Again, I would like to suggest air openings in the KPA100 top cover
> panel so the K2 has a definite air flow from rear thru these openings. It
> seems that this trapped heat has to be removed in order for any drift mod
to
> be a success. I am hopeful that we can find some way to decrease this
drift
> we are seeing.  I don't think I am being a perfectionist , just critcal of
> more drift than necessary.
>        When I get time this week, I am going to remove the top cover panel
> and operate without it to see how much drift I have then.  I will report
back
> later.
>
> 73 & Seasons Greetings
>
> Rod Koch  WA9GQT   K2 #1900  KPA100
>
>
>
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