[Elecraft] Successfully using a micro fan to keep K2 cool

[Ron D'Eau Claire]

Good grief! How cool do you want to keep the K2? 

Several years ago I ran some tests for one of the engineers to check the
K2's frequency stability vs. temperature. Several testers and I cycled the
K2's internal temperature by hooking on a suitable dummy load and
transmitting for extended periods so the 100 watt PA would cook the insides.
(Some actually did the "brick on the key" routine from what I recall.) 

Mine was heated enough I couldn't keep my hand on the PA heat sink and the
internal air temperature was well above 120F. That was done dozens of times
with no deleterious effects on the K2 or the amp, then or since.

I have used a 4" square muffin fan sitting in rubber feet on top of the K2
running at a slow speed, not to keep it any cooler but to avoid the noisy
little fan on the back from running. 

Ron AC7AC



-----Original Message-----
How noisy is it ?

One idea I've had for a long time is to remove the elecraft fan on 
the rear of K2 and find a hose of the proper diameter, somehow 
mounting it in a semi-permanent fashon.  at the other end of the 
hose, a box with a big fan that can really blast some serious air 
through the K2.  Put the box on the floor or in the next room so you 
don't have to hear it.

Any thoughts ?

TR, WB6TMY K2 S/N 838