[Elecraft] Thermal control for Q1 / Q2 in KPA100?

[Darwin, Keith]

As I'm thinking about trying to operate the K2/100 so the fan doesn't
run (or doesn't make noise) I wonder some things.
 
First, blowing air out of a box cools the box better than blowing air
into it.  I'm half surprised the fan blows in.  I suppose it is to
direct the stream of air on the finals.  Still, I wonder about doing it
differently.
 
What about thermal grease?  There is only a non-grease pad between the
transistors and the heat sink.  Would a dab of grease conduct more heat
away from the transistor?  I have some fancy "silver" stuff left over
from my computer assembly activities.
 
What power level should I run if I don't want the fan to come on?  75
Watts?  50, 30, 12?
 
- Keith N1AS -
- K2 5411.ssb.100 -