[Elecraft] PROs/CONs on KPA100

[FISCHER,GREG]

There is a fan accessory from Ten Tec for the Orion that 
is mounted on a metal bracket.  It fits very nicely onto 
the KPA100 heatsink and is pretty quiet.  You can even put 
a resistor in the line and drop the voltage from 12V to 
5-7 V to cut down the RPM and make it almost dead quiet 
while still providing additional cooling at the heatsink.

Lets go even better for those who like to 
experiment....You can put together a simple but effective 
water cooling system such as what is used for computer 
CPUs.  Cut away the fins on the heatsink above where the 
finals are and mount a waterblock to the heatsink above 
the finals.  This will draw the heat to the liquid that 
goes to a small radiator for cooling.  A small pump keeps 
the system circulating.  This should keep the small fan 
from having to come on at all.

While this is a spur of the moment idea.....it seems like 
it should work....and well enough that you should be able 
to run digital modes without reduced power.

Has anyone tried something like this?

GL
Greg
AB7R


On Tue, 23 Jan 2007 12:01:04 -0500
  "Darwin, Keith" <Keith.Darwin at goodrich.com> wrote:
> I don't think this is true.  Before the KPA100, my K2 
>had no fan.  Front
> panel & control board ran with no cooling support and 
>drift was never an
> issue.
> 
> I run the KPA100 with an external fan which keeps the 
>hovercraft wizzer
> on the back of the rig from coming to life.  Again, the 
>front panel and
> control board operate with no cooling.
> 
> 
> - Keith N1AS - 
> - K2 5411.ssb.100 -
> 
> -----Original Message-----
>From:  Darrell Bellerive
> 
>>From what I understand, one of the reasons for the fan is 
>>to keep the K2
> RF, front panel, and control board components at a 
>fairly constant
> temperature to reduce drift, etc.
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