Many of us place a small muffin fan on top of the K2 heatsink. I have my
muffin fan housed in a small plywood box (blowing down at the fins) with a
resistor in series with the fan so that it turns fairly slowly and makes no
noise at all. With this auxillary cooling the noisy little fan in the 100W
amp almost never comes on. I often run CW at 100 watts output and the
internal fan only comes on after an especially long transmission.
Don K7FJ
Could the fan in the KPA100 be eliminated with a different heat sink?
--
Darrell Bellerive
Amateur Radio Stations VA7TO and VE7CLA
Grand Forks, British Columbia, Canada
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