We will let the heatsink get up to 85C before dropping the KPA3
off-line, that still has plenty of safety margin for the transistors.
40-42C is actually on the cool side for heavy usage. But it never hurts
to keep it cool if you don't mind the added fan noise. Fortunately the
K3's dual fans are pretty quiet even at the higher speeds.
73, Eric WA6HHQ
hank k8dd wrote:
How hot does your K3/100 PA run?
And how hot is safe?
I was sitting in a pileup at 90 watts and watching the PA Temp - it got up to
around 41 or 42 C (about 100 F) so I turned the fan up a notch or two and it
cooled right back down to around 20 C (70 F).
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