John et al:
With my KPA500 and SSB rag chews I keep the fan on NORMAL. It does
cycle on and up from time to time. When operating digital modes at 400
to 500 watts, I set the fan to 1. It still does move to higher speeds
during transmissions as the TEMP gets to 60 degrees or so. Then drops
back to level 1. As to operating at 2, other than the amount of added
noise and a bit of wear, I see little disadvantage or advantage for that
matter. At the same time, I agree that heat is the most damaging
component to solid state devices.
By the way, as my amp fan is about 4" from the wall behind it, adding
some acoustic material on the wall behind the amp I find soaks up some
of the noise.
73
Bob, K4TAX
On 11/30/2018 9:30 AM, Monkeys wrote:
Is there any harm in setting the fan at level 2 and just leaving it
there? I would think the fan might wear out a little faster, but how
much faster? The reason I ask is that when the fan control is set to
NOR I find that the fan eventually...and understandably... kicks into
a super high speed whine on extended CW ragchews. But I have found by
setting the fan control to 2, the amp seems to like this 'pro-active'
cooling. I can ragchew to my heart's content and it never goes into
that high speed jet-taking-off or vacuum cleaner level. Has anyone
else changed their fan from NOR to 2 as a default and experienced any
side effects?
John K7FD
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