Great idea, John. That is exactly what I found when I had a Centaur, but
your idea never occurred to me. An acoustics engineer where I work told
me the problem was that the slots were too small/restrictive and too
close to the fan input, and that if I opened up the input by punching
holes, or removing all the material in front of the intake that it would
quiet down. It's too bad TT didn't try what you suggest - it might have
improved the word of mouth on the Centaur and given it a longer lifespan.
They are a nice little amp with the noise issue resolved. (totally
quiet with the covers off, by the way.)
73, Duane
On Sat, 29 May 2004 08:01:56 -0500 "John Rader" <k5xtx@hotmail.com>
writes:
> I have found through a litttle observation that the fan intake grill
> is too
> restrictive. The resticted airflow causes the fan blades run in a
> stalled
> condition which is inefficient and noisy. I carefully bent each
> intake rib
> on the case up about 45 degrees. This increases the intake area and
> smooths
> the air flow. A pair of worn (smooth) needlenose pliers was used to
> bend
> each slat. The appearence is uniform with little sign of paint
> stress.
>
> Bottom line, the exhaust is 10 degrees cooler then stock, and a
> little
> quieter.
> John K5XTX
>
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--------------------------------------
Duane Calvin, AC5AA
Austin, Texas
http://home.austin.rr.com/ac5aa
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