[time-nuts] time-nuts Digest, Vol 79, Issue 31

Rick Karlquist richard at karlquist.com
Fri Feb 11 02:05:19 UTC 2011


Bob Bownes wrote:
> Ian,
>
> I've dropped the temp and the noise level in my 'lab' by replacing
> many of the old 110V fans whose bearings are getting on with more
> modern 'silent' 12V fans that use less power, move more air, and are
> far quieter than the 110 fans ever were. You can find them from a
> number of sources online, and while rated at 12Vdc, they run pretty
> well on anything from 5-15.

I don't see why changing the operating voltage of the fan would
make bearings last longer, move more air, or make less noise,
unless it allows the fan to run at a different RPM.  Even then,
more air and less noise would seem to be mutually exclusive.

Rick




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