[Elecraft] Quieter fans on the K3 ?

[Clay Autery]

Fan selection depends on a LOT of different factors....  rated fan speed
vs. voltage applied, CFM vs fan speed, dB vs. speed vs. CFM. Min/Max
current required, dimensions including thickness, type of bearing
system, etc, etc...
Ambient temperature....  Inlet restrictions, outlet restrictions,
internal obstructive flow....  thermal loading, etc etc...
Isolation mounts are simply one consideration.

BUT, anyone considering the replacement of stock fans should insure that
the replacement part supplies the same or more air volume at each speed
level.... unless you're planning to do a detailed study of your
operating condition to make sure the air delivered will accomplish the
thermal control required.

______________________
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 2/11/2017 10:27 AM, Harry Yingst via Elecraft wrote:
> A few years ago I replaced the stock fans on my K3 with the Noctua NF-A6x25 FLX fans and rubber mounts.  The new ones are much quieter and the low rumble is gone.
>
> Last night I got thinking about the fans and about the rumble of the stock ones. 
> The question I now have is I wonder if the low rumble would be cured with just the use of the rubber mounts removing the need for new fans.
>
> If someone is looking to quiet their fans wants to experiment with just replacing the mounting screws with the rubber mounts.  I would be interested in knowing how much of a change they notice.
>
> Thank you