[Elecraft] k3 fan noise

[eurom6]

Just finished my K3/100 and all's well but the fan noise is an aggravation. 
If I loosen the screws and hold the fans, no noise but when assembled it
sounds like the old card on the spokes of our bikes 50 yrs ago (obviously
much softer).  The back of the K3 is acting like a sounding board for the
fan and it amplifies and resonates.  Felt washers didn't help, tightening
hardware didn't help.  No fan wires in the way.  I noticed this is not a
common problem so I wonder if I have an out of balance fan/motor.  John 
N0GBR


H. Cary III wrote:
> 
> K3-100 #178 went together flawlessly, well almost, but it was smooth.  Was
> missing two standoffs and two screws for the fan assembly on the KPA-100.
> When I did the first fan check, the relay or relays clicked but only one
> operated very quietly (short lead) ...disconnected it as instructed,
> installed the KPA-100 module and reconnected the fans & panel per
> instructions.   Both fans operate this time but "WOW, is it every loud!" 
> - my wife came in from the next room wanting to know what was making the
> noise.  Her facial reaction when she realized it was the K3 clearly said:
> "This is the latest and greatest?"
> 
> Is it the missing hardware or are others experiencing noisy fans, too?
> I've got to fix this, both for my sanity and to save face!
> 
> Thanks for the help and Happy New Year.
> 
> 73,
> Cary, K4TM
> K2-100 #5266
> K3-100 #0178
> 
> 
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