[Elecraft] k3 fan noise

[Bill W5WVO]

You're right that it is uncommon. Properly installed, the fans are
completely inaudible. I believe all the instances where fan noise has been
encountered were traced down to some kind of assembly error. Probably Don
could point you in the right direction. (Of course, a bad fan is possible as
well. Just never heard of one on this list.)

Bill W5WVO

----- Original Message ----- 
From: "eurom6" <eurom6 at cox.net>
To: <elecraft at mailman.qth.net>
Sent: Sunday, July 06, 2008 7:35 PM
Subject: Re: [Elecraft] k3 fan noise


>
> 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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