I was the one who pretty much started this whole thing way back when
here are the specs
New Fan : Noctua NF-A6x25 FLXAirflow : 17 cfm (29.2 m3h converted to cfm)Noise 
: 19.3dbSpeed : 3000 RPM (at 12 v)Static Pressure : 2.18 mmCutent : 120 mA  
(.12 A)

Original Fan : UTEC AT6015L-12L2B-ND2Airflow : 15.4 cfmNoise : 24.8Speed : 3000 
RPM (at 12v)Static Pressure : 2.21mmCurrent : 100 mA
 

      From: Guy Olinger K2AV <k2av....@gmail.com>
 To: "drew...@verizon.net" <drew...@verizon.net> 
Cc: "elecraft@mailman.qth.net" <elecraft@mailman.qth.net>
 Sent: Saturday, January 30, 2016 6:19 PM
 Subject: Re: [Elecraft] Quiet fans for K3
   
This was discussed extensively in the past including alternate
brands, model numbers and sources. It's somewhere in the archives and
better than starting over from scratch.

73, Guy K2AV

On Saturday, January 30, 2016, drewko <drew...@verizon.net> wrote:

> What are the current options for quiet fans for the K3? My original fans
> are pretty quiet but at this time of the year when the windows are closed
> and the ambient noise level is nil, the fan noise really starts to bug me.
> It's the very slight rattle they make when they start winding up.. (In the
> din of summertime, can't hear myself think, let alone fan noise.)
>
> Sources? Prices?
>
> Are the newer Elecraft fans quiet? My PA is only a couple of years old so
> the fans are pretty recent model.
>
> 73,
> Drew
> AF2Z
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