Cooling Fans

[kd1na]

Ref. the message below:


I have never had any fan noise from my K3 that I could hear except when running a long winded qso on PSK31. Then the noise was barely discernable. #938.

Either I am stone deaf or Elecraft have gone to cheaper fans.

Dave KD1NA


I> Bill NZ0T Wrote
> <As I'm not a very technical person I just used a couple of resistors in
> <parallel to slow the fan down in my 4225.  I can't remember the values this
> <early in the morning but it seems to be working just fine.  The supply does
> <run a little warmer but not hot and the fan is no longer heard.
> <
> <Bill NZ0T


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[Eric Swartz - WA6HHQ]

They are talking about the fans on an external MFJ power supply. Not those on the K3 :-)

73,

Eric
_..._
-----Original Message-----
From: "David Robertson" <[hidden email]>
Date: Thursday, Aug 7, 2008 8:36 pm
Subject: [Elecraft] Cooling Fans
To: "Elecraft" <[hidden email]>

Ref. the message below:


I have never had any fan noise from my K3 that I could hear except when running a long winded qso on PSK31. Then the noise was barely discernable. #938.

Either I am stone deaf or Elecraft have gone to cheaper fans.

Dave KD1NA


I> Bill NZ0T Wrote
> <As I'm not a very technical person I just used a couple of resistors in
> <parallel to slow the fan down in my 4225.  I can't remember the values this
> <early in the morning but it seems to be working just fine.  The supply does
> <run a little warmer but not hot and the fan is no longer heard.
> <
> <Bill NZ0T



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[Brett Howard]

Usually the quieter fans are the more expensive ones...

On Thu, 2008-08-07 at 23:36 -0400, David Robertson wrote:

> Ref. the message below:
>
>
> I have never had any fan noise from my K3 that I could hear except when running a long winded qso on PSK31. Then the noise was barely discernable. #938.
>
> Either I am stone deaf or Elecraft have gone to cheaper fans.
>
> Dave KD1NA
>
>
> I> Bill NZ0T Wrote
> > <As I'm not a very technical person I just used a couple of resistors in
> > <parallel to slow the fan down in my 4225.  I can't remember the values this
> > <early in the morning but it seems to be working just fine.  The supply does
> > <run a little warmer but not hot and the fan is no longer heard.
> > <
> > <Bill NZ0T
>
>
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>
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[Gary, W7TEA]

I have to say that I expected the fans to be "whisper quiet" from all the favorable posts I'd read before receiving my K3. My previous history is with rigs having external cooling fins and no fans, so I'm probably spoiled regarding fan noise.  As much as I do love the K3, I hear the fans kick in when I have headphones on.  This happens after a fairly short CW qso at 100w.  The rig has been checked out at the factory, so I guess it re-affirms the notion that everyone's ears are different.  

Gary W7TEA
#1001


<quote author="David Robertson-6">
Ref. the message below:


I have never had any fan noise from my K3 that I could hear except when running a long winded qso on PSK31. Then the noise was barely discernable. #938.

Either I am stone deaf or Elecraft have gone to cheaper fans.

Dave KD1NA


I> Bill NZ0T Wrote
> <As I'm not a very technical person I just used a couple of resistors in
> <parallel to slow the fan down in my 4225.  I can't remember the values this
> <early in the morning but it seems to be working just fine.  The supply does
> <run a little warmer but not hot and the fan is no longer heard.
> <
> <Bill NZ0T


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</quote>