[Elecraft] Samelex Power Supplies with a K3

[Phil Hystad]

Oh, I too remember now, my K3/100 has fans, I remember putting them in.  But, I think they are broken because I NEVER hear them. 

PEH's FIVE solutions to fan noise...

(1)  Use headphones.
(2)  Turn the sound up on your K3 speakers.
(3)  Use digital interfaces and play background music while you operate with your computer.
(4)  Put a wind-chime behind your K3 and listen to the sweet tinkling notes instead of the fan.
(5)  Receive on your K3 (fan not needed), transmit on your KX1 (no fan).


On May 23, 2010, at 8:52 AM, K4ia wrote:

> I have never heard the K3 fans. Two fans at very low speed make no  
> noise.
> 
> Craig Buck
> 
> On May 23, 2010, at 11:34 AM, Darrell Bellerive <drbellerive.va7to at gmail.com 
>> wrote:
> 
>> I agree! I would rather have a larger, more expensive box with a big
>> heatsink than a fan. The only fan I have ever heard that was silent  
>> was
>> one with the blades and motor removed and destroyed. :-)
>> 
>> Most people don't seem to notice the noise so I guess we just have to
>> endure it as we seem to be very much the minority and manufacturers  
>> just
>> won't spend the extra money to eliminate the fan.
>> 
>> I have a Yaesu FT-8900R in my truck mounted enclosed in the centre
>> console. Even with road noise at freeway speeds, I notice when its fan
>> cuts in. Most people do not find the fan in this radio offensive and
>> consider it quiet. I suppose I just have a high sensitivity to fan  
>> noise.
>> 
>> From my work in the audio industry I have come to the conclusion that
>> sound is very subjective. Each person seems to have their own idea of
>> what sounds good and bad. I think that people get used to a certain
>> colouration or lack of colouration and that becomes the standard to
>> which they judge.
>> 
>> That is why some people will praise a particular loudspeaker and  
>> others
>> will find it offensive. My work with broadcast radio stations in parts
>> of South America, found that the norm was to overmodulate the  
>> signals to
>> get the loudest signal on the band. The distorted sound became the  
>> norm
>> and people expected other sources like CD's to sound the same.
>> 
>> The same phenomena is happening with the new flat screen TV's. They  
>> are
>> put in stretch mode to fill the screen and people just don't seem to
>> notice the distorted picture.
>> 
>> I was very disappointed to see the big fan on the new KPA500. I have a
>> KPA100 that is still not finished because I keep looking at the fan  
>> and
>> wondering why I bought something with a fan.
>> 
>> Eric and Wayne, would you consider a larger heatsink as an option to
>> have a fanless KPA500?
>> 
>> Darrell
>> VA7TO
>> 
>> On 2010.05.23 7:08 AM, Steve Ellington wrote:
>>> Paul....It makes me wonder if they couldn't just put a decent heat  
>>> sink on
>>> those switchers and virtually eliminate the fan or at least make it  
>>> very
>>> rare to ever turn on. I realize they want to keep them small and  
>>> lightweight
>>> and I guess fans are cheap and light but I sure do hate the racket  
>>> they
>>> make!
>>> 
>>> Steve
>>> N4LQ
>> 
>> -- 
>> Darrell Bellerive
>> Amateur Radio Station VA7TO
>> Grand Forks BC Canada
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