[Elecraft] Samelex Power Supplies with a K3

[K4ia]

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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