[Elecraft] K3 receiver noise questionable test results

Al Lorona alorona at sbcglobal.net
Sat Dec 19 01:40:19 EST 2009


> But a few of the K3 owners that have pro-audio 
> instrumentation have reported that the K3 audio 
> response is more like 'white noise' (a flat response), 
>as opposed to other receivers which have a 'pink 
> noise' audio spectrum.

If that's the case, then the K3's receiver equalizer can be set up to mimic a pink rolloff which is -3 dB per octave. 

50 Hz    :    + 9 dB
100    :    + 6
200    :    + 3 
400    :    0
800    :    - 3
1600    :    - 6
3200    :    - 9

or if 3 dB per octave is a little severe, then one could try 2 dB per. 

This is awfully conjectural until we can quantify exactly what it is that a Yaesu FT-1000 has that a K3 doesn't.

One of the guys at work has pasted on his cubicle wall that famous quote of Lord Kelvin that I believe applies here: 
When you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge of it is of a meager and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely, in your thoughts, advanced it to the stage of science.
Sir William Thompson, Lord Kelvin (1824-1907) 


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