[Elecraft] : K3 receiver noise questionable test results

[Julian, G4ILO]

Joe Subich, W4TV-4 wrote:
> 
> 
> 
> If one is going to attempt to mimic the "pink noise" behavior, 
> there is no need to bother with the low frequency boost.  It 
> simply puts more strain on the audio amplifier, increasing the 
> amount of IMD products, with little or no aural benefit.  A 
> better RX EQ configuration with essentially the same perceived  
> sound: 
> 
>   50:  -16 dB (reduce sub-vocal noise and hum) 
>  100:    0 dB 
>  200:    0 dB 
>  400:    0 dB 
>  800:    0 dB 
> 1600:   -3 dB 
> 2400:   -5 dB 
> 3200:   -6 dB  
> 
> 

I agree the 50Hz boost adds nothing useful, but I find to increase the 100,
200 and 400 values make the audio sound more balanced and easier on the
ears. This is not boosting the bass so much as trying to compensate for the
bass roll-off inherent in the K3.

I will agree that low frequencies have no benefit when trying to copy weak
signals but surely it is the role of the filtering to cut out those
frequencies by manual adjustment when trying to receive a weak signal? The
purpose of equalization is to achieve a pleasant and balanced audio response
for general use.

-----
Julian, G4ILO. K2 #392  K3 #222.
* G4ILO's Shack - http://www.g4ilo.com
* KComm - http://www.g4ilo.com/kcomm.html
* KTune - http://www.g4ilo.com/ktune.html

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