[Elecraft] K3: honest question re Audio Peak Filter

[Bill W4ZV]

Barry N1EU wrote:
> 
> I did a second experiment that gives another perspective:
> 
> http://n1eu.com/k3/ha8bt_apf.wav
> 
> This time the K3 selectivity was 50hz before applying APF.  The conclusion
> I come to after listening to this recording is by narrowing K3 bandwidth
> down to 50hz, you gain most of the benefit of the APF.
> 

I'm confused Barry.  What do you mean "before applying APF" since the K3
does not have APF.  Did you mean DUAL PB?

73,  Bill

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