[Elecraft] APF vs 10 Hz DSP, why they don't sound the same

[Paul Christensen]

> DSP.  I have a feeling that this is a very narrow and high-Q response
> that is on the verge of ringing, but it should be possible to
> duplicate the circuit in the DSP.

And only subject to the remaining DSP processing power within the K3.  A 
traditional, single parametric EQ channel with variable Q, amplitude, and 
frequency range (e.g., 300 Hz - 1200 Hz), would work very well.  A quick 
measurement of the FT-1000's APF peaking gain and Q could be used to 
establish initial parameters.

Paul, W9AC