[Elecraft] Re: roofing filter loss and method of compensation

[Lyle Johnson]

> Will the variable bandwidth filters have better
> ultimate rejection/less blowby than the variable
> bandwidth filter in the K2?

With the IF DSP in the K3, the issues that are of concern in a fully 
analog radio are less important.

As long as the crystal filter, which is being used as a roofing filter, 
has reasonably good skirts and ultimate rejection, the DSP will take 
care of the rest.  The first 20 dB or so of skirt selectivity, the 
passband ripple, and the ultimate rejection at the DSP IF image 
frequency are the most critical factors.

73,

Lyle KK7P