The way it has been described, you only need to turn it on when you need it … 
so you can run the radio as a straight SDR or a hybrid SDR, switchable on the 
fly.

Whether or not doing so changes the volume … ???  The bandwidth (and audio 
levels) is set by the SDR processes in both cases, so it would be a reasonable 
assumption that it wouldn’t change, and the hybrid module would switch in the 
appropriate roofing filter automatically.

Wild guesses, of course.  But not unreasonable  :-)

Grant NQ5T



> On Nov 1, 2019, at 4:09 PM, <[email protected]> <[email protected]> wrote:
> 
> I believe that using a roofing filter that is about as narrow as the overall
> receive bandwidth can have a detrimental effect on ssb voice quality as well
> as on digital mode reception. Will the K4HD have a single button way to
> remove the superhet part so that receive quality can be easily compared
> without change of overall bandwidth and volume?
> 
> 7
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