[Elecraft] Dual PB filter

[David Wilburn]

It has really saved the day on a couple of RTTY QSO's.  That is the 
only place I have used it.

David Wilburn
K4DGW


alsopb wrote:
> Anybody out there playing with this feature or actually used it in a contest?  
> What are your experiences?
> 
> Playing with it yielded the following:.
> 
> 1) Narrower CW filters can't be used (at least not my 400 Hz and narrower
> filters).  The wings are outside the narrow filter passband.
> 2) For me that meant the 1.8KHz roofing filter was used.
> 
> It seems like that defeats the purpose of having a K3.  In a contest
> situation, I would certainly like as many rock crusher signal outside the
> roofing filter passband as possible.
> 
> It would suggest one might consider the 1 KHz roofing filter, if you want to
> seriously use this option.
> 
> If there existed some intermediate (say 700Hz) or variable roofing filter, 
> what would it's width have to be to include the wings and be used for dual
> PB filtering?
> 
> de Brian/K3KO