[Elecraft] Roofing filters and DSP bandwidth tuning

[john at kk9a.com]

These are roofing filters, they do not effect how narrow the bandwidth  
can be adjusted.  FWIW, I have both the 400 and 250 8 pole filters. If  
money is an issue, I believe that there is very little bandwidth  
difference between the two.

John KK9A


NJ Mike wrote:

If I understand it correctly, as you turn the bandwidth knob
counterclockwise, the filter narrows.  At some point, it hits the next
roofing filter and then....narrows more?  Just trying to understand so I can
get the right filters.  Rig A (below) is what Elecraft recommends for my
operating profile.

What would be the difference between the following three examples, as far as
how narrow the bandwidth could actually be adjusted?

Rig A with 2.8, 2.1, 400, 250, 200 filters
Rig B with 2.8, 2.1, 400, 250 filters
Rig C with 2.8, 2.1, 400, 200 filters