[Elecraft] [K3] Filter Cascade Effect

[Jim Brown]

On Fri, 11 Jul 2008 06:08:03 -0700 (PDT), Bill W4ZV wrote:

>My point is to realize that the cascaded BWs may be 20-25% less than what
>you think the maximum BWs are from their specs.

Right on!  BUT -- one good way to deal with this when you already own the 
narrower filter is to tell the K3 that its bandwidth is wider than it is. For 
example, I have tell the K3 my 400 Hz 8 pole filter is 500 Hz, and the 1.8 
kHz filter is 2.2 kHz. I find that I also want to shift the 1.8 kHz filter 
down about 150 Hz. 

Another point -- some have noted that at least some of the roofing filters 
are actually wider than their nominal value. 

73,

Jim Brown K9YC