[Elecraft] [K3] Roofing filters are misunderstood

[Josh Fiden]

 From an older Inrad writeup (and consistent with Wayne's):

"The term “roofing” stems from the fact that it protects the rest of the 
radio following it from out of the passband signals."

http://www.qth.com/inrad/roofing-filters.pdf

I like the term "preselector" from my 75S-1, but that doesn't fit well 
with selectable bandwidths.

73,
Josh W6XU

On 5/12/2014 12:01 PM, Bill Turner wrote:
> I still don't get it. What does the word "roof" have to do with 
> bandpass? That's where the confusion comes from.