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.
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