I think of low pass roofing filters as shed roofs,
where the rain runs all off one side and bandpass
roofing filters as peaked roofs where the rain runs
off both sides. Works for me!
Dave, VE1ADH
--- w8au@sssnet.com wrote: > At 10:11 PM 12/24/2003,
RON ZOND wrote:
>
> >Please explain the term "roofing filter". What type
> of filter is it, and how
> >does it get its name? How does it differ from the
> standard filters with
> >which I am familiar?
>
> In the Microwave world, "roofing filters" refer to
> low pass filters
> with a high frequency cutoff. (symbolic of a
> "roof")
> I have noticed all the talk about roofing filters
> with respect to
> receiver front ends, and have not questioned it as
> you have, since
> I knew what was being spoken of.
>
> But your question is a good one. How did a basic
> "bandpass"
> filter become known as a roofing filter? Ham
> interpretation?
>
> Perry w8au
>
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