[Elecraft] 8 pole vs 5 pole..I knew this would happen

[waltk8cv4612amos at peoplepc.com]

What is the first thing rain hits when coming down from the sky ?

What is the first thing a signal hits after the first mixer coming down from 
the sky ?

What is a leaky roofing filter ?

It's what is in the K-3 <G> since it lets the signal from SOMEBODY through 
to your ears!

Walt K8CV Royal Oak, MI.

----- Original Message ----- 
From: "Fred (FL)" <ncsailors at yahoo.com>
To: <elecraft at mailman.qth.net>
Sent: Thursday, May 03, 2007 12:55 PM
Subject: [Elecraft] 8 pole vs 5 pole..I knew this would happen


>I think, still, someone needs to define what a ROOFING
> FILTER is.   Say for sake of argument - I have a
> passive or active or crystal filter - and it is to
> be used as a ROOFING FILTER.   Why is it called this?
>
> Why is the filter itself, called a ROOFING FILTER?
> And where does the adjective, ROOFING, come into
> play?
>
> ...... I'm sure I'm dumb on this one - but would
> like to learn.  Not until the K3 came on the
> Elecraft scene - did anyone mention or get
> concerned about the need for ROOFING FILTERS.
> Now they're all the rage?
>
> Fred, N3CSY
>
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