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

[Simon Brown (HB9DRV)]

A lack of understanding is also shown in the FT-2000 Yahoo! group. A fine 
document which explains traditional roofing filters is here: 
http://www.qth.com/inrad/roofing-filters.pdf . The FT-2000 is an 
up-conversion receiver (unless I've lost the plot again).

Elecraft's design is more subtle and has been explained several times in 
this list.

Simon Brown, HB9DRV

----- Original Message ----- 
From: "Darwin, Keith" <Keith.Darwin at goodrich.com>


Roofing filters - I think the term has more to do with marketing than
engineering.  Other companies have made a big deal over having them and
people have come to think of them as something special.