[Elecraft] Roofing Filter Usage

[Wes Stewart]

Unfortunately, they do.  Personally I dislike the term.

For example:

A "A narrow roofing filter -- compatible with the communications bandwidth 

required -- will protect "downstream" stages. The K3's 

shift/width/hicut/locut controls automatically select and properly 

position the optimal roofing filter. You'll see the FL1-FL5 icons 

selected as you rotate these controls."


http://elecraft.365791.n2.nabble.com/Re-roofing-filters-when-to-use-them-td446665.html#a446666

--- On Thu, 10/28/10, Ron D'Eau Claire <ron at cobi.biz> wrote:

That's why the Elecraft doesn't call the first I.F. crystal filters "roofing
filters". Unlike some receivers, the first I.F. crystal filters in the K3
are there for selectivity to isolate the desired signal. That is further
enhanced in the second conversion with the variable DSP filter, but the
crystal first I.F. filters are a key part of the selectivity equation.