[Elecraft] Question - for Educational Purposes

[Vic K2VCO]

KB5DXY wrote:

> How about a discussion of what these filters actually do for you and why you
> might want to use each one. 

Here is the most practical possible explanation:

1) We are talking about the narrowest filters, 50-100 Hz. So this is 
only applicable to CW.

2) The IIR filters have slightly steeper skirts, but ring more. The FIR 
filters ring less but are not quite as sharp.

3) Find a very weak CW signal that you can barely copy and see which 
makes it easier to copy.

Note: it will depend on band conditions; different types of QRN may make 
one type of filter better than another.
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco