Topband: BCB Filter (related to Antenna Analyzer question)

[Ian Wade G3NRW]

From: Mike & Coreen Smith <ve9aa at nbnet.nb.ca>
Date: Tue, 13 Oct 2009   Time: 19:09:36

>Will a simple filter like this be sufficient to allow (for example) an
>AA-200, AIM-4170 or a MFJ-269 to work on 160m
>or is there more to it? http://www.iceradioproducts.com/filtersrf.html#bcb

Mike,

Looking at the response of the 402/402x filter, I really wonder if it 
works as good as it looks. The response appears to be flat down to about 
1.7MHz, then it turns the corner and falls off a cliff. I suspect the 
corner is in actuality much more rounded, and you will lose several dB 
towards the bottom end of top band.

Maybe it's worth homebrewing a filter to notch out the offending BC 
station(s).

-- 
73
Ian, G3NRW