[TowerTalk] Narrow Band Filters

[Keith Dutson]

Our club (NARS) built filters like this several years ago for Field Day.
They are all-in-one with a switch to move from 10-15-20-40-80.  I think the
parts cost about $100 per unit.  If you are interested I will try to hook
you up with the builder.

Keith

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Jim Brown
Sent: Saturday, July 03, 2004 10:27 PM
To: Tower Talk List
Subject: [TowerTalk] Narrow Band Filters

I'm thinking about building some narrow band filters (as opposed to a
bandpass filter that covers an entire band) for use on Field Day. The object
is to minimize crosstalk between CW and sideband stations on the same band.
Has anyone tried this?  Is it practical to get enough Q to pick up enough
rejection to make it worth the trouble?  Certainly 80/75 would be the most
practical, since it is the greatest percentage bandwidth. Is anyone making a
commercial product?

Jim K9YC


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