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Re: [TowerTalk] shunt feeding @ N4ZR

To: towertalk@contesting.com
Subject: Re: [TowerTalk] shunt feeding @ N4ZR
From: kd4e <kd4e@verizon.net>
Reply-to: kd4e@verizon.net
Date: Wed, 16 Nov 2005 13:59:39 +0000
List-post: <mailto:towertalk@contesting.com>
I have a really big coil on an 18" x 4" phenolic
tube with several .01 2500 WVDC caps that I believe
had been used for some sort of tower shunt feed.

It is marked part number 994-3936-001

The wire is coated with something white and appears
to be enameled and may be #12 or so.  The wire turns
appear to be several layers.

Ever seen such a beast?

> Did you ever try an L network?
> First iteration of my shunt feed was C at the base in series. Tuned 
> for minimum SWR and then cut top loading to get SWR down further.
> Then, I had an "ah-ha" moment. Why not use a step-up L network:
> series C and parallel L at the antenna side?
> I was able to tune out both reactances this way w/o having to cut top loading.
> Makes a lot of sense to me.
> 73, Craig Clark, K1QX


-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Thanks! & 73, doc kd4e
Echoes of Eden Blog: http://bibleseven.com/blog1/blog.html


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_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

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