Just a word of something that "has" worked for me in the past.........we
are dealing with wire "lengths" that interfere with "some" freqs
right?........It helped me in the past when I simply "added" a length of wire
"electrically" to the bottom of the guy wires.........it was NOT added to
lengthen the actual guy wire and have to "re-do" guy anchors etc......it was
simply attatched physically to add electrical length to the guy wire, and
allowed to hang or droop......you may also use insulated wire and droop it or
"coil" it up to change the electrical length of your interfering wire <wires>
. Hope this helps........
73 Bob 4t
========Original Message========
Subj: Re: [Towertalk] Guy wire resonance. Break it up or use stubs?
To: <towertalk@contesting.com>
Date: 6/24/2002 10:52:28 PM Eastern Standard Time
From: <A HREF="mailto:k2av@contesting.com";>k2av@contesting.com</A>
To: <A HREF="mailto:tongaloa@alltel.net";>tongaloa@alltel.net</A>, <A
HREF="mailto:towertalk@contesting.com";>towertalk@contesting.com</A>
Sent from the Internet (Details)
I've spent as much time as anyone worrying over guy wire resonances.
The ARRL anti-resonant sections are a myth. They don't work because
the guy wires are in the antenna near field and currents are NOT
evenly induced across their length by a distant (far field) point
source, apparently an unintended assumption in the ARRL figures. They
further don't work due to capacitive feed across breakup insulators
that changes the length in a non-predicted way similar to end-effect
on dipoles.
I'm not sure what construct you mean by transmission line sections.
If you can afford it (do the comparative cost math on insulators,
grips, etc) get Phillystran. Or maybe do the first 33 feet of every
guy off the tower in Phillystran.
Sleep at night.
73, Guy.
----- Original Message -----
From: "tongaloa" <tongaloa@alltel.net>
To: <towertalk@contesting.com>
Sent: Monday, June 24, 2002 2:13 PM
Subject: [Towertalk] Guy wire resonance. Break it up or use stubs?
> What's the word these days on guy wires.
> Break 'em up with insulators or make up transmission line sections
to get
> away from
> resonance near operating freqs?
> Thanks,
> -bob
>
>
> _______________________________________________
> Towertalk mailing list
> Towertalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
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