Jerry,
Take a look at the tradeoff analysis I have on my Website,
specifically, the break-up insulator, Phillistran, and fiberglass rod
implementations.
I chose the fiberglass rod implementation in part so I could add wire
antennas without
worrying about the interference problems. www.erols.com/n3rr Click on
"Guying
Subsystem" in the System Design table.
Also, see the ARRL Handbook for the lengths into which you need to breakup
the guy wires
depending on which bands you intend to use on that tower. This will answer
one of your questions.
Bill, N3RR
----- Original Message -----
From: Jerry W5KP <w5kp@swbell.net>
To: <towertalk@contesting.com>
Sent: Sunday, June 03, 2001 6:46 PM
Subject: [TowerTalk] Breaking up guy wires for nonresonance
> Latest in my series of questions, which you guys have been extremely
helpful
> in answering:
>
> Is there any reason to go to the trouble of putting a "stub" of guy wire
at
> the top with an insulator on it, and then proceeding to break up the
> remainder of the guy, or is that a waste of insulators, preforms, and
time?
> I seem to recall if one end of the guy is grounded (attached to the tower)
> then you can go down the full 14' or 27' or whatever breakup distance
you've
> chosen before you put in the first insulator. Would be interested in
hearing
> sage advice/experiences on this subject. Also, and as an alternative, it
> seems a shame to break up a perfectly good antenna (the guy wires). Wonder
> if there's a way to utilize the guys as a built-in 75M inverted V without
> ruining the tribander's pattern, or the future 40M beam pattern? My C3XLD
> will be up at about 86' (about 12'-13' above the top of the 45G, which
will
> be 74' at the flat top), with plans to later add a 2el 40 just above the
> thrust bearing. Any trick antennas using the guy wires would end up VERY
> close to the 40M beam.
>
> Tks,
> Jerry W5KP
>
>
> List Sponsor: Are you thinking about installing a tower this summer? Call
us
> for information on our fabulous Trylon Titan self-supporting towers - up
to
> 96-feet for less than $2000! at 888-833-3104 <A
HREF="http://www.ChampionRadio.com";>
> www.ChampionRadio.com</A>
>
> -----
> FAQ on WWW: http://www.contesting.com/FAQ/towertalk
> Submissions: towertalk@contesting.com
> Administrative requests: towertalk-REQUEST@contesting.com
> Problems: owner-towertalk@contesting.com
>
>
List Sponsor: Are you thinking about installing a tower this summer? Call us
for information on our fabulous Trylon Titan self-supporting towers - up to
96-feet for less than $2000! at 888-833-3104 <A
HREF="http://www.ChampionRadio.com";>
www.ChampionRadio.com</A>
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
|