Greetings,
As an alternative, can the steel cable be pre-treated with something like
an anti fouling bottom paint (used on boats)?
Regarding the guy wire resonances debate, I would recommend Douglas you go
ahead and put something up as you planed and see how it works. If you run into
an issue it is easy enough to fix afterwards, when you can.
73 Mike K9MK/5
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of J. Hunt
via TowerTalk
Sent: Sunday, December 13, 2015 11:14 AM
To: David Robbins; 'reflector -tower'; Douglas Ruz (CO8DM)
Subject: Re: [TowerTalk] Can´t add egg insulator...
Sorry - I disagree.
Reason, I have a side mounted antenna, whenever it somewhat faces a guy cable,
the SWR goes up and performance goes down.
Using non-resonate guy cables is also mentioned within many ARRL handbooks and
general RF engineering books.
Using galvanized steel cables is important, verses non-galvanized cable.
Future developing corrosion will result in RX noise and TX interference.
Using solid wire is not recommended due eventual fatigue and breakage. A
multiple strand of galvanized cable provides flexibility and corrosion
prevention.
I have replaced many rusted out guy cable sets over the years on other peoples
towers. A rusted cable is a genuine noise generator.
My personal tower utilizes 1/4" and 3/16" EHS galvanized steel cable.
Towers that I install use 1/4" and 3/16" EHS galvanized steel cable and/or
Phillystran.
Thank you,
James
ki5dq
... a veteran tower dog
--------------------------------------------
On Sun, 12/13/15, Douglas Ruz (CO8DM) <co8dm@frcuba.co.cu> wrote:
Subject: Re: [TowerTalk] Can´t add egg insulator...
To: "David Robbins" <k1ttt@arrl.net>, "'reflector -tower'"
<towertalk@contesting.com>
Date: Sunday, December 13, 2015, 10:49 AM
OK,
I understand 100%.
Anyway, if someone here have experiences with solid steel wire...go ahead.
I saw few mast installed with solid steel wire (1/4") here...they don´t use
clamps, they just twist the extra wire over the "live" side of the wire.
73....Douglas, CO8DM
"No creo que haya alguna emoción más intensa para un inventor que ver alguna
de sus creaciones funcionando. Esa emoción hace que uno se olvide de comer,
de dormir, de todo." - Nikola Tesla
----- Original Message -----
From: "David Robbins" <k1ttt@arrl.net>
To: "'Douglas Ruz (CO8DM)'" <co8dm@frcuba.co.cu>; "'reflector -tower'"
<towertalk@contesting.com>
Sent: Sunday, December 13, 2015 11:41 AM
Subject: RE: [TowerTalk] Can´t add egg insulator...
Sorry, it is 1/4" ehs... solid = no insulators.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net:7373
-----Original Message-----
From: Douglas Ruz (CO8DM) [mailto:co8dm@frcuba.co.cu]
Sent: Sunday, December 13, 2015 16:26
To: David Robbins; reflector -tower
Subject: Re: [TowerTalk] Can´t add egg insulator...
Glad to hear your experience David...by the way, 1/4" solid steel wire is
available here...it is cheaper than 1/4" EHS galvanized wire and sometimes
galvanized is not available...David, how do you fix the solid steel
wire???...using clamps or any other technic ???...any tips are welcome.
I have "TONS" of egg insulators, maybe if i "switch" to 1/4" solid steel wire
I can add egg insulators.
I will solve one problem but i will introduce another...corrosion will attack
the solid steel wire faster than galvanized...Imperfect WORLD...hi, hi...
Non conductive materials like Philistran or Dacron are NOT AVAILABLE here.
Thanks,
73....Douglas, CO8DM
"No creo que haya alguna emoción más intensa para un inventor que ver alguna
de sus creaciones funcionando. Esa emoción hace que uno se olvide de comer,
de dormir, de todo." - Nikola Tesla
----- Original Message -----
From: "David Robbins" <k1ttt@arrl.net>
To: "reflector -tower" <towertalk@contesting.com>
Sent: Sunday, December 13, 2015 10:52 AM
Subject: Re: [TowerTalk] Can´t add egg insulator...
> It isn't that important to use non-resonant guys. I have 4 guyed towers
> with solid steel wires and stacks of yagis for 10m through 40m and
> everything works just as it should.
>
> David Robbins K1TTT
> e-mail: mailto:k1ttt@arrl.net
> web: http://wiki.k1ttt.net
> AR-Cluster node: 145.69MHz or telnet://k1ttt.net:7373 > > > >
> -----Original Message----- > From: TowerTalk
> [mailto:towertalk-bounces@contesting.com] On Behalf Of J. Hunt via TowerTalk
> > Sent: Sunday, December 13, 2015 15:33 > To: towertalk@contesting.com;
> Douglas Ruz (CO8DM) > Subject: Re: [TowerTalk] Can´t add egg insulator...
>
> It is VERY important to use non-resonant steel guy cables on your >
> frequency(s) of operation.
> > A resonant guy cable will have adverse radiation patterns during RX and TX.
>
> A good example... my guyed tower was constructed years prior the 60m band
> was introduced.
> My tower is guyed at three levels. Numerous preformed grips and egg
> insulators were used.
>
> I rigged up a 60m dipole antenna. During the tuning process, as I neared the
> resonant frequency, the SWR suddenly sky-rocketed.
> Reason - two of my guy cables were resonant within the 60m band. I scrapped
> the 60m antenna.
>
>
> Thanks n 73,
> James
> ki5dq
>
> --------------------------------------------
> On Sun, 12/13/15, Douglas Ruz (CO8DM) <co8dm@frcuba.co.cu> wrote:
>
> Subject: [TowerTalk] Can´t add egg insulator...
> To: towertalk@contesting.com
> Date: Sunday, December 13, 2015, 8:47 AM > > Hi guys, > > I read about
> resonant guy wires.
>
> Unfortunately i can´t add egg insulator to build non resonant guy wires. I
> don´t have enought clamps or guy grip (preform) to install egg insulators.
>
> Maybe someone know any other solution.
>
> I have been modeling my tower on MMANA and i don´t see any interaction with
> my HD spiderbeam for 10, 15 and 20m.
>
> My guy wires lengths are: 20 ft (the 1st level ) and 30ft (the 2nd > level).
>
> any tips are welcome.
>
> 73....Douglas, CO8DM
>
> "No creo que haya alguna emoción más intensa para un inventor que ver >
> alguna de sus creaciones funcionando. Esa emoción hace que uno se olvide >
> de comer, de dormir, de todo." - Nikola Tesla >
> _______________________________________________
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