Skip the 3 element 40; get a 2 element shorty forty, guy real well and you
should get away with it. Always have EHS at the bottom of any Philly. Saul
K2XA
---- "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net> wrote:
> Jwpjj@aol.com wrote:
> > I am getting ready to install 90' of Rohn 25, base section is all
> > done,concrete etc and so are the guying stancheons that are set in concrete
> > as well. I
> > have the first 10' up and hopefully in a few weeks or so will be ready for
> > the rest of the installation. My question is what is preferred, steel
> > guying
> > cable or Phillystran cable. One of my concerns ( maybe it should not be) if
> > I
> >
>
> My preference is the Phillystran. Although it has a tiny bit of stretch
> the catenary with EHS will allow a lot of movement. ROHN recommends
> 3/16" EHS . 1/4" would add a lot of weight. Tensioned properly
> resonance is not normally a problem with EHS. Catenary is very shallow
> using Phillystran.
> > use steel guying installation, should I be concerned about resonance based
> > on
> > the lengths of guying cable. The tower will have a 4 el steppir at approx
> > 98',
> > below that there will be a 3 element 40 meter monobander, prosistel
> > rotator
> >
> However, as others have already said, this is a *lot* of load for a
> 25G.P/N 25G70D090 gives guying points at 28', 57' and 85' using 3/16"
> EHS anchored 72' out from the base. In CT you have both gusty winds and
> ice. Were it me, I'd not tackle a load like this with a tower smaller
> than 45G.
>
> 73
>
> Roger (K8RI)
> > and fed with LMR400. Will I need to break up the guys? It seems like it
> > would
> > be a lot of work if I had too or should I just go for the Phillystran and
> > don't be concerned. This is my first guyed tower as I have always have
> > had
> > crank ups. I have seen a lot of pictures that have been on this forum and
> > was
> > wondering what most everyone else uses for guying their towers. The guying
> >
> > lengths will be as per Rohn specs, 80% of total height to calculate guys
> > lengths.
> >
> > John, ND1X
> >
> >
> >
> >
> > **************Vote for your city's best dining and nightlife. City's Best
> > 2008. (http://citysbest.aol.com?ncid=aolacg00050000000102)
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> >
> >
> >
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> >
>
>
> --
> Roger (K8RI - ARRL Life Member)
> www.rogerhalstead.com
> N833R (World's oldest Debonair)
>
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