I will see if I can find it again - I may well have done him an injustice to
quote without the reference.
I would however respectfully disagree with your assessment -
about being dead wrong. The point is that if guys are cut to be
non-resonant and they are by nature further away from the antennas
and in the wrong plane than the amount of coupling is insignificant.
If this were not true than antennas like the C31XR and many others
would not work - they are no different! Metal IN PLANE cut to be
non-resonant.
Granted the antennas are designed around the existing elements but again
they
are in the plane and they are very close.
g.
besides: working with EHS to make it work is still, in my opinion, better
than
designing around a material that can stretch and potentially put the tower
at risk.
I am sure you have seen K7NV's analysis - it was, at least to me, an eye
opener.
Finally: as Steve LXC likes to say "do what the manufacturer says"
.... unless I missed it they recommend STEEL!
----- Original Message -----
From: "Tom Rauch" <w8ji@contesting.com>
To: "StellarCAT" <RXDesign@ssvecnet.com>; "tower" <towertalk@contesting.com>
Sent: Wednesday, September 21, 2005 9:30 AM
Subject: Re: [TowerTalk] replacement guys (was ...and C31XR)
> As for interaction - there is a treatise on the net by a
gentlemen that I have forgotten his name -
> very well done overall on tower installations... he said
in essence: for a dipole to add gain one
> has to CAREFULLY place another length of conducting
material in the plane, at the right distance,
> and have the right length to JUST have a little gain...
the guy wires are not in the plane in most cases,
> can be cut to be non-resonant, and for the most part are
a long distance away.
It would be interesting to read the "article", because it's
dead wrong if that is what it actually says.
The issue isn't adding controlled gain. The issue is pattern
distortion.
73 Tom
_______________________________________________
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.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|