The price and labor of using insulators, wire rope clips, thimbles, and
or preforms, far outweighs the cost of Philistran.
Philistran is much cheaper.
73, Jim W7RY
Thanks, 73, Jim W7RY
On 9/19/2022 12:24 PM, Doug Ronald wrote:
My commercial 80 foot tower with a log periodic on a mast 20 feet above the
tower top has sections of steel wire rope spaced 8', 10', 10', 10', then 70' to
the ground turnbuckles. The antenna itself is specified from 3 through 30 MHz.
I have plenty of the insulators left over if anyone wants some, just $2 each...
-W6DSR
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of KD7JYK
DM09
Sent: Saturday, September 17, 2022 22:49
To: TowerTalk
Subject: Re: [TowerTalk] Feeding Guys was Loading Guy Wires
Phillystran turned that into a much better antenna. I suspect that
making sections of guy resonant on one of the bands could have some
unexpected effects on other antennas on the tower. Or, it might work fine.
I'd have to dig out some old books, but didn't the ARRL Handbook have a
chart of all metallic guy lengths to avoid to prevent interactions, and
resonance?
Like the image on the left here:
https://2.bp.blogspot.com/-lOK9wj3pL30/WQvMHmLNnHI/AAAAAAAACj8/fKDc1jzvZjAayfvoO7x5P-tFkb7FhsRkACLcB/s1600/arrl_vs_n2ic_guy_interactions_vs_length.png
It's been nearly thirty years since I've referenced it, I use synthetic
materials now.
Kurt
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|
