So my towers are up and aluminum going on. The 4 towers are spaced 350 ft apart. Any suggestions on what I can run from tower to tower for wire antenna supports? NY6DX _______________________________
Phillystran! -de John NI0K john nistico wrote on 4/20/2021 8:00 PM: So my towers are up and aluminum going on. The 4 towers are spaced 350 ft apart. Any suggestions on what I can run from tower to to
Thanks John Get Outlook for iOS<https://aka.ms/o0ukef> ________________________________ From: TowerTalk <towertalk-bounces@contesting.com> on behalf of John Simmons <jasimmons@pinewooddata.com> Sent:
I wouldn't use Phillystran if there is any repeated bending such as going over a pulley, although it is not clear what "lanyard" means. Kevlar is fatigue prone unless specifically treated or in a rop
AFAIK, a "lanyard" simply hangs something statically. A "halyard" raises something and typically involves going around 1 or more pulleys. New England Ropes Sta-Set polyester is my favorite for low s
I think Phillystran is priced a bit high to use as a lanyard. On the lower end of price is tarred nylon twine, commonly used for fishing (trotline). I have used a 400 pound test line obtained from A
Author: Jon Zaimes via TowerTalk <towertalk@contesting.com>
Date: Wed, 21 Apr 2021 06:25:13 -0400
John, I use 3/16" double braided polyester to support the four T-shaped parasitic elements in my 160m K3LR array. The longest span is about 250 feet, plus 100 feet+ running to the ground so these can
No pulleys it will span 350 and attached to the top of the tower most likely with turnbuckles. Get Outlook for iOS<https://aka.ms/o0ukef> ________________________________ From: Jon Zaimes <jz73@veriz
Rather than be tempted to use high enough tension where turnbuckles are needed, let it sag a little, give up a few feet of height - your tower guy systems will appreciate it. -Steve K8LX John, I use
Good point Steve. The longest wire for 160 meters is about 140 ft the towers are 150 Get Outlook for iOS<https://aka.ms/o0ukef> ________________________________ From: TowerTalk <towertalk-bounces@con
Amen to that - I can't remember the actual trig formula, but I do know that as sag approaches zero, tension on the caternary approaches infinite, rapidly. Thanks to K1TTT for that insight. 73, Pete
I use Harbor Freight Truck Rope in the 5/8" flavor, from pulleys at either end of the 250' span between towers. Starting at about 75' from the main tower, I use 3/8" dacron to ebay pulleys every 10',
Re Sta-Set, it seems to have good UV resistance in marine use. Halyards etc. do wear at pulleys so that might be a few to dozen years or more before being flipped or replaced. I was going to mention
I am not a mechanical engineer but I am guessing that if he uses Phillystran and allows for perhaps 10' of sag there is not a lot of tension on the cable. Rope may be worse if it gets wet and heavier
I've got a lot of their 7/16-in rope supporting wires between redwoods. Purchased from HRO. 73, Jim K9YC _______________________________________________ ______________________________________________
You'll always have sag... less sag, with more tension... Here is a calculator, with both ends at the same elevation. Using 1/2" Phillystran for a 350' span, you have something like 23' of sag with a
On 4/21/2021 7:35 AM, Ron Hill wrote: I use Harbor Freight Truck Rope in the 5/8" flavor, from pulleys at either end of the 250' span between towers. Starting at about 75' from the main tower, I use
Check mauriprosailing.com for polyester double braid or polyester over dyneema. I think they would gladly sell whatever length you want up to a full spool- usually 600ft. The order form accepted that
WA6NMF warned me about this when I moved to W6 in 2006. 73, Jim K9YC _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@c
Lots of color and tracer choices as well. I've bought blocks from them, no rope. It's kind of like buying coax - sure you *can* buy coax at Home Depot... But you're better off going to a cable dealer