[TowerTalk] Wire Antenna Supports

[W7TMT - Patrick]

My single tower contest station is based on a 38' sailboat. I use a pair of Jackite's largest poles to support an inductively shortened 40/15 M dipole and another pair for a 20/15 M dipole. I need to shorten the 40M because while tied to the dock I don't have enough room due to sailboats two docks away on either side of me. If I'm out at anchor then no problem.

The 40M is built using hand-wound air inductors using the dimensional and coil data from K7MEM's web site (http://www.k7mem.com/). The 20/10M combo is a Skeleton Sleeve by KL0S found in several ARRL publications.

I also use Jackite's 31' version to support the top end of the 160/80M vertical. It is affixed to a sliding carrier that attaches to the main sail track of the boats 45' mast.

They make several that they call their Platinum - Flex Tip series that have thicker tubing walls and tips. Unfortunately the longest is only 27'.

All have reinforced butt/bottom end sections. Longest they offer is 31' but they meet my needs. All are excellent quality in my opinion. The antennas go up on Fridays and down on Mondays for contests and the poles are great for my use.

73,

Patrick. W7TMT

-----Original Message-----
From: TowerTalk <towertalk-bounces at contesting.com> On Behalf Of Jim Brown
Sent: Wednesday, February 17, 2021 01:41
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Wire Antenna Supports

On 2/16/2021 9:08 PM, W7TMT - Patrick wrote:
> he flimsy masts have their purpose. I have several from Jackite (https://www.jackite.com/) which I've found to much better quality than the Ham suppliers offer.

Yes. Slide 12 of http://k9yc.com/7QP.pdf shows two Jackite poles mounted to a plate at the top of the pneumatic mast on W6GJB's contesting trailer, supporting wires that form a 40M dipole. The next slide shows how we use surplus modular military surplus mast sections to for a tower. The legs are two 4-ft sections, which gets the tripod high enough that mast sections can be added and pushed up to extend it. It's no trick to get it up 25-30 ft

Later slides show an 80M inverted V rigged about 3 ft below the 40M dipole.

W6GJB found a vendor selling the tripod fittings at Dayton some years ago. This concept is something that K7JA showed in a talk about Field Day ideas, I think at Visalia.

73, Jim K9YC


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