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[TowerTalk] 3M Scotch 2200 Vinyl Mastic Pads

To: <towertalk@contesting.com>
Subject: [TowerTalk] 3M Scotch 2200 Vinyl Mastic Pads
From: dcoolica@planet.eon.net (Denis Coolican)
Date: Tue, 11 Sep 2001 07:50:01 -0500
Eugene, I think your approach to making connection with the cable is
just fine.
I wouldn't think you would have to get to exotic with the pads and all.
I usually
do is  just coat  the connection over the coax with roofing cement which
makes it
good seal and is waterproof.

Regards

Denis VE6AQ

EUGENE SMAR wrote:

> TT:
>
>      While shopping at the electrical supplier for hardware to mount the
> Hoffman enclosure to my tower base, I found the above material that I'm
> considering using on my coax  shield ground connections at the tower.  The
> material is sticky pads of black insulating material with a vinyl backing,
> and they measure 3.25 X 4.5 X 0.125 inches.  The box of ten cost me $18.70
> (which I didn't realize until I looked it up for this post.  Sheesh!)
>
>      What I'm thinking is cutting away about an inch and a half of jacket
> from the coax where I want to apply the ground connection.  I'll fold a
> piece of copper flashing around the coax braid so a flag of copper about an
> inch wide is left on one side of the coax.  I'll fix the flashing in place
> by bolting a two-hole brass terminal through two pairs of aligned,
> pre-drilled holes in the flashing flag.   The terminal will keep the
> flashing in place and enable me to connect a #6 ground wire to it (and the
> shield) and to the tower.
>
>      I'll next fold a mastic pad over the connection, molding it to the
> contours of the terminal and bolts.  Then I'll apply tape and Liquid Tape as
> instructed elsewhere and elsewhen in the TT archives.   The advantage of the
> pads over tape is it might be easier to cover the irregularly-shaped
> connection with the pads than with tape.
>
>      I'll have to experiment with the flashing size, and probably pre-bend
> the pieces around a dowel before I take them up the Tower with me.  Might
> use alcohol wipes on the flashing's interior surface before I attach it to
> the braid.  Might also need only half a pad per connection.  I think I'll
> also build up a test piece of coax with the ground connection in place and
> hang it somewhere on the tower for a year, just to see how clean it is after
> I open it up.  I'll seal the ends of the test piece, of course.
>
>      Certainly is cheaper than commercial ground connectors.  Flame shields
> in place - fire away.
>
> 73 de
> Gene Smar  AD3F
>
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>
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List Sponsored by AN Wireless:  AN Wireless handles Rohn tower systems,
Trylon Titan towers, coax, hardline and more. Also check out our self
supporting towers up to 100 feet for under $1500!!  http://www.anwireless.com

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