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Re: [TowerTalk] Inverted L questions

To: "Nick Pair" <>, <>,"Peter Dougherty" <>
Subject: Re: [TowerTalk] Inverted L questions
From: "Chet Moore" <>
Date: Thu, 24 Aug 2006 21:55:33 -0400
List-post: <>
Since you don't climb, Forget the pulley all together.  It is not a matter 
of IF but WHEN the pulley  will rust or fail .  A marine pulley may last 8 - 
10 years but it will eventually rust and fail

Just have the utility guys attach a few feet of 3/16 or larger EHS guy wire 
thru one end of a large johnny ball insulator  around the tree trunk  itself 
or a large branch at the top. Make it a large loop so the trunk or branch 
can continue to grow.   Fasten the EHS loop together with a couple of  3/16 
inch cable clamps and forget about it.

I think my L is about  150 feet of # 10 stranded insulated electrical wire. 
90 feet vertical and 60 feet horizontal. I put a thimble on one end of the 
wire fastened with two cable clamps.  I tied  about 100 feet of  black 
dacron rope to the thimble. The other end of the rope is fastened to a tree 
in the front yard .

Once the utility guys get the johnny ball mounted,  have them feed the wire 
down thru the johnny ball and down to the ground at  your coil or matching 
device.  Mine runs down to the ground where it  attaches to a vacuum 
variable capacitor  (mounted in a plastic box I got from K-mart) to shorten 
the antenna for best VSWR.

 The wire slides  very easily thru the end of the johnny ball insulator and 
I can raise and lower the L at will and never worry about a pulley 
malfunctioning or rusting.  i got my rope from the wireman.  Just get the 
best quality and largest size rope you can afford that fits easily thru the 
johnny ball.

I use a second johnny ball attached with a couple of feet of EHS guy wire 
at the top of the tower with a continuous loop through the other end of the 
johnny ball  as a haul line from the top of the tower to the ground.  It 
also works nicely  for pulling up a sloper or inverted vee when needed. In 
20 years at this qth I have gone thru 3 marine pulleys.  They always seem to 
fail at the time they are needed most.

 No failures since I used the johnny ball insulator method.  You will likely 
see some wear on the rope after 4 or 5  years.  If you do see some wear, 
just disconnect the inverted L from the matching device,  Tie a rope on the 
feed end of the wire, pull it up the tree until the thimble comes within 
reach at the far end , cut the old rope, tie on another length of rope and 
pull new run up and thru the johnny ball, reattach the antenna to the feed 
point  and you are good for another 5 years or so.

press on regardless


Chet N6ZO

----- Original Message ----- 
From: "Peter Dougherty" <>
To: "Nick Pair" <>; <>
Sent: August 24, 2006 6:22 PM
Subject: Re: [TowerTalk] Inverted L questions

> At 05:57 PM 08/24/2006, Nick Pair wrote:
>>I have one suggestion. Use a continuous loop of UV resistant rope
>>through the pulley. With a pulley at ground level you can use the
>>loop splice point to attach your L or whatever you choose, This way
>>if wire breaks you will have a haul down rope all ready to pull the
>>antenna attachment point back down. Also you can put whatever you
>>choose at ground to take up the tree sway and keep tension on the loop.
>>You didn't mention where the end of the horizontal wire is anchored.
>>This also needs sway protection and might end up a similar
>>arrangement as the main support.
> Looks like the loop idea is the winner. As I mentioned off-list to
> another kind soul who replied, I'm an ex-apartment dweller (small
> city apartments all my adult life) and thus never needed to know
> about such things. I'm trying to visualize how to do this. Any online
> drawings/photos, etc?
> Also, wouldn't a loop of rope get caught up in all the branches
> sticking out of the tree, making it very difficult to raise or lower
> the insulator and the wire it supports?
> As for the far end of the horizontal wire, after the end insulator it
> will connect to 3/16" dacron rope, over a marine pulley in a distant
> tree, and to a weight of some sort (yet to be figured out) to keep
> the whole shee-bang taught.
> Cheers,
> Peter,
> _______________________________________________
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