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Re: [TowerTalk] Dipole center insulator strain releif

Subject: Re: [TowerTalk] Dipole center insulator strain releif
From: K8RI <>
Date: Tue, 24 Apr 2012 02:03:34 -0400
List-post: <">>
On 4/23/2012 6:51 PM, Stan Labinsky Jr. wrote:
> Guys... and ladies too...
> All this talk of looping the coax over some sort of support and the concerns
> about bend radius and the cable weight damaging the cable at the bend,
> etc.causes me to suggest an alternative.
> Has anyone tried to use 1/4" or 3/16" good outdoor UV stable rope (or line
> as you wish to call it) to Whip the cable and hang it from the antenna
> insulator - a good ceramic "dog bone"?
> See

I like the idea of using either 1/4 or 5/16 double braid and (whipping) 
it around the the coax with the rope suspended from the center 
insulator.  I'd still run the coax up through the insulator and loop it 
down through the insulator again so the open end would be pointed down.  
This would allow for a much more gradual bend in the coax, yet help with 
keeping the water out.

I much prefer the poly double braid which has very little stretch over 
the metal grips.
If time and weather permit I may try doing that this afternoon, or 
evening.  I need to let the antenna down to do some pruning anyway.


Roger (K8RI)

> The co-ax would be the rope in the image. The line end labeled "B" would be
> the end used to hang the cable (the antenna end of the co-ax being the "B"
> end of the rope).
> I've used this technique with good success. The cable is held by the
> multiple wraps of the whipping cord, distributing the load on the jacket
> over the many turns, the hanging lead "B" is supported at its root from the
> "A" end of the whipping, and also held in place by the same turns holding
> the cable.
> All in all, a very gently way to handle co-ax.
> And it's soooo simple.
> Stan
> ----- Original Message -----
> From: "K8RI"<>
> To:<>
> Sent: Saturday, April 21, 2012 10:07 PM
> Subject: Re: [TowerTalk] Dipole center insulator strain releif
>> On 4/21/2012 6:17 PM, Dick wrote:
>>> I just got a rope over a tree after 4 years of trying. I need a dipole
>>> center insulator that has strain relief for the coax. To clear the
>>> branches, the coax will be pulling against the center support rope. All
>>> the center insulators I've seen have an SO-239, it doesn't seem like
>>> putting that strain on a PL-259 is a good idea... Do any have a strain
>>> relief??
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