[TowerTalk] Dipole center insulator strain releif

[Bob K6UJ]

Jim,

I've seen the ones you mentioned with the cable loop, they look like they should work well for suspending the coax.
I use these sliding grip clamps on my tower for supporting the coax lines hanging from the upper support arm,
another variation of grip clamping.
http://www.bptfittings.com/Catalog/CatalogFamily.aspx?CategoryId=30&FamilyId=167

Bob
K6UJ




On Apr 23, 2012, at 4:04 PM, Jim Lux wrote:

> On 4/23/12 3:51 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 http://en.wikipedia.org/wiki/Common_whipping
>> 
>> 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.
>> 
> 
> The same basic idea as, say, Kellems grips.  the clamping/grabbing force 
> is distributed over a length of the jacket.
> 
> 
> http://www.grainger.com/Grainger/HUBBELL-WIRING-DEVICEKELLEMS-Strain-Relief-6C091?Pid=search
> 
> that one runs into a conduit fitting, but I've seen ones that terminate 
> in a steel cable loop, which could attach to that center insulator.
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