[TowerTalk] Terminating Phillystran to EHS

john at kk9a.com john at kk9a.com
Sun Feb 7 18:56:25 EST 2021


I have had no issues using back to back thimbles, even in a very corrosive
environment.

>From Bill K4XS
Date:	Fri, 5 Feb 2021

Still in the planning stages for the new station.
In the past terminating the Phillystran from the tower to the EHS stub down
at 
ground level was quite easy.  The old style potting ends terminated into a
sort 
of clevis and all one had to do was put a thimble i inside the PLP EHS grip
end 
to run the EHS down to the ground.
The new style isn't quite as easy.  I've used 502 insulators at the
termination 
point when I got a bunch at $1 each, which really worked well.  I've heard
some 
guys  simply hook two thimbles together with the PLP grips inside for the 
connection.  It seems this method would eventually fail due to the wearing
away 
from vibration on the galvanizing and rust would start corroding the 
unprotected stell thimbles.
Others have suggested using a clevis at the point, fastening the Philly to
the 
curved end and the EHS to the uncurved side.  This to me seems like a better

solution but the 136 Rohn tower will be using 1/4 inch EHS so the cost of
the 
clevises runs some bucks when the suggested size needed is 5/8 inch.   By
the 
way the tower will be 1/2 mile from the ocean so corrosion could be an
issue.
The ideal solution would be to find 12 502 insulators at a good price.
One other thing...I picked up some used new style guy bracket assemblies but

they didn't have the elongated "donuts" that attaches to the bracket
assembly.  
I have the same issue with the spacer washers...need some too.  
Any thought on the connecting issue?  Any of the "donuts" or spacers out
there?
Bill K4XS/V31XX



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