- N9LB [mailto:lloydb...@charter.net]
Sent: Monday, January 13, 2014 5:15 PM
To: Grant Saviers;topband@contesting.com
Subject: RE: Topband: Ends for older Phillystran
Hi Grant!
I worked at WDAE Radio in Tampa, FL back in the 80's and 90's. The engineer
before me decided to try the new technology
I have been hesitant to talk about this, for fear of incurring the wrath
of the purists, but since Lloyd went first...
I obtained a quantity of new-old-stock of the old 15000 pound
Phillystran a few years ago. I had the same issue - the ends. It dawned
on me that in my application, the
On 01/13/2014 04:15 PM, Lloyd Berg - N9LB wrote:
Hi Grant!
I worked at WDAE Radio in Tampa, FL back in the 80's and 90's. The
engineer before me decided to try the new technology Philly-strand guy
lines on the AM directional towers because they had constant problems
with the original
:23 AM
To: topband@contesting.com
Subject: Re: Topband: Ends for older Phillystran
On 01/13/2014 04:15 PM, Lloyd Berg - N9LB wrote:
Hi Grant!
I worked at WDAE Radio in Tampa, FL back in the 80's and 90's. The
engineer before me decided to try the new technology Philly-strand guy
lines
I would never design and especially never test for the maximum steady
working load at a wind speed. The shock load of a bounce can strip the ends.
I had a friend who lost a tower from a straight line wind in a normal
thunderstorm because the outer layer stripped off. He used three saddle
The bar idea would probably significantly reduce the allowable tension on the
cable, similar to what knotting does, due to the force at each bite point
weakening the cable. I suppose if the cable was sufficiently oversized this
wouldn't pose a problem, but I'd certainly expect such a clamping
We sailors would wrap a line twice around the eye and then leave a longer tail
and clamp that with some space between each clamp. The increased friction of 2
wraps around an eye/block/winch substantially reduces the pull on a knot,
cleats or (in this case) clamps. It could be that the
Thanks to all who provided info and suggestions.
I plan to run some tests, starting with a modification to my 20T H
frame press so I can tension test specimens up to 10k lbs or so and
measure force with a simple Dillon mechanical 5k# force gauge I have. A
lever arm will give me 2x and maybe
gran...@pacbell.net
To: Tom W8JI w...@w8ji.com, topband@contesting.com
Sent: Tuesday, January 14, 2014 5:31:06 PM
Subject: Re: Topband: Ends for older Phillystran
Thanks to all who provided info and suggestions.
I plan to run some tests, starting with a modification to my 20T H
frame press so
The bar idea would probably significantly reduce the allowable tension on
the cable, similar to what knotting does, due to the force at each bite
point weakening the cable. I suppose if the cable was sufficiently
oversized this wouldn't pose a problem, but I'd certainly expect such a
clamping
As a very crude analogy what you want to be able to do is use a steel cable
from the anchor through the middle of something like an automobile wheel, Then
the Phillystran wants to take a couple of lazy turns around the rim of the
wheel and then get clamped to itself. While there are probably
of the tubing.
73
Frank
W3LPL
- Original Message -
From: Ashton Lee ashton.r@hotmail.com
To: Tom W8JI w...@w8ji.com
Cc: n...@arrl.net, Bill Wichers bi...@waveform.net, Group Topband
topband@contesting.com
Sent: Tuesday, January 14, 2014 7:11:06 PM
Subject: Re: Topband: Ends
I'm actually a little surprised a dead end / preform isn't supposed
to be used with the straight-strand version of the cable.
This discussion really belongs on TowerTalk, but
If the straight-strand cable is bent around something, be it
an insulator, guy grips, woven in and out of
Hi Grant!
I worked at WDAE Radio in Tampa, FL back in the 80's and 90's. The engineer
before me decided to try the new technology Philly-strand guy lines on the
AM directional towers because they had constant problems with the original
segmented steel guy wires/egg insulators constantly arcing
and UHF antennas.
73
Lloyd - N9LB
-Original Message-
From: Lloyd Berg - N9LB [mailto:lloydb...@charter.net]
Sent: Monday, January 13, 2014 5:15 PM
To: Grant Saviers; topband@contesting.com
Subject: RE: Topband: Ends for older Phillystran
Hi Grant!
I worked at WDAE Radio in Tampa, FL back
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