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Re: [TowerTalk] Guy tension gauge

To: Steve <lists@oakcom.org>
Subject: Re: [TowerTalk] Guy tension gauge
From: "Steve, NR4M" <steve@nr4m.com>
Date: Wed, 25 Nov 2020 22:20:42 -0500
List-post: <mailto:towertalk@contesting.com>
Those penn tech gauges are nice. Always looking for one used. 

Steve

Sent from my iPhone

> On Nov 25, 2020, at 9:59 PM, Steve <lists@oakcom.org> wrote:
> 
> On 11/25/2020 7:39 PM, Steve, NR4M wrote:
> 
>> What is the Loos gauge telling you?
>> Those things were intended for the type of cable used on boat rigging. They 
>> probably do that just fine.
>> The finer stranding of the boat cable deflects more easily than the EHS 
>> cable would, so I think all bets are off as far as accuracy goes.
>> The best you can do with a Loos gauge, and it probably does it just fine, is 
>> show you if the EHS tension is equal.
>> But, if I recall my physics correctly, -if- all guys at any given level are 
>> identical ( same distance to each guy anchor, etc) then the tension on any 
>> one will be the same as the other two.
>> I have a nice, brand new tension dynamometer and I have been intending for 
>> several years on taking pieces of 3/16, 1/4, 5/16 and 3/8 inch EHS, putting 
>> them in series with each other and the dynamometer between BIG trees, and 
>> try and calibrate a large Loos gauge.
> 
> Mostly correct. If you consider the tower as a flexible column, the three 
> guys at any level will be fairly equal in tension. Anyone who installs taller 
> R45 & R55 towers knows that intuitively. If it were a rigid column, not so 
> much. It so happens though that even big towers when engineered for maximum 
> efficiency turn out to be fairly flexible because the guy levels are spaced 
> way further apart.
> 
> When I mentioned deflection gauge I was thinking of something like a 
> Penn-Tech, which comes with a table letting you measure either EHS or bridge 
> strand *fairly* accurately.
> 
> -Steve K8LX
> 
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