Yeah.
Didn’t mention that I use two transits set up at right angles to two of guys.
Being a bit OCD, this works out fine, as I can get the tower super straight.
Steve
Sent from my iPhone
> On Nov 26, 2020, at 8:49 AM, kdutson@sbcglobal.net wrote:
>
> I can relate to this. My 150 foot Rohn 45 was erected in 1999 by a team of
> friends led by a veteran ham friend tower erector. I chose Phillystran 6700
> pound strength using PLP Big Grip dead ends. As recommended, the Phillystran
> is terminated about 15 feet above ground level to avoid damage from grass
> fires. The last run to the elevated guy poles is 1/4 EHS. A LOOS tension
> gauge was used on the EHS. The guys are attached at 35, 70, 110 and 150 feet.
>
> On the top is a Force-12 C4-XL antenna rotated by a Yaesu 2800. While
> setting up the rotor direction, we noticed a significant amount of twist when
> the antenna was rotated. The veteran recommended a three point guy bracket
> to limit the twist. I bought one from Norm's Fabrication. I hired a
> professional tower climber to install this bracket at 140 feet.
>
> Before the climber arrived, I inspected the tower and found it looked like a
> snake when viewed from the tower base. I adjusted each set of guys so that
> the tower is now straight. I used a plumb bob at 35 feet to adjust the lower
> set of guys prior to setting the rest. I did not use the LOOS gauge, but
> adjusted the turnbuckles using a Crescent wrench to approximate equal force.
> This required a lot of walking to-from each guy post, and back to the base to
> view straightness. This was several years ago. Before each climb, I check
> for straightness. No adjustment has been necessary since the initial setting.
>
> I have three more towers to erect, but not sure if and when this will happen.
> I purchased these towers and about 10,000 feet of Phillystran from a ham
> that had a superstation that was dismantled when he moved out-of-state. They
> are all Rohn 55. They will be installed using experience gained from the
> present tower.
>
> 73, Keith NM5G
>
> -----Original Message-----
> From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of Grant Saviers
> Sent: Wednesday, November 25, 2020 9:29 PM
> To: Tower Talk <TowerTalk@contesting.com>
> Subject: Re: [TowerTalk] Guy tension gauge
>
> The tensions equalize if the tower is sufficiently flexible. Then the tower
> might be pulled out of column at that guy, which is a really great way to
> induce a tower to fail. Tighten each guy to achieve equal tensions WITH the
> tower in column.
>
> Grant KZ1W
>
>> On 11/25/2020 16:39, Steve, NR4M wrote:
>> Hello Wayne,
>>
>> 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.
>>
>> Just everyone be careful.
>>
>> 73 de Steve, NR4M
>>
>> Sent from my iPhone
>>
>>>> On Nov 25, 2020, at 7:03 PM, Wayne Kline <w3ea@hotmail.com> wrote:
>>>
>>> John,
>>>
>>> Having used Phillystran I had either 3/16 , ¼ or 5/16 EHS cable
>>> terminated to the ground anchor/turnbuckle I use a LOOSE gauge
>>> This is not as accurate as a dynamo meter. BUT IMO for amature applications
>>> it fits the bill.
>>> I have never used it on Phillystran directly on the steel tail ends ..
>>>
>>> Wayne ,W3EA
>>> Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for
>>> Windows 10
>>>
>>> From: John Simmons<mailto:jasimmons@pinewooddata.com>
>>> Sent: Wednesday, November 25, 2020 6:23 PM
>>> To: Tower Talk<mailto:towertalk@contesting.com>
>>> Subject: [TowerTalk] Guy tension gauge
>>>
>>> Are there gauges available for Phillystran?
>>>
>>> --
>>> 73,
>>> -de John NI0K
>>> https://www.qrz.com/db/NI0K
>>>
>>>
>>> _______________________________________________
>>>
>>>
>>>
>>> _______________________________________________
>>> TowerTalk mailing list
>>> TowerTalk@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/towertalk
>>>
>>> _______________________________________________
>>>
>>>
>>>
>>> _______________________________________________
>>> TowerTalk mailing list
>>> TowerTalk@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|