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Re: [TowerTalk] To guy or not to guy a Wilson WT61 - that is the questio

To: towertalk@contesting.com
Subject: Re: [TowerTalk] To guy or not to guy a Wilson WT61 - that is the question
From: "larryjspammenot@teleport.com" <larryj@teleport.com>
Reply-to: "larryjspammenot@teleport.com" <larryj@teleport.com>
Date: Tue, 14 Jul 2009 19:12:03 -0700 (GMT-07:00)
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Is the Wilson WT-61 the same basic crankup mast as the model MT-61? The model 
number of the Guy Kit for the  MT-61B tower is the "GK-61B". The 3-page manual 
for it suggests four guys spaced 90 degrees, attached to a guy ring at the top 
of the tower Each guy then goes to a 1/3 cu. yd. concrete anchor, with each 
anchor being about 45 feet from the base of the tower. It also says "Do not 
over tighten guy cables. Leave enough slack so tower top can move about 1 ft. 
from vertical. With this guy kit properly installed the tower is capable of 
supporting 20 sq. ft. antenna at 80 mph." 

To me, that sounds like an awfully big load for such a small mast in that much 
wind. But I guess "Do what
the manufacturer says".....

I have a used Wilson MT-61 tower here which is not yet installed, and would 
like to find one of the RB-61B Rotor Base Raising Fixtures for the tower, or 
any kind of base for it. But Wilson hasn't been making towers for some years 
now, so I don't imagine I'll find one anywhere soon...

LJ


-----Original Message-----
>From: Bill Aycock <billaycock@centurytel.net>
>Sent: Jul 14, 2009 4:23 PM
>To: K7LXC@aol.com, towertalk@contesting.com, w7key@mac.com
>Subject: Re: [TowerTalk] To guy or not to guy a Wilson WT61 - that is  
>thequestion
>
>Steve- Please  check the part I  have marked with *** below. I think it is 
>wrong. Correct me if it's  me.
>BILL-w4BSG
>----- Original Message ----- 
>From: <K7LXC@aol.com>
>To: <towertalk@contesting.com>; <w7key@mac.com>
>Sent: Tuesday, July 14, 2009 5:41 PM
>Subject: Re: [TowerTalk] To guy or not to guy a Wilson WT61 - that is 
>thequestion
>
>
>>
>> In a message dated 7/14/2009 12:02:04 P.M. Pacific Daylight Time,
>> towertalk-request@contesting.com writes:
>>
>>>  The now defunct Wilson WT61 foot tower comes with a brochure  saying it
>> can be strengthened to 20sqft wind load in a 50 mph wind  by guying.
>> They show a single bearing being placed on the 3rd, top  section with 4
>> guy cables.  In discussions with hams who had  guide crank up towers
>> collapse, there seems to be a difference of  opinion over whether crank
>> up towers can or should be guyed.   The argument is that when the wind
>> blows, the guys transfer the  pressure down the tower.  If the crank up
>> cable is supporting  the tower, this can place stress on the tower and
>> down she  comes!  The Wilson has a single pin on a spring (mine gone)
>> where a small role may be pulled to place a non-slip pin into the  top
>> of the first of three sections.  A friend said this might  take stress
>> off the cable that cranks and holds the tower,  permitting guying.   I
>> am interested in experience and  opinions.
>>
>>     Around here I recommend following the LXC  Prime Directive to "DO what
>> the manufacturer says." Pretty simple.
>>
>>    This is assuming that the existing cables and  tower are in decent
>> shape of course. My caution would be to just barely  tension the guys. You 
>> don't
>> want to add to the compressive force on the  existing haul cables. You'd 
>> be
>> using the guys more like a tether, just  something to contain the movement
>> of the tower in the wind. This is a  free-standing tower so the lower,
>> unguyed rating allows a small load  without guying it.
>>
>***
>\***
>>    Don't forget that the guys also take some of the  downward force - it's
>> not all going on the tower haul cables.
>>
>***
>***
>>    And yes, crank-up towers can collapse. Just go  easy on everything,
>> over-engineer it somewhat if you can and you should  be fine.
>>
>> Cheers & GL,
>> Steve     K7LXC
>> TOWER TECH
>>
>>
>>
>>
>> **************Can love help you live longer? Find out now.
>> (http://personals.aol.com/articles/2009/02/18/longer-lives-through-relationships/?ncid=emlweu
>> slove00000001)
>> _______________________________________________
>>
>>
>>
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>> 
>
>
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