larryjspammenot@teleport.com wrote:
> 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...
>
If you can find a photo you can build one. Dimensions would help, but
they are very simple and straight forward. Then all you need is some
pipe, steel plate, and some one who can weld. A certified welder should
be able to build one from the photo and maybe a bit of an explanation.
73
Roger (K8RI)
> 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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