>From owner-towertalk@contesting.com Sun Mar 15 11:50:28 1998
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>From: "Rick Bullon" <kc5ajx@hotmail.com>
>To: towertalk@contesting.com
>Subject: [TowerTalk] Fwd: [CQ-Contest] Tower question long
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>Date: Sun, 15 Mar 1998 19:49:55 GMT
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>I posted this to the wrong reflector so I sent it over here where it
>belongs.
>----------------------------------------------------------------------
>> Hello All
>> I am finally geting ready to put in the base for my first tower
>>project. I have 40 ft of Rohn 25 and plan to add another 30ft to it to
>>make 70ft total height. I want to be able to fold this tower over it
>>came with a BPH25G base plate and a 19ft pole to surport the tower.
>> I feel that the 3/8 bolts on the base plate are to small to fold
this
>>over safely, would the SBH25G be a better choice? or should I build a
>>stronger base plate my self? I contacted Rohn with this question and
>the
>>response I got was "We just build them we don't energineer them"
>inother
>>words they won't say.
>> My next question is about the support pole to hold the tower when I
>>fold it over. THe pole I got with the tower is 19 ft long and about 1
>>1/2" in diameter. I plan to put 2 section of pipe under this the
bottom
>>section will be 3 1/2" in diameter and 5 ft in concrete the middle
>>setion will be 2 7/8" diameter. I plan to overlap them about 6" to a
>>foot so the total pole will be 5 ft in concrete and 35ft above ground
>>will this be big enough pipe and be long enough to fold over the 70 ft
>>tower with a TH6 on top or do I need to go higher or bigger with the
>>pipe? It will only have a load on it when I have to fold the tower
>over.
>> I've been told by a local ham that this "should work" but it would
be
>>best to guy the pole when I fold the tower over, so I plan to have 5
>guy
>>post to guy too, 3 for the tower and 2 for the pole.
>>It should look like this
>>
>>
>>
>> o o
>>
>>
>>
>> o 0<|
>>
>>
>> o o
>>
>> Well I'm no artist on the key board but in the above diagram the
>top
>>and bottom post on the left side are for the pole when I have to fold
>>over the tower over the rest are for the tower it is not drawn to
scale
>>but I will use the recommended 80% of the tower heigth. I beleive it
>>will be 56ft out from the tower. I plan to guy this thing at 20 40 and
>>60 ft ie every other section right or wrong? Can I use the drycron
rope
>>for guys? I hate to try and figure out where to break up the wire guys
>>with insulaters and the Kelvar seems expensive but I could probably
>save
>>up enough to get the Kelvar stuff I think the brand name is
Phillystran
>>isn't it?
>> THe base wil be 4X4X5 ft deep is that big enough?
>> Right now I have the 40ft of Rhonn 25 tower (will add 30ft more) the
>>TH6 beam and a Tailtwister rotor. future plans might include an A3WS
>for
>>the WARC bands not sure if I will try to put a forty meter beam on it
>>probably will be too much antenna on one tower.
>> AS you csn see I have been planing this for a LONG time, several
>years
>>in factand I still have lots of questions. I need suggestions from the
>>wisdom of the group as I don't plan having to redo this project. I
want
>>to do it right the first time.
>> And for Steve ( sorry I can remeber your call if you want to figure
>>the wind for this area I'm in Parker county Texas).
>>73 and Thanks
>>Rick
>>KC5AJX
>>
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>>
>>
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>>
>
>
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