[TowerTalk] Fwd: Temporary tower installation

[Roger (K8RI) on TT]

Tilt base is plain out simple to use and to make. Take a picture or 
drawing with an explanation to most any welding shop and they can whip 
one out in minutes.
For a base I prefer TWO metal plates with the bottom section of the 
tower mated to the top plate.  The reason for this is it reduces the 
stress on the two tower legs. The plates can be hinged using matching 
steel tubes, or pipe welded to the plates with the appropriate size 
steel rod used as a hinge pin. The same configuration can be used on the 
opposite side to pin the plate together once the tower is up. Make 'em a 
couple feet square by quarter inch thick. Yes, they will be heavy.

Drill appropriate size holes near the corners to drive hefty rods in as 
anchors.  Drive the rods at angles so a tipping motion won't try to pull 
them out.  Use Phillystran or double braided Dacron rope for guys. It's 
only 40 feet, but good guys add safety for the antenna and anyone who 
might have to climb it.  I've walked up many 40 footers with rotator and 
tribander in place. That I've was me and 4 other guys and the tribanders 
were the size of the C19XR or smaller. 3 and 4 L tribanders were 
relatively easy, but a little weight "up there" can quickly add a lot of 
effort.

I like Wilson's approach, but I'd use a towing strap and one of those 
big jacks that work with the straps.

73

Roger (K8RI)


On 8/17/2016 Wednesday 12:53 AM, Hans Hammarquist via TowerTalk wrote:
>   The tilt bases used during the WRTC was made by Norm’s Fabrication. I have no idea were to find Norm even if I met him after the contest.
>
> Hans - N2JFS
>
>   
>
>   
>
> -----Original Message-----
> From: Ken Fritz <ken.fritz at gmail.com>
> To: john <john at kk9a.com>
> Cc: towertalk <towertalk at contesting.com>
> Sent: Tue, Aug 16, 2016 1:10 pm
> Subject: Re: [TowerTalk] Temporary tower installation
>
> The WRTC falling derrick system looks great - does anyone have a source to
> get that sort of base?  Or plans available for fabrication?
>
> Thanks,
> Ken
> N3WAX
>
> On Tue, Aug 16, 2016 at 12:51 PM, john at kk9a.com <john at kk9a.com> wrote:
>
>> I put an A3 on a 30' temporary tower in Aruba a few times but I would not
>> say that I used the safest method. I would look at the WRTC falling
>> derrick hinge base method. It looked pretty safe and easy once set up. I
>> am sure that there are videos on youtube.
>>
>> John KK9A
>>
>>
>> To:     towertalk at contesting.com
>> Subject:        [TowerTalk] Temporary tower installation
>> From:   Ken Fritz <ken.fritz at gmail.com>
>> Date:   Tue, 16 Aug 2016 11:43:23 -0400
>>
>>
>> Hi all,
>>
>> I'm looking to erect a temporary tower for CQ WW SSB.  I have 40ft of Rohn
>> 25G and an A3S that I'd like to put up.  I've seen a number of ways to do
>> it but I'd like to hear from those who have some experience.  What's the
>> easiest and safest way to do something like this?
>>
>> I've looked into plenty of options so far but I'd like to keep the question
>> open-ended to see what you all think.
>>
>> Thanks!
>> Ken
>> N3WAX
>>
>>
>> _______________________________________________
>>
>>
>>
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>
>


-- 

73

Roger (K8RI)


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