On 6/2/2012 2:36 PM, Joseph or Ruth Patrick wrote:
> Hey Roger
>
> You have to climb it so I would use 45G.
I have a 100' 45G for the 40 meter yagi.
> That's what I used. Much more robust. I
> don't even like to climb 25G
Neither do I <:-)) but it's only going 50 feet, will be well guyed, and
is also bracketed to the shop. I also had the 25G handy at no cost.
> I will but I don't like to. As far as the base you
> could go either way. I used a short base. This way you have 4' of tower inside
> the concrete base.
Time was when I went that way and even did with the 45G but having seen
a number of towers rust through right at the concrete interface as
neatly as if they had been sawed off, I've become a firm believer in the
pier pin base, or in the case of the 25G I use a 5' "dirt base" with
solid steel legs
> With the plate you have some type of anchors or J bolts holding down a flat
> piece of steel with stubs welded to it for you first section to go over. I
> run a
> Force 12 C-3S with a M2 6 meter beam 10' above that.
> I don't have my Rohn book handy but as I recall 40' of self supporting 45G
> sounds a bit to high.
I think it's 35' but like you I don't have the book handy. It's out in
the shop, although all of it is "on-line".
> I could be wrong you would have to check the book.
> This tower I have has been up 9 years now and no problems. I was very happy
> with
> my decision to use 45G over 25G. If I had thought some more about it I would
> have used 55G. Yeah I know this way over engineered for what you are
> proposing.
> I can say that I am very comfortable standing on 38' of 45G with flat top.
I've gone up and stood on the 45G top plate at 100' and shot a panorama
at different seasons.
Have to remember to turn off the auto white balance when doing that
though. It's guyed at 3 levels with Phillystran and is rock solid even
in 20 to 30 MPH winds.
73
Roger (K8RI)
> This
> is JMHO and you can do this for a lot less money if you want. If you are still
> on active duty then that would also play a part in these decisions. Good Luck.
> Let us know how you make out.
> 73 DE K4XZ Joe Patrick
> God Made Man
> Sam Colt Made Them Equal
>
>
>
>
> ________________________________
> From: Rip R<cw.op.montana@gmail.com>
> To: towertalk@contesting.com
> Sent: Sat, June 2, 2012 9:40:14 AM
> Subject: [TowerTalk] Rohn tower bases
>
> This thread has undoubtedly been covered sometime in the past, but now I am
> doing
> the research to put up a tower and I am looking for ideas and suggestions.
> My last
> tower was a self-supporting 30' unit erected in 1984 while stationed at the
> Marine
> Corps base in Georgia. I only had it up a couple of years before I was
> transferred,
> so it has been a good while. I have been using a Force 12 40XK vertical
> dipole and
> it has been a good antenna for my situation up to now. I am wrestling with
> the decision
> as to whether to spend twice as much for the 45G as the 25G, but that
> decision will
> be made soon.
>
> My question today is whether to use a concrete pad base from Rohn or to use
> the 5' short section that is embedded directly into the concrete pad? At
> this point
> in time I do not plan on going higher than 40' with this tower since I have
> a small
> back yard. It will start out as self-supporting, but may add guys before
> next winter.
> The antenna will be either a small Force 12 yagi tribander, an Opti-beam
> wire yagi,
> or a hex beam (probably in that order of preference).
>
> If figure that once I make a decision about the base, I can move forward
> with
> ordering some of the parts to get this project going. 73s Roger Rippy W7RIP
>
> P.S. Does anyone have any feedback about suppliers of Rohn tower equipment
> such as 3 Star, Dx Engineering or others? Feel free to reply offline. TU
> _______________________________________________
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