[Towertalk] Rohn rotator plate for 25G

[Jim White, K4OJ]

THIS IS ALL OLD STUFF COVERED ON TT BEFORE


....another option mentioned on tower talk that has been used in the 
past at my stations was to mount that plate upside down at the top of 
the next to the last (top) section of tower.

This is very easy to do when you are stacking sections...

By mounting it with the ears up, the flat plate will actually rest 
against the horizontals.  As I remember  there still was something thing 
had to be "cut in" but the beauty of this location was that the weight 
of the rotor/mast/antenna was NOT just support by the u-bolts in the 
corners.

 There are "short top sections" available on  the market as well, by 
using a middle thrust bearing as well you get the "ideal" mast location 
(in my opinion) - coupled with mounting the top guy sets  down from the 
top of the tower near the rotor you create a tower which has a good 
place to work on the antennas....even better if you have a flt top plate 
which allow you to use the mast for stacking easily - you can stand on 
the top plate.

With my size 13's I was never a fan of 25G but 45G and 55G with the 
above sheme work gud.

Sure is cool here, cannot wait for the nice weather we get in April when 
we go mobile in the Florida QSO Party - by the way that's the 26th and 
27th this year.

73,

Jim, K4OJ


Jon Ogden wrote:

>I discovered this myself.  Here's what I learned.
>
>The rotor plate is specifically designed to be installed in the bottom part
>of a Rohn top section.  The bottom part of the top section lacks a couple of
>the "z" truss structural elements.  You can then get the rotor plate mounted
>in there.  That is where you should mount the rotor.  Any other place and it
>will not fit.
>
>73,
>
>Jon
>NA9D
>
>on 1/13/03 7:54 PM, K1JB at k1jb@maine.rr.com wrote:
>
>  
>
>>I'm trying to put a triangular shaped Rohn rotator plate (accessory shelf
>>AS25G) near the middle of a standard Rohn 25G section.  But no matter how I
>>twist and turn it, I can't get it to fit anywhere within the diagonal
>>braces.
>>
>>Does anyone know of a way to do it without cutting the tower braces?
>>
>>The exact position is not critical; I would just prefer not to have to put
>>it at the bottom of the section and have less mast available above the
>>thrust bearing at the top.
>>
>>Tnx es 73,
>>Joe, K1JB
>>
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>>    
>>
>
>-------------------------------------
>Jon Ogden
>NA9D (ex: KE9NA)
>
>Citizen of the People's Democratic Republik of Illinois
>
>Life Member: ARRL, NRA
>Member:  AMSAT, DXCC
>
>http://www.qsl.net/na9d
>
>"A life lived in fear is a life half lived."
>
>
>_______________________________________________
>AN Wireless Self Supporting Towers at discounted prices, 
>See http://www.mscomputer.com 
>
>Wireless Weather Stations now $349.95. Call Toll Free, 
>888-333-9041 for additional information.
>_______________________________________________
>Towertalk mailing list
>Towertalk@contesting.com
>http://lists.contesting.com/mailman/listinfo/towertalk
>
>  
>