[TowerTalk] Rotator Choice for Larger Yagi

[Keith Dutson]

Jim,

Thanks for the great advice.

I have the OR2800, with controller box, purchased from M2 in 2006.  Bought the 4el 40 meter beam (two driver elements for broad band coverage) at the same time and was told it would work fine with the rotator.  Installation was postponed in 2007 when I had one stent and  triple-bypass open heart surgery.  Both are still in factory wrappings.

As the years have passed, I am now ready to put this up on top of my 150 foot guyed Rohn 45 tower.  It has a Norm's star guy bracket at 140 feet.  But stories of mast slippage have left me without a solution.

Now to plan that installation!  It has to be done before my 75th birthday next January, or I likely will not be able to help on the tower.  Here are some photos of the last time I put the top antenna up (Force 12 C4-XL).
http://www.dutson.net/Ham/AntennaFarm/AntennaParty20050917.html 

73, Keith NM5G

-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of Jim Thomson
Sent: Tuesday, April 26, 2016 8:45 AM
To: towertalk at contesting.com
Subject: [TowerTalk] Rotator Choice for Larger Yagi

Date: Tue, 26 Apr 2016 08:47:56 -0400
From: "john at kk9a.com" <john at kk9a.com>
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Rotator Choice for Larger Yagi


Besides adding a water shield and new clamps to the OR2800, I would recommend a Green Heron controller.  This controller will work well with the pulse reed switch with no special cable requirements.

John KK9A

## toss  in the Nord lock washers, and / or  blue loctite..  to the list, and you
have a winner.   Im 99%  sure you can buy a OR-2800  without the mating 
M2  control box for it.  Then just buy the OR-2800 +  GH box. 

##  a small traffic cone will also work for a water shield, provided you paint /
cover it 1st...so it doesn’t  look silly being bright red /orange.   That water
shield shown on amazon will do the trick, and fit any diam mast you want. 

##  The K7NV  mast clamp is a thing of beauty, he also uses em on his prop pitch
rotors.   Forget the bolts that compress the flanges,  just pinch them with vice grips
and the mast wont budge !  Ok, now add the bolts, tighten em up a bit, then remove the vice grips.  Mast  wont budge...cant slip.  Its a superb design, since it has a LOT of surface area. Not too many of the teeth on the oem m2 clamp actually touch the mast.  And they
wont dig into a CM mast anyway.   On K7NVs  clamp, even with a 2 inch mast, it provides
> 36 sq inches of surface area.  And > 54 sq inches if a 3 inch mast used.


Jim  VE7RF 
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