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Re: [TowerTalk] marb550 diagrams

To: "JC Smith" <>, <>,<>
Subject: Re: [TowerTalk] marb550 diagrams
From: "Richard M. Gillingham" <>
Date: Thu, 6 Jul 2006 13:19:18 -0400
List-post: <>
Hmmmm!  Mine were right on the money at 90 deg.  I purchased mine last fall. 
It came from the Kansas plant.

I'd say that if it isn't 90 deg, it's defective.

Gil, W1RG
----- Original Message ----- 
From: "JC Smith" <>
To: <>; <>
Sent: Thursday, July 06, 2006 12:12 PM
Subject: Re: [TowerTalk] marb550 diagrams

> Hi Rick,
> You could be talking about my installation.  I had exactly the same 
> problem
> calculating the exact "lay-down angle" when I installed my MA550MDP with
> MARB.  I don't think the diagram you are looking for exists.  I suspect 
> you
> want to know what angle, with respect to the square base-bolt pattern, the
> pivot platform is placed on the RB so you'll know where the tower will lay
> down, and I suspect that may not be exactly the same angle on every base.
> One would thing it would be either 45 or 90 deg. to the square pattern, 
> but
> it isn't.  It is some odd angle (on mine anyway) and I had to measure it
> before I calculated my bolt placement.  In my case, the angle came out to
> 24.5 deg.  That doesn't tell you much but I still have the drawings I made
> and could scan and send them to you if you wish, BUT (and that's a BIG 
> but)
> I wouldn't count on yours being at the same angle as mine.  My suggestion
> would be to get some string, a tape measure and your trig calculator and 
> go
> measure it. (But my offer to scan and send still stands.)
> 73 - JC, K0HPS
> -----Original Message-----
> From:
> []On Behalf Of
> Sent: Wednesday, July 05, 2006 9:40 PM
> To:
> Subject: [TowerTalk] marb550 diagrams
> Thanks for the responses, I should have been more specific.  I own,  but 
> is
> still installed in the previous owners yard, a MA550 that also has a rotor
> base MARB550, and the raising fixture MAF-550.  I have measured the top of
> the MAF at 10 ft and know that I need 10" clearance for the pulleys etc
> outside of the center pipe.  What I was looking for was a diagram looking
> down on that arrangement.  I have not asked US Tower specifically for it,
> yet.
> --
> Rick Smith
> KT7G
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