roof mounting help

[David Clemons]

Hi,

	A couple weeks ago I asked opinions about how to advise a friend 
of mine who wanted to mount a mast through his roof.  He has decided 
against doing it that way for a variety of reasons, probably including 
some which were expressed in the responses I received.

	He has begun looking at the idea of a roof tripod.  The antenna 
he will mount will be a Mosely CL-33 tribander (I think it is about 5 or 
6 sf wind area).  He is considering one of the roof tripods by Glen 
Martin Engineering.  He also would like to use a long enough mast to get 
the antenna about 10 feet above the tripod.  My questions are:

	1. Has anyone had any experience with this particular brand of 
	   tripods?  I believe I've heard good things about some of the 
	   products made by Glen Martin, but I have no experience with
	   roof tripods.  (The wind ratings he read to me will be more 
	   than adequate for this antenna.)

	2. Is it possible for him to safely mount the antenna on such a 
	   long mast above the top of the tripod?  Intuitively this seems 
	   like it will put too much of a strain on the tripod.  (I also
	   don't have any idea how the antenna can be safely installed
	   by the worker.)  It would seem to me that the tripod will need
	   some sort of guying if the antenna sits very high above it.

	Any ideas will be appreciated.

73, Dave Clemons K1VUT


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