Gerald,
Interesting! I had come to believe that it would be best to stack a pair
of yagis on a mast since it saves the complications (and extra expense) of
side mounting one of them on the tower with a separate rotator. Am I wrong
on that?
You've really got my attention on this Gerald. If it takes getting this
program, I'm sure game. I want to stack a pair of monobanders (20 and 40)
and I've got to decide which tower is going to give me the most strength and
safety for the purpose and the cost:
1) The T500-72 spec is 45, 22 and 6 square feet respectively at 70, 85 and
100 mph.
2) The T600-64 spec is 50, 35 and 15 square feet respectively.
I need to know which constributes the most to my application :
1) The T500-72 with yagis at 74 feet (two ft mast) and 64 feet (side mounted).
2) The T600-64 with ten or twelve feet of heavy duty mask entended for the
yagis.
Don't you think the T600-64 is the simpler, stronger, and cheapest of the
two solutions? <G>
73,
Frank - W0ECS
Gerald wrote:
>Frank, regarding long masts in marginal towers: I have a short program that
>gives the amount of twist in a mast given its length, diam, wall, type
>material and load. It is available for the asking.
>
>One of my universal rules is "masts are never a substitute for tower
>sections". After all is said and done, tower sections are more cost effective
>than equivalent strength slender masts. There is no profit motive here as
>tower sections are much less profitable for us than masts!
>
>73 de Gerald Williamson, K5GW, Owner/General Manager, Texas Towers
>
>
>
>
--
FAQ on WWW: http://www.contesting.com/towertalkfaq.html
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|