I was just wondering, since I am starting from scratch if having
larger dia tubing was a plus or a minus when all the factors are
considered. BTW the EMT and aluminum tubing have about the same wall
thickness (0.065" & 0.058").
Since the "strength" increases at the fourth power of the radius of
the tube while the load increases at 2 x the radius, without running
the exact specifics, I would suggest the larger diameter version will
be stronger overall.
73,
... Joe, W4TV
On 2020-01-01 12:41 PM, Gedas wrote:
Hi there. You had it right on the nose below when you said structural.
I am aware of the minute differences in radiating efficiency between a
wire and length of tubing. As these are going to be elevated verticals
my primary concern will be which bends over first in a 70-80 MPH line wind.
I still have standing one such vertical I made over 20 years ago that
has survived horrible wind storms. It is a hybrid just like what I
described....simple EMT and aluminum tubing. I was just wondering, since
I am starting from scratch if having larger dia tubing was a plus or a
minus when all the factors are considered. BTW the EMT and aluminum
tubing have about the same wall thickness (0.065" & 0.058").
Also regarding cost, my price to put two of these antennas together is
about half of the spider-beam pole which is why I am considering going
this route. TU very much for ur input.
Gedas, W8BYA
Gallery at http://w8bya.com
Light travels faster than sound....
This is why some people appear bright until you hear them speak.
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