I am hoping to build an 80 meter 1/4 wave vertical, but have several practical
questions.
Size of aluminum tubing? I don't want to waste $ and buy too big, but obviously
don't want it too small either. http://www.texastowers.com/aluminum.htm
shows what TT sells (and thankfully they are local to me). I plan to get the
12'
lengths (unless that is a bad idea for some reason). Do I start with 1.75" and
step
down ending up with 1.25" on top? Bigger/smaller?
What about a guesstimate on the length, using tubing like this? If a wire
dipole leg
would be 61.25' (468 / 3.82MHz / 2), what would be a good starting length for
tubing?
Also need an idea on making some sort of attachment point a little over halfway
up
to attach some dacron "guys" for support. Simple smallish eye-bolts?
Should I be concerned about dacron getting wet and affecting SWR/performance?
And what is the best way to attach the bottom of the antenna to a 4x4 post,
maintaining insulating properties from the post but yet very strong. Perhaps
grey PVC over the aluminum and some sort of bracket? I'm having problems
visualizing it...
Dave N0RQ
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See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
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