Topband: Aluminum Tubing

[Bill Gerhold]

Is there a rule of thumb on how much distance aluminum tubing should be
inserted into each other section?

I am putting up an all aluminum 80 meter vertical (66 ft) guyed at 20 feet
and 40 feet and is also guyed at the tip.  I was putting 12" into each
section but, doing the math, if I put 6" into each section, I can eliminate
one entire 6ft section.  Makes the antenna lighter and easier to handle.
Since the antenna is vertical and guyed with most of the stress straight
down, I feel this should be OK mechanically.  The bottom section is 2.125
OD" and tapers to 3/4" OD at the top.  Any recommendations, criticisms?

Bill
K2WH


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