[TowerTalk] AB-577 top stub

[Pete Smith N4ZR]

This is pretty speculative, so if anyone wants to erase now...

My AB-577 (the first and only one I've ever been up close and personal 
with) has a short stub of tubing that is integral with the top guy 
connection, and on which my C-3 mounts nicely .  If I want to stack a 
6-meter yagi on top of my existing tribander, I suspect that the best 
way to do so would be to telescope the bottom end of 6 feet or so of 
tubing inside the stub and put a bolt through to hold it both vertically 
and in rotation.  Just by chance, has anyone ever measured the inside 
diameter of that short stub (assuming that it is, in fact, part of the 
standard AB-577)? I'd hate to get the rocket launcher all the way down, 
only to find that the mast extension I will have selected is either too 
small or too large.

-- 
73, Pete N4ZR
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