[TowerTalk] mast intrusion into tower

Al Williams alwilliams@olywa.net
Sat, 13 Jan 2001 01:08:25 -0800

Two recent postings have 8' of a 21' mast and 6' of a 12' mast inside the
tower.  Why so much, if the
bottom end of the mast is bolted to a sturdy rotator and mounting plate?

I am planning to put a 11 sq ft windload antenna at the top of a 20' Chrome
mast that will bolt to a
Orion 2800 rotator sitting inside the LM470 tower.  The antenna to be is a
Force12 Magnum 2/2
for 80 & 40 so I want as much height as can be safely achieved.

I will appreciate comments on how far to insert the mast and also whether
the 80-85 foot height
is adequate for the 80 beam.


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