[TowerTalk] HOW MUCH MAST NEEDED IN TOWER

[N4BAA - JOSE CASTILLO]

TT Gang...

Relocating QTH here in VA BCH...

Have plans on 20 sq feet of antenna on my 2" .25 walled 18 
foot chrome moly mast....

What is a "safe" amount of mast to have IN the tower?  It is 
45G with of course double thrust bearing install.

Currently, I have it configured with 8 feet in the 
tower...and it has been on 25G for two years, one hurricane 
(100 + mph winds)....but would like to put as much ABOVE the 
  tower safely as possible....ideally for me about 15 
feet......But I don't feel the "numbers" support only 3 feet 
in the tower...and looks like 4 would be the minimum...

But if the current 8 is best to keep the "forces" where the 
"have" been...then so be it....But with the cost of CM 
mast...<smiling> would like to use as much as I can!!!!

Thanks!

Jose - N4BAA