[TowerTalk] More on Orion mast clamps

Mike Harris mike.harris at horizon.co.fk
Fri Mar 3 16:58:00 EST 2006


| One more data point.... I had a CrMo mast with three monobanders on it 
at my
| previous QTH. I had no slippage in the Orion mast clamp. Antennas were 
| KLM (20M5, 15M6 and 10M6).

Maybe they are properly torque balanced.  There was quite a thread on this 
subject in January 2005.  The David Leeson spreadsheets derived from his 
book "Physical Design of Yagi Antennas" provide a method whereby mast 
torque and appropriate compensation can be calculated/designed.  Seems 
more sense to me that trying to make stronger and stronger more grippy 
clamps and bust gears.

The book is a good read too.


Mike VP8NO 

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