[TowerTalk] Dish On A Tower

[Jim Hoge]

Jim,
   
  That's assuming the dish will be aimed at the horizon. What is the intended application, terrestrial or lunar? If for EME, I don't understand the height above ground. The advantage of EME besides being lower is that the dish can be parked aiming straight up, greatly reducing drag. Still needs a robust mount though. If for terrestrial, possibly giving up a few dB for a yagi array is an option. My 4x array of 35? element M2 yagis produces ~24 dB while a dish should be ~30dB. Considerably smaller installation too.
   
  my two cents,
  Jim W5QM

Jim Lux <jimlux at earthlink.net> wrote:
  At 03:11 AM 5/19/2007, JMLTINC at aol.com wrote:
>
>Hello to all,
>
>I am considering using a 10' dish for 1296. I would like to see it up 70'.

To a first order, you're looking at a drag area of 3.14*25 square 
feet (what's that, about 80 square feet?)

In a 80 mi/hr wind (16 lb/sf, roughly) that's going to be 1280 pounds 
of wind drag!

better be a burly tower.




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