[TowerTalk] 3el on 80m with another antenna?

[Gia Gvaladze]

Hello everybody
  I need your help please.
  This summer I will erect a new 100ft tower to place 80M3A of M2 on the top of it. 
  Need to use the same tower for placing as high as possible without seriousely compromising either antennas:
  5 or 6 element monobander on 20m or
  Steppir Monstir or
  Optibeam 17-4 
  I undertsand that it requires modeling or experience someone already has here (or both). Greatefull of any good suggestions
  Many thanks
  Gia 4L4WW

 
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