I use 30 feet for 2 6el yagis on 24 foot booms... Works great! Chuck W5PR Subject: RE: [TowerTalk] Stacking Distance for M2'd 6m7JHV? Half wavelength is standard for optimum coupling, or about 10 feet for 6 meters ((6*39.4)/(12/2)). What would be a starting point for stacking 2 6M7JHV 6 meter yagi's? Thanks...Rich