[TowerTalk] spacing

[goneil at tds.net]

Hi,
   I have a question or two concerning spacing of antennas.  First I'm relatively new to Amateur Radio and as such need some advice.  I'm putting up two towers soon and intend on using one of them for VHF/UHF applications and the other for HF.  I intend to place 3 antennas on the tower designated for VHF/UHF.  I currently have a verticle that does 2m/70cm that I intend to place on the very top.  I also intend to place a 2m beam vertically polarized underneath the vertical and then a 6m beam horizontally polarized below the 2m beam.  My question is, how far should these antennas be seperated vertically?  On the other tower I will have an A3S tribander just above the top of the tower, and would like to place a 10 meter vertical above that tribander.  How far above the tribander should the vertical be placed?  I know I don't have a clue as to the spacings needed so I'm depending on the ones on here that do.  
Thanks 
Greg O'Neal  KG4UZN