[TowerTalk] Stacking SteppIR and 6M7JHV

[Michael M. Raskin]

Guys - I need some advice on stacking on a 15' mast.  I will have 
approximately 13" of usable mast and want to have a 3-element SteppIR with 
the 40/30 adder (16' boom) at the bottom of the mast, but I also want to use 
the M2 6M7JHV (30' 8" boom) above it.  The SteppIR will not interfere with 
the 6M7 as I can make transparent by retracting the element.  If possible, I 
would also like to use a M2 2M9 (14' 6" boom) 2M beam as well.  Should I put 
the 6M beam on top and the 2M beam between the 6M beam and the SteppIR, or 
should I put the 2M beam on top?  The one antenna that I don't want to 
degrade the performance of is the 6M beam.  I can live with the SteppIR and 
6M7 and ditch the 2M beam, if the three are too close for comfort.  I know 
the SteppIR can do 6M and is a good performer with the extra passive 
element, but it will never perform as well as the 6M7.  So my real question 
is:  do I go with only the 6M7  about 10' above the SteppIR (need 3' above 
6M7 for truss) or can I slip a 2M beam on the mast as well without degrading 
6M performance?  And, if so, where is best to place the 2M beam?  I think I 
already know the answer that I'll get:  use only the 6M and SteppIR, but I 
just want to be sure.

Mike, W4UM