[TowerTalk] Tribander comparisons

[K4SAV]

Bill, have you looked at those stacks in HFTA? If the antennas are right 
next to the bluff you may have some troublesome nulls.  For example, on 
20 meters, a null at 13 degrees. On 15 meters nulls at 8.5 and 17 
degrees.  If the antennas are sitting back from the bluff, the answers 
will be significantly different.  It would be worth while looking at it 
in HFTA to see the effect of moving the tower position relative to the 
bluff.  You can also play with the stacking distance to see what works 
best for your location.  It may be a lot different from the flat ground 
answer.

Congratulations on an upcoming good location.

Jerry, K4SAV


Cqtestk4xs at aol.com wrote:

>Pending the sale of my home I will be QSYing to KH6.
>
>Only one tower is allowed and is limited to 90 feet...(maybe I can cheat it 
>to 100).
>
>Plans are to stack three tribanders.
>
>I will be starting from square one on the installation.  Thoughts on what 
>tribander antennas to use.  Clearance is not too much of a problem since I plan 
>to be using Rohn 65 and will not have to worry as much about guys as with 
>smaller tower.
>
>Main antennas in mind right now are from M2 and Force 12, with antennas at 
>30, 60 and 90 feet...using WX0B boxes for phasing them.  90/30 for 20 and using 
>all three for 10 and 15.
>>From my experience that should be a pretty reasonable setup, especially 
>considering the property I'm looking at sits on a 100+ foot bluff.
>
>Also, I may be going the rotating tower route.  Any experiences in that area?
>
>Ideas?
>
>Bill K4XS
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