On Wed, 31 Jul 1996, Dave Raymond-CSUS04 wrote:
>
> I was planning on putting 3 TH7's up at 42', 82, and 122' (it's
> convenient to mount one above each set of guys-also, there will be
> ultimately be other HF antennas on the tower). However, after
> reading the TH7 stacking info in the recent NCJ, I'm not so sure 40'
> spacing is the way to go.
Hi Dave,
I've been helping and operating at N7ML's station with the stack of Force
12's. As Steve, K7LXC, points out, there are 6 stacked at 30' on a 190'
rotating Rohn 55 tower. This stack plays very well, but...
I think the stacking you propose depends on what you want to do and where
you live. For contesting, having all antennas point in the same
direction is not a good idea. In fact, its a bad idea. You need some
diversity and the ability to put some rf in another direction than where
the stack is pointing. I would put the top TH7 at the top of the tower
on a separate rotor. You will need to keep track of its direction
relative to the rotating tower but that should be too hard to do except
at 3 o'clock in the morning! I'm trying to convince Mike to do that with
his top antennas on the triband and 40 stack. It would be even better to
be able to independently rotate all three TH7's. Is there a way to turn
the guy rings into rotating antenna mounts? Just a thought.
73,
Fred KE7X
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