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Re: [TowerTalk] Thoughts on towers and antennas

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Subject: Re: [TowerTalk] Thoughts on towers and antennas
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Date: Sat, 14 Aug 2010 20:19:59 -0400
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When modeling my 6el 20m beams, I found 50' spacing to be too close, but 
perhaps it works OK with smaller beams.

Rohn 65G is nice tower once it's up.  You can space the guy wires out 50 or 
60 feet, leaving room for the antennas to turn.  I used a crane to put mine 
up, however getting a crane for your 200' tower can be expensive.  I have 
seen gin poles that can handle it, but they are pretty heavy and you 
definitely need a skilled person on the ground to install it this way.

John KK9A / 4

Subject: [TowerTalk] Thoughts on towers and antennas
Date: Sat, 14 Aug 2010 04:30:55 EDT

Since I am heading back to the mainland (FL) I am now thinking  about a new
set up.

Tower 1...rotating Rohn 65...200 ft
4/4 M2 40 Yagis 200/100' (total 26 sq ft)
3 KT36XAs  90/60/30' (total 31.5 sq ft)
2 A3WSs 80/40' (total 8.2 sq ft)

Tower 2...rotating Rohn 65...200 ft
4  5el M2 20m Yagis 200/150/100/50 (total 42 sq  ft)
4 7el M2 10m Yagis 120/90/60/30 (total 24 sq ft)

Tower 3...rotating Rohn 55...200 ft
4 6el M2 15m Yagis 150/113/75/37 (total 34 sq ft)
1 3el 30m Yagi 100' (10 sq ft)
2 7el 6m Yagis (7 sq ft)

Any thoughts?  Especially interested on the guys who have used  65 before.
I am pretty confident on the 55's ability to handle the load,  as I had
about 55 sq ft on the 55 at my old FL QTH and those were on sidemounts 
produced some pretty heavy duty torque in windy condx.

I have run N6BV's program and all looks good for the  patterns.  Anybody
see any serious interaction on any of these.  I  know there will be some on
the XA at 90 ft on 15 meters since it is close to the  40 meter Yagi.  I had
my XA and the 40 meter Yagi around 12 feet apart in  KH6 and saw very little
interaction.  Besides, the XA stack is a secondary  one for 10-20 meters.

Rotating device will be K0XG stuff.  Thoughts on  these?

This will be my last setup (said that before) and I want to do  it right.
Thanks for the help.

Bill KH7XS/K4XS 


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