The other factor to consider is whether or not your location will allow the
big crane to get on site. You may need to do some work clearing obstacles
and working on the grading and/or road base if you want a crane that can
handle a 200 foot tower installation.
73 John N5CQ
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of john@kk9a.com
Sent: Saturday, August 14, 2010 7:20 PM
To: TOWERTALK@contesting.com
Cc: Cqtestk4xs@aol.com
Subject: Re: [TowerTalk] Thoughts on towers and antennas
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.
GL
John KK9A / 4
To: TOWERTALK@contesting.com
Subject: [TowerTalk] Thoughts on towers and antennas
From: Cqtestk4xs@aol.com
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
which
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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