Use steel for the cross-boom and you will have no worries. The info on how
to do it is here:
http://www.g6lvb.com/fibermetalboom.htm
Most OSCAR operators want at least 7 feet between the antennas, but more is
better. Some guys get by with 5 feet separation, but you may want to look
at a filter for mode J at that point. Something like you find here:
http://www.amsat.org/amsat-new/articles/Mode-J/
Make sure you have a good idea as to how the U-100 is going to report your
elevation back to your automated controller. There are several ways, but it
can be problematic as you are probably aware there is no potentiometer in
the rotor.
73,
Joe kk0sd
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Marc Tessier
Sent: Monday, September 28, 2009 9:45 PM
To: towertalk@contesting.com
Subject: [TowerTalk] Dual Yagi Install help needed- Using U-100 Rotor
forelevation
Hello Tower folks,
I have a few questions regarding a satellite setup I plan to complete very
soon. They are as follows...
I am just about ready to install my home built 144 and 432 yagis on my tower
using a U-100 rotor for my elevation rotor. My questions are as follows...
1- What material did anyone use for a cross boom, i.e. wood shaft if so what
dia ? and what did you do to it to a) protect it from the elements of
weather and b) did you slide a sleeve of metal over the dowel to prevent the
clamps from tearing it during use? And I would expect this sleeve to be
placed only over areas where clamping will be done.
1-c What length is considered maximum for a sleeve and still show little
interaction with my 432 yagi?
2-What is the minimum amount of space you used to install a set of yagis
similar to what I have , which is an 11 ele for 432 and a 7 ele for 144 MHZ.
I plan to build a automated satellite tracker for my rotors this winter and
for the time being I had planned on mounting both yagis on a common non
metallic cross boom at a 15 degree elevation, is this also the best
installation in my given situation?
Her is hoping I can get some good information as I hope to get this up
before snow flies up here in Ontario, which could be in the next 3 months...
Hi Hi !!!
By all means feel free to reply either on the list or direct, although I
have always favored on the list so others too can benefit from my learning
experience...
73 and hope to hear you on the birds soon...
Marc R. Tessier - VE3TES
ve3tes@cogeco.ca
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|