[TowerTalk] 40m rotatable dipole

[Keith Dutson]

My experience with ladder line has been similar to yours regarding RF.
Using a full size dipole may help, but will likely not solve the problem
completely.  I think the biggest contributor is the balun.  I got much less
RF using coax with simple coiled balun at the feed point.

Keith

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of kb2m
Sent: Tuesday, September 28, 2004 5:52 AM
To: 'TowerTalk Reflector'
Subject: [TowerTalk] 40m rotatable dipole

 I'm going to drop my tower this coming weekend. One of the things I plan on
doing is replacing my 44' rotatable dipole with a 66' one. I looking for
suggestions on what feedline to use. I'm now using 450 ohm ladder line into
a 4-1 balun, then a short run of coax into the shack. I've had some rf
problems with the 44 footer,  that I think might be solved by the better
match of the 66 footer? Should I consider different feed line? I have a coax
run already in place that is not being used, so it would be easy to switch
over. also mounted on the tower  is a Steppir 4L at 64 feet, and
2M,1.25M,70CM, beams starting at 78'. Where would you position the 40M
dipole in the 14' space between the 4L and the 2M beam? I didn't notice any
interaction between the 4L and the 44 footer. Thanks in advance for any
useful suggestions....

73 Jeff kb2m 


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