[TowerTalk] Moving Resonance of Dipoles

[n4kg@juno.com]

Yep, worked like a champ.  Actually, that's what I did 
at W8UM, making one side about 60 ft and adjusting
the other end to resonate at 3525 and 3800 when the
wire end was moved between the support rope or 
folded back over the antenna wire from the insulator.

Tom  N4KG


On Wed, 14 Nov 2001 Pete Smith <n4zr@contesting.com> writes:
> 
> For most of my ham career I thought that a dipole had to be 
> symmetrical --
> which will tell you how technically competent I am.  Then I read 
> about the
> good results that W2UP and others had adding length to just one 
> side.  I
> was curious about the quantitative side of this, so I modeled a
> symmetrical, resonant dipole in free space at 3.5 MHz (actually 
> 3520), then
> removed  wire from one end to move the resonance all the way to 4.0 
> MHz.  
> 
> feedpoint at 3.520 MHz -- 71.9 +j .1  (66.75 feet of wire either 
> side of
> center)
> feedpoint at 4.0 MHz -- 72.8 +j 3.6 (51 feet on one side, 66.75 on 
> the other)
> 
> QED  
> 
> 73, Pete N4ZR
> www.qsl.net/n4zr
> 
> 
> 
> 
> 
> List Sponsored by AN Wireless:  AN Wireless handles Rohn tower 
> systems,
> Trylon Titan towers, coax, hardline and more. Also check out our 
> self
> supporting towers up to 100 feet for under $1500!!  
> http://www.anwireless.com
> 
> -----
> FAQ on WWW:               http://www.contesting.com/FAQ/towertalk
> Submissions:              towertalk@contesting.com
> Administrative requests:  towertalk-REQUEST@contesting.com
> Problems:                 owner-towertalk@contesting.com
> 

________________________________________________________________
GET INTERNET ACCESS FROM JUNO!
Juno offers FREE or PREMIUM Internet access for less!
Join Juno today!  For your FREE software, visit:
http://dl.www.juno.com/get/web/.

List Sponsored by AN Wireless:  AN Wireless handles Rohn tower systems,
Trylon Titan towers, coax, hardline and more. Also check out our self
supporting towers up to 100 feet for under $1500!!  http://www.anwireless.com

-----
FAQ on WWW:               http://www.contesting.com/FAQ/towertalk
Submissions:              towertalk@contesting.com
Administrative requests:  towertalk-REQUEST@contesting.com
Problems:                 owner-towertalk@contesting.com