[TowerTalk] Fwd: effect of two wire antennas end to end

[Hans Hammarquist via TowerTalk]

Steve,


There is interaction between dipoles even if they are end-to-end although it is a lot less than if they are facing each other. I would be worried about the interaction between your towers and the dipoles just as much as the interaction between them. Shorter distance gives more interaction needless to say.


My suggestion to you is to keep the same distance between the end of the towers and dipoles as between the dipoles.


You can keep dipole, facing each other, at a relatively short distance without problem as long as the are not tuned to the same frequency and I guess therefore that your arrangement would work fine.


Good luck, de,


Hans - N2JFS



-----Original Message-----
From: k7awbgoog <k7awbgoog at gmail.com>
To: towertalk <towertalk at contesting.com>
Sent: Tue, Feb 24, 2015 10:46 pm
Subject: [TowerTalk] effect of two wire antennas end to end


I have 135 feet between my two towers and might put two dipoles or double 
bazookas between them, end to end  using one rope.  I would drop the feed lines 
straight down to the ground.  Probably one would be 40 meters and the other 30 
meters since I don’t have  antennas for those bands up yet and I need a quick 
job to start working the rash of DXpeditions now that I miss on those two bands.  
The two antennas take up about 105-117 feet or so horizontally so I would have 
13-30 feet of rope to distribute between the middle and the two ends.

Is there any interaction between the two wire antennas put end to end?   Does it 
matter how close they are to each other?

I would use 1:1 baluns for each so there would be some weight up there and a 
catenary curve to all of it.

Since my towers are in line at 305 degrees towards Japan, the wire antennas 
would face EU and ZL-VK land.

Any thoughts on this?  


Steve Sala
K7AWB
Nine Mile Falls, WA
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