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Re: [TowerTalk] Antenna Spacing

To: <>
Subject: Re: [TowerTalk] Antenna Spacing
From: "Yo3ctk" <>
Date: Mon, 8 May 2006 18:54:32 +0300
List-post: <>
While we are on the subject, please allow me to ask a related question. My 
current situation is as follows:

I have a rotatable F12 C4XL @ 24m and a fixed 15m monobander @ 17.5m 
oriented NW (lambda/2 from the 15m section of the tribander and lambda from 
the ground). I want to add another identical 15m mono, oriented NE (that is, 
right angle from the first mono). I plan to use a STACK-2 from Comtek to 
switch the two fixed monoband yagis. The F12 will operate independently.

As my interest is primarily contests, I'd like to use the two fixed yagis to 
beam into Western EU/USA and Asia respectively, and the rotatable 4-bander 
into the rest of the world. The mono beams have adequate gain, so I'm not 
after more gain.

Now, the question is on the placement of the second, fixed, NE oriented 
monobander. I could place it a further lambda/2 lower on the tower, thus 
respecting the stacking distance but having the NE antenna at only lambda/2 
height or I could place it in the immediate vicinity of the first fixed 
mono, taking advantage of the right angle orientation and thus preserving 
lambda height.

Both 15m monobanders in discussion are Hy-Gain 5-el Long Johns.

Which is the best solution, given the information above? Any and all 
comments appreciated.

73 de Mike, YO3CTK
YR7M stationmaster

----- Original Message ----- 
From: "Ian White GM3SEK" <>
To: <>
Sent: Monday, May 08, 2006 6:07 PM
Subject: Re: [TowerTalk] Antenna Spacing

> Follow the link from my home page (below) to "Stacking".
> -- 
> 73 from Ian GM3SEK         'In Practice' columnist for RadCom (RSGB)


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