[VHFcontesting] 432 collinear array setup

[jeff millar]

Dave...

Definitely stack them vertically.  If you go horizontal, the beam width gets
too narrow and you miss stations.

The H frame consists of one (or two) horizontal member(s) with two vertical
members on the ends.  Here's some pictures from a brief google search

    http://w9ice.com/220_H_frame.jpg
    http://w9ice.com/wb8erb_ant_work2.jpg
    http://www.mgef.org/timeline/1973.htm
    http://www.n1bug.net/station/neweme/432qrp.html
    http://www.m2inc.com/products/vhf/2m/2MXP28DS.pdf
    http://www.elite.net/~k7xq/about_me.html

On my tower, I plan to locate the bottom two antennas below the top of the
tower.  The top guys attach one tower section below the top, leaving 10 ft
of free space for the lower antennas on the H.   This maximizes the amount
of mast available for other antennas....and provides additional vertical
mounting places for stacked beams on the higher bands...like two 1296
loopers on one side and two 903 loopers on the other.

jeff, wa1hco

----- Original Message ----- 
From: "David Vondrasek" <n5ito at davidv.net>
To: <vhfcontesting at contesting.com>
Sent: Tuesday, September 16, 2003 7:20 PM
Subject: [VHFcontesting] 432 collinear array setup


> At the moment I am building a array of DX-420 collinear antennas. I have
4
> each of the DX-420s (20 ele) Giving me 80 elements.  At present I have an
> frame that stacks them as such..
>
>
> ____     ____
> __|__    __|__
> __|__    __|__
> __|__    __|__
> ____     ____
> __|__     __|__
> __|__     __|__
> __|__     __|__
>
>
> A bay of 4 antennas, with a height of around 9 feet, about 5 feet wide on
2
> cross booms, one at the center, and one across the bottom area. I didn't
> see a need for a 3rd across the top as the arrays are small and not much
> wind load. the bottom give it a little more stability and keeps the 2
> stacks in line with each other. While standing back and looking at it. I
> had thoughts of running them side to side instead.. Such as this
>
> ____      ____     ____      ____
> __|__    __|__    __|__     __|__
> __|__    __|__    __|__     __|__
> __|__    __|__    __|__     __|__
>
> This would give them less height while on top of the 60 foot tower and
> cause less strain on the hazer,rotor,thrust barring, etc I assume..
Anyone
> have comments on the alternate layout ? Pros, cons ? Suggestions ?
>
>
> One another note, I have 80 eles for 220mhz also that I have no use for
and
> had thoughts of converting them to 432 mhz ( to small for 144) this would
> give me 160 eles on 432 to play with.  This would most defiantly have to
me
> a 4X4 stack I assume..
>
>
> Dave
> N5ITO
> The 144 array is next.....
>
>
>
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