[CQ-Contest] antenna setup question

[Pete Smith N4ZR]

K3NA did some sophisticated studies a decade or so agoof the K4JA 
multi-tower station, for NCJ.  You might be able to find those, Timon, 
or get in touch with him.

73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.

On 8/24/2014 9:40 PM, David Siddall wrote:
> Hi Timon,
>
> With multiple towers available, I would keep my 40 meter antennas off any
> tower with 15 meter antennas -- whether monobander 15's or tribanders.  Too
> often 40's disrupt the pattern of the 15's.  It seems to be very antenna-
> and spacing- specific, and I am not 100% confidant in modeling for this
> issue.
>
> GL es 73,
>
> Dave K3ZJ
>
>
> On Sun, Aug 24, 2014 at 5:25 PM, Timon Kruijer <Pa1t at xs4all.nl> wrote:
>
>> Hello fellow contesters.
>>
>>
>>
>> I have an antenna setup question.
>>
>>
>>
>> This year (and the next) I am building a new HF station. Next to the house
>> I
>> will have four rotary towers standing in a square which are 40 meters
>> apart.
>> The towers are rotatable and are 25m (83 feet) high from the ground.  Every
>> tower will also have a rotor in the top with a 2 meter mast so in total 27
>> meters (90 feet). The towers have rings on 24 meters and on 11 meters (not
>> fixed yet) as they are still lying on the ground.
>>
>> To rotate and calculate the directions for each tower and the top antenna I
>> use Microham Station Master de Luxe.
>>
>> My goal is to have a competitive contest station for SO2R, Multi Singe and
>> Multi-2 use.
>>
>> What would be a good suggestion for the antennas in the four towers?
>>
>> The terrain is flat.
>>
>>
>>
>> The antennas I have available at the moment are:
>>
>> -              2 el Force 12   40 meters
>>
>> -              4 el Steppir     10-15-20 meters
>>
>> -              Optibeam       10 15 20 meters
>>
>> -              Force 12 c31xr    10 15 20 meters
>>
>> My idea so far is to use these 4 antennas for multipliers etc.
>>
>> I would like to have additional 2 antenna stacks for 20, 15, and 10 meters
>> (which I have to build).
>>
>>
>>
>> A possible setup could be:
>>
>>
>>
>> Rotatable Tower 1
>>
>> top rotatable,  Steppir
>>
>> bolted at the tower 20 meter yagi
>>
>> bolted at the tower 20 meter yagi
>>
>>
>>
>> Rotatable Tower 2
>>
>> top rotatable, c31xr
>>
>> bolted at the tower    15 meter yagi
>>
>> bolted at the tower    15 meter yagi
>>
>>
>>
>> Rotatable Tower 3
>>
>> top rotatable, 2el 40m
>>
>> bolted at the tower    10 meter yagi
>>
>> bolted at the tower    10 meter yagi
>>
>>
>>
>> Rotatable Tower 4
>>
>> top rotatable, 3 el 40m
>>
>> bolted at the tower     optibeam 10 15 20M
>>
>> bolted at the tower     3 el 40m
>>
>>
>>
>> Or setup 1 multiplier tower and use the others for 10 to 40 meters. Which
>> band to have a double set antennas when this would be a solution?
>>
>> For 40 and 80 meters I will have additional 4 squares behind these towers.
>> Also possible would be to have wire 4 squares hanging on ropes between the
>> towers (between the top rings on 24 meters).
>>
>> For 160 meters the towers can be a 4 square by itself (they are isolated).
>> Also the ropes could be again for a 160 meter antenna.
>>
>>
>>
>> Suggestions and comments are very welcome. Please your ideas.
>>
>>
>>
>> '73 Timon
>>
>> PA1T
>>
>>
>>
>> Home page www.pa1t.com
>>
>> Tel 31 (0)598416308
>>
>> Cell phone  31 (0)657545506
>>
>>
>>
>> _______________________________________________
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>>
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