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Re: [TowerTalk] 10 Meter Beams - Any IDEAS

To: towertalk@contesting.com
Subject: Re: [TowerTalk] 10 Meter Beams - Any IDEAS
From: K4SAV <RadioIR@charter.net>
Date: Sun, 08 Jan 2006 20:10:49 -0600
List-post: <mailto:towertalk@contesting.com>
OK, I'll concede one point.

If your interested in local ground wave contacts, then the fact that you 
lose most of the antenna gain with a vertically polarized quad, probably 
doesn't matter.  But I don't think it's the kind of thing a contester 
would be interested in doing.

Jerry, K4SAV

K4SAV wrote:

>I would not recommend feeding an HF quad with vertical polarization. If 
>you do that, the antenna pattern is no longer reinforced by ground 
>reflections, and you end up with something that has less than free space 
>gain.  If you have a UHF antenna that is far enough above ground to not 
>care about ground reflections, then maybe it doesn't matter.
>
>Jerry, K4SAV
>
>George P. wrote:
>
>  
>
>>Michael,
>>Quads rule. 4 elements minimum and you'll be on top. Set driven element up 
>>for both vertical AND horizontal. Use same feedline length for each 
>>polarity, and you can play with circular polarization if you add 90 degrees 
>>phase length (1/4W) in one of the feedlines. Vertical is great for late 
>>night ground wave for mobile contacts, state to state  <200 miles and the 
>>local repeaters. You may e-mail me for more info on how to set it up. When 
>>the band dies... there's always guys on groundwave using A99 verticals.
>>George AB2KC
>>
>>----- Original Message ----- 
>>From: "Michael Mark" <m2eng@mts.net>
>>To: <towertalk@contesting.com>
>>Sent: Friday, January 06, 2006 8:32 PM
>>Subject: [TowerTalk] 10 Meter Beams - Any IDEAS
>>
>>
>> 
>>
>>    
>>
>>>I like contesting and have the Canadian 10M Phone LP SSB record which I did 
>>>in 1991 with about 2500 QSO's.
>>>
>>>I used a Hy Gain LJ105 on a 48' tower back then at my old QTH.
>>>
>>>I have a couple of bucks now so I want something better for the upcoming 
>>>Sunspot Cycle increase.
>>>
>>>I have a 48' tower at my office building with nothing on it.
>>>
>>>As well, my flat building roof is 65' x 45' with 16' in height.
>>>
>>>I have new: A Stack Match for 2 antennas, new Ham IV and 2 Hy Gain 
>>>LJ105CA's and a Glen Martin 8' Roof tower.
>>>
>>>I was also considering a M2 10M7 or a Force 12 MAG 810 as well.
>>>
>>>Just asking for some ideas or experiences from you Contesters about your 
>>>10M antenna recommendations.
>>>
>>>Tnx
>>>
>>>Michael Mark, P.Eng., VE4MM
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>>>
>>>
>>>
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>>>   
>>>
>>>      
>>>
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>> 
>>
>>    
>>
>
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