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
>>>_______________________________________________
>>>
>>>
>>>
>>>_______________________________________________
>>>TowerTalk mailing list
>>>TowerTalk@contesting.com
>>>http://lists.contesting.com/mailman/listinfo/towertalk
>>>
>>>
>>>
>>>
>>>
>>_______________________________________________
>>
>>
>>
>>_______________________________________________
>>TowerTalk mailing list
>>TowerTalk@contesting.com
>>http://lists.contesting.com/mailman/listinfo/towertalk
>>
>>
>>
>>
>>
>
>_______________________________________________
>
>
>
>_______________________________________________
>TowerTalk mailing list
>TowerTalk@contesting.com
>http://lists.contesting.com/mailman/listinfo/towertalk
>
>
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|