>-----Original Message-----
>From: towertalk-bounces@contesting.com
>[mailto:towertalk-bounces@contesting.com]On Behalf Of Larry Banks
>Sent: Thursday, April 09, 2009 16:19
>To: Dan Zimmerman N3OX; towertalk@contesting.com
>Subject: Re: [TowerTalk] Gizmotchy's
>
>
>Hi Dan,
>
>You said this far better that I did! Thanks for the better explanation.
>
>For the record, I used a 2M yagi at 45° for a few years to "optimize"
>(compromise?) both SSB and FM. Worked. Turned out is was great for
>directing Fox Hunts -- with the tricks the foxes did.
>
>73 -- Larry -- W1DYJ
Larry,
I have a better idea. I have a 14 element Hygain 2m beam. I installed a TV
antenna rotor mounted horizontal at the midpoint of the Boom and rotate the
beam vertical for FM and horizontal for SSB and anywhere in between for
possible phasing. I modified the rotor and installed limit switches and do
not use a control box. I just added a On/OFF/ON switch to the my main
controller. It has operated great for the past 20 years.
* 73's Jim W5IFP *
>
>
>----- Original Message -----
>From: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
>To: <towertalk@contesting.com>
>Sent: Thursday, April 09, 2009 11:52 AM
>Subject: Re: [TowerTalk] Gizmotchy's
>
>
>> >
>>> If it's really both
>>> horizontally and vertically polarized (not circular)
>>
>>
>> Anything that's not elliptically/circularly polarized is
>just linearly
>> polarized, and the "ratio" of vertical to horizontal response
>just depends
>> on the tilt of the elements with respect to horizontal and vertical.
>>
>> A yagi rotated 45 degrees from horizontal or vertical using
>its boom as
>> the
>> axis is a linearly polarized antenna that responds equally to
>horizontal
>> and
>> vertical signals. But if you have an ionospheric fade going with
>> polarization rotation of a linearly polarized wave, it's going to work
>> exactly like any other linearly polarized antenna. When the
>incoming wave
>> is cross polarized with the antenna, you get maximum fading.
>>
>> So no matter how fancy it gets, if it's not designed for
>> elliptical/circular
>> polarization, it has *one* tilted polarization.
>>
>> 73
>> Dan
>> _______________________________________________
>>
>>
>>
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>
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