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#1
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I am planning how to set up my VHF/UHF station and I need some help.
You can orient a VHF antenna horizontally for CW/SSB work or you could orient that same antenna vertically for local FM use. What if I am new to VHF/UHF and I want to do both. Could you get a circularly polarized antenna, with both horizontal and vertical elements and use it for both types? I don't want to buy two of the same antenna, only to have one horizontal and one vertical. What is your advice? Rod KI7CQ |
#2
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Rod Maupin wrote:
What if I am new to VHF/UHF and I want to do both. Could you get a circularly polarized antenna, with both horizontal and vertical elements and use it for both types? I don't want to buy two of the same antenna, only to have one horizontal and one vertical. Mount your beam antenna at 45 degrees to the vertical. You can work both and only lose half an S-unit. -- 73, Cecil http://www.qsl.net/w5dxp |
#3
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Thanks Cecil. That's great advice.
Problem solved. Rod KI7CQ |
#4
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That works pretty good until the other guy is also at 45 to the world
and 90 degrees to you! John Ferrell W8CCW On Tue, 08 Nov 2005 20:07:01 GMT, Cecil Moore wrote: Rod Maupin wrote: What if I am new to VHF/UHF and I want to do both. Could you get a circularly polarized antenna, with both horizontal and vertical elements and use it for both types? I don't want to buy two of the same antenna, only to have one horizontal and one vertical. Mount your beam antenna at 45 degrees to the vertical. You can work both and only lose half an S-unit. |
#5
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That works pretty good until the other guy is also at 45 to the world
and 90 degrees to you! .... or is using a standard horizontal antenna, but happens to be located in the plane of your antenna. In this situation, he will "see" only the component of your antenna's radiation pattern - he'll be in a deep null for any horizontal radiation and may not hear you at all. Building an antenna which is omnidirectional, and which also has substantially equal horizontally- and vertically-polarized signal components over the full omni donut, is possible (commercial FM services do it) but seems to be tricky, expensive, and prone to being narrow-band. -- Dave Platt AE6EO Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
#6
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John Ferrell wrote:
That works pretty good until the other guy is also at 45 to the world and 90 degrees to you! When two pilots are trying to avoid a head-on collision, they both bank right. Is there a similar convention for slanted beams? :-) -- 73, Cecil http://www.qsl.net/w5dxp |
#7
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Perhaps I should try it vertically for a while and then horizontally for a
while, see which way I like the best, and then leave it at that polarization. Rod KI7CQ |
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