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#1
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![]() thanks very much to all those that replyed, but don't forget, we all agree that somtimes the dipole will work better sometimes the vert but the realy trick i wonder about is how many times will the vert be useful my guess is prob 50/50 but wasn't sure how 'random' it might all be In article , ml wrote: hi i am pondering this again after thinking the odds of being about to put a beam up are slim currently i have a nice dipole CF horiz via a topside sgc , i am happy w/it i think i might be able to get a verticle (all bander) up there but then i wonder overall if it would really pay from just a performance point of view the reviews i see i personally average as some signals would prob come in bettter on one and some signals the other 'depending' but i guess i can't quantify if at the end of the day i'd say wow really glad i had that vert or if perhaps having a 2nd antenna would really net me only a marginal end of year bunch of extra qso's perhaps a unrelated question #2 given the building master tv antenna is close by, would one guess that a verticle or a small triband beam would give off more tvi?? assume both would be slightly higher than the tv ant but close proximity thanks |
#2
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![]() "ml" wrote but don't forget, we all agree that somtimes the dipole will work better sometimes the vert but the realy trick i wonder about is how many times will the vert be useful my guess is prob 50/50 but wasn't sure how 'random' it might all be To understand the benefits of vertical vs. dipole, one has to look at the radiation diagram of each antenna at particular height. Vertical has the lobes, where horizontal dipole has the nulls and vice versa. The other aspect is the polarization which plays bigger role in close range signals, long range DX signals have varying polarization after they go through the path. Then there are varying angles of arriving signal depending on propagation media. Another spect is that Vertical has omnidirectional pattern, while dipole has nulls in the pattern (off the ends). Depends how the antenna pattern and properties fit the current propagation mode/situation, that antenna would be better. So one has to look at the antenna pattern and have idea what propagation angles and polarization we are looking for. Verticals need good ground/soil/radials/salt water for better low angle performance. The answer to which is better: vertical or dipole is - YES, jus' depends wasaaaap (or down)! Yuri, www.K3BU.us |
#3
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Is the polarity of the sending station and receiving station relevant
to this discussion?? That is, a dipole sending station and a dipole receiving station would tend to out perform a dipole sending station and a vertical receiving station and vice versa? Are there more stations with dipoles than stations with verticals? |
#5
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Cecil Moore wrote:
wrote: Is the polarity of the sending station and receiving station relevant to this discussion?? Yes on ground wave VHF/UHF. No on HF skip. Oops, lest some nitpicker jump in, I should have said "surface wave", not "ground wave". And I probably should have included a "usually" while I was at it. -- 73, Cecil http://www.qsl.net/w5dxp |
#6
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ORIGINAL MESSAGE:
Cecil Moore wrote: Cecil Moore wrote: wrote: Is the polarity of the sending station and receiving station relevant to this discussion?? Yes on ground wave VHF/UHF. No on HF skip. Oops, lest some nitpicker jump in, I should have said "surface wave", not "ground wave". And I probably should have included a "usually" while I was at it. -- *********** REPLY SEPARATOR *********** Nitpicker alert: 1. You should have not limited the "NO" to HF. Six meters is also a "NO" for ionospheric skip. 2. Polarity of the signal for ground wave (not surface or space wave) is indeed important. Vertical polarization works best. Horizontal is rapidly attenuated. Bill, W6WRT |
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