Posted: 7/10/2015 1:24:10 AM EDT
| I have a G5RV as my primary antenna. Using a 857 and a tuner as well. I've worked the world with it. Especially Europe and Russia. I have it running east and west. I've heard from some that if it's running east and west then the antenna radiates north and south. I've also heard if it's east and west then that's how it radiates. I seem to believe the latter because I have no problem hearing and working stations in Europe but I have a hard time with hearing and contacting stations in South America. I mean I worked Kuwait the other night but I can barely get the Dominican Republic. Thanks. |
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Standard size G5RV is a little over 100' long it looks like.
So, 40 meters or lower in frequency, max signal would be broadside. Once the total length of a monopole (or 2x that size if a dipole) goes beyond 5/8 wavelength, the signal pattern is no longer broadside to the element. So on 20 meters or higher, the antenna pattern becomes multi-lobed, with main lobes off the ends of the antenna. As a guess, on 20 meters the main lobes would be peaked probably 30 to 45 degrees from the tips of the dipole. As frequency goes up, the main lobes will get closer to the ends of the dipole, and more minor lobes will appear. |
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Here are some plots of the antenna's patterns on the various bands:
From the radioqrv.com page, the patterns in free space (with left/right being "broadside" ): 
From the page, qsl.net the patterns over ground at typical elevations (with "up/down" being broadside): 
(Careful with the qsl.net page, there are a few innacuracies in the write-up!!!...like "Do not feed this antenna with a balun!" - which of course is not correct - G5RV should be fed with a balun, or more accurately, a choke.) |
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Quoted:
All of that should be taken with a grain of salt as well, as your local environment and how the antenna is installed will affect those patterns. But it does give you a rough idea of what you should expect. Yep...hard to spin a 130ft antenna to check your lobes!!! |
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Quoted:
Yep...hard to spin a 130ft antenna to check your lobes!!! Quoted:
Quoted:
All of that should be taken with a grain of salt as well, as your local environment and how the antenna is installed will affect those patterns. But it does give you a rough idea of what you should expect. Yep...hard to spin a 130ft antenna to check your lobes!!! Yup. I have G5RV Jr, and did a bunch of modeling. All those models told me I should have good gain/lobes/etc into the NE US and europe. In fact my terrain to the the north is very favorable. To the south I have a giant hill, particularly to the west. Turns out on most bands I have a booming signal into AZ of all 'ing places. None of the lobes point there generally speaking and there is giant 'ing hill in that direction. So, something is distorting my pattern rather severely. |