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Author Topic: Dipole vs Vertical: Which Antenna is Better?  (Read 1327 times)

Offline ThaDood

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Dipole vs Vertical: Which Antenna is Better?
« on: November 16, 2023, 2009 UTC »
I guess that this can go here.   https://www.onallbands.com/dipole-vs-vertical%EF%BB%BF-which-antenna-is-better/   Tim, K8RRT shared that. Me??? I've done the best of both worlds, Vertical Dipoles.
Over the years I have to admit coming up with some no-so good ideas for products. The Skipping Cassette Decks, (In case you missed record skipping.), never took. Water Resistant Lollipops never caught on either, even though you could enjoy those in the rain and in the shower. Then, there's the Anatomically Correct Mrs. Butterworth Syrup Dispenser. (Just guess where the syrup came out of.) Nope, no takers.

Offline ChrisSmolinski

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Re: Dipole vs Vertical: Which Antenna is Better?
« Reply #1 on: November 17, 2023, 1517 UTC »
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
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Online Ray Lalleu

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Re: Dipole vs Vertical: Which Antenna is Better?
« Reply #2 on: November 18, 2023, 1517 UTC »
That image of antenna tower in fire looks like the result of an anti-waves militant attack.
Several attacks of this type in France, against cell phone towers and radio-TV towers in the last few years.
Some of those dumb militants even accused the all-new 5G network to be the cause of the pandemy!
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Offline RobRich

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Re: Dipole vs Vertical: Which Antenna is Better?
« Reply #3 on: November 18, 2023, 1845 UTC »
Unless looking for NVIS at lower frequencies, a horizontal at approximately 1/2' wavelength above moderate to decent ground can return up to ~8.5dBi of gain. The problem for lots of us is getting a lower HF horizontal dipole for 160/80/40 that high, even if perhaps having the space lengthwise.

That said....

Want a ground-mount HF vertical without the huge radial field? Make the vertical a halfwave fed at the base with with a 49:1 or 64:1 unun. Now all ya' need is a few very short on-ground radials (and/or common-mode on the feedline) to satisfy Kirchhoff's first law.

If antenna height is an issue, as a halfwave on even 40m is ~66', look into deploying the halfwave as described above instead as an inverted-L. It might need a little tweaking to the length and/or unun ratio, but either seems easier than deploying dozens of ground radials IMO.

Alternatively, raise the vertical and use a couple or more elevated tuned radials. I keep meaning to add those to my elevated 31' vertical for improved ~7MHz tuning, but it is a receiving antenna, so it is just grounded to the existing mast and guys for now. If I raised it higher, I could actually even use tuned guys as elevated radials.
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