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Title: Vertical antenna performance Post by: W5UF on April 15, 2022, 12:23:34 PM I came across this discussion on vertical antennas and thought it might be useful to someone planning a new antenna. I can attest to the performance of a quarter wave vertical with 4 radials built on a wooden swing up A-frame tower elevating the vertical about 20 ft at base.worked fantastic DX. BEST antenna I ever had.
There was a W3 maybe W3BC his last name was Wolfe or Wolf, maybe Ben Wolfe, I used to hear him during the late afternoon about 4 P.M. when I was sailing on the East Coast of USA, day after day working European stations one after another. I was 300 miles out to sea, so I was closer to Europe but he was working them easily, just like I could sitting out on salt water with a full sized quarter wave vertical mounted on the top deck of a tanker. I was intrigued, I called him, he was using a full sized vertical mounted on the apex of his garage with three elevated resonant radials elevated 7 to 8 feet. He told me that elevated radials were far more efficient than even the classic 120 broadcast standard radial pattern. I later was told that in his younger days, Ben worked for FCC and was the engineer responsible for that 120 radial standard. The common denominator is coverage, 3 radials in the air provide a ground return just like 120 radials buried in soil because there's no competition 8 feet up in the air. Title: Re: Vertical antenna performance Post by: DMOD on April 15, 2022, 12:54:00 PM I came across this discussion on vertical antennas and thought it might be useful to someone planning a new antenna. I can attest to the performance of a quarter wave vertical with 4 radials built on a wooden swing up A-frame tower elevating the vertical about 20 ft at base.worked fantastic DX. BEST antenna I ever had. There was a W3 maybe W3BC his last name was Wolfe or Wolf, maybe Ben Wolfe, I used to hear him during the late afternoon about 4 P.M. when I was sailing on the East Coast of USA, day after day working European stations one after another. I was 300 miles out to sea, so I was closer to Europe but he was working them easily, just like I could sitting out on salt water with a full sized quarter wave vertical mounted on the top deck of a tanker. I was intrigued, I called him, he was using a full sized vertical mounted on the apex of his garage with three elevated resonant radials elevated 7 to 8 feet. He told me that elevated radials were far more efficient than even the classic 120 broadcast standard radial pattern. I later was told that in his younger days, Ben worked for FCC and was the engineer responsible for that 120 radial standard. The common denominator is coverage, 3 radials in the air provide a ground return just like 120 radials buried in soil because there's no competition 8 feet up in the air. Elevated radials need to be tuned to be effective counterpoises. The RCA engineers who came up with the 120 ground radials for AM broadcasting was G.H. Brown, R.F. Lewis, and J. Epstein. in GROUND SYSTEMS AS A FACTOR IN ANTENNA EFFICIENCY, Proceedings of the Institute of Radio Engineers, Volume 25, Number 6 June, 1937. Phil - AC0OB Title: Re: Vertical antenna performance Post by: W7TFO on April 15, 2022, 04:46:44 PM Maybe Ben Waple?
He signed my 2nd fone ticket. 73DG Title: Re: Vertical antenna performance Post by: flintstone mop on April 15, 2022, 05:03:47 PM oh YA !!! Elevated vertical and Elevated radials becomes lethal.
If this transitory inflation continues I cannot afford to mess around with an inverted "L" with a elevated folded counterpoise. It needs a special balun, which I have. Buying 200 feet of #12 bare copper and ripping down a perfectly working VEE is not in the tea leaves. It was a madness that I abandoned last summer. "Ls" are very good for distance and close in 160M AM. Many good signals this past winter from ops using inverted "Ls" fred Title: Re: Vertical antenna performance Post by: KA3VID on April 16, 2022, 09:35:42 AM oh YA !!! Elevated vertical and Elevated radials becomes lethal. That's what I use for my meager pw station and have not been disappointedIf this transitory inflation continues I cannot afford to mess around with an inverted "L" with a elevated folded counterpoise. It needs a special balun, which I have. Buying 200 feet of #12 bare copper and ripping down a perfectly working VEE is not in the tea leaves. It was a madness that I abandoned last summer. "Ls" are very good for distance and close in 160M AM. Many good signals this past winter from ops using inverted "Ls" fred actually I've been rather impressed. |