Then there is this 825 foot VLF umbrella antenna installed in 1912 on Radio Road in Little Egg Harbor, NJ. At the time it was the second tallest structure in the world, second only to the Eiffel tower.
The tower was demolished in 1955, but the three massive 20 foot tall concrete guy anchor blocks, the transmitter building and the chimney were never been removed. https://weirdnj.com/stories/tuckerton-tower-mystic-island-monoliths https://goo.gl/maps/i2w3VY1a3uoYdZWj7 https://goo.gl/maps/asrhsdA7YLi8PLpG9 https://goo.gl/maps/538T3vECLhBQ81Z99 https://goo.gl/maps/usStnh8nwJNUVsB97 73 Frank W3LPL ----- Original Message ----- From: "topband" <[email protected]> To: "Grant Saviers" <[email protected]> Cc: "topband" <[email protected]> Sent: Friday, April 8, 2022 3:22:24 PM Subject: Re: Topband: Skirted vertical antennas for MF broadcast And then there is this: https://en.wikipedia.org/wiki/Umbrella_antenna#/media/File:Main_antenna_feed_Anthorn.jpg If you had one of these in your backyard, I am sure the entire state would decide it was causing TVI. 19.6 khz. Jim 'VEZ On Thu, Apr 7, 2022 at 8:19 PM Grant Saviers <[email protected]> wrote: > I think the disc-cone is a close relative. There is one of these on the > bow of the Iowa BB in Long Beach. During a tour by W6HB, I was told > they would have 25+ full duplex TTY circuits open at one time on this > and 4 whip antennas mounted on the superstructure. > > Another piece of battleship antenna trivia is how they patterned > antennas without any of the computer techniques now available. They > made about an 8ft long fully detailed model in brass and excited > antennas under test at UHF+. > > Grant KZ1W > > On 4/7/2022 09:44, Kenneth Grimm wrote: > > The first time I saw one it was called the Folded Umbrella and was > > popularized by the late WB5IIR, John Haerle. He wrote an article for HR > in > > May of 1979. He also described it in his book, "The Easy Way." I've > been > > using my own version of the basic design on 160 for several years. > > 73, > > Ken - K4XL > > > > On Thu, Apr 7, 2022 at 12:24 PM Mark - N5OT <[email protected]> wrote: > > > >> Conical Monopole > >> > >> Say that fast 3 times: > >> > >> Conical Monopole > >> Conical Monopole > >> Conical Monopole > >> > >> Right. The first time I saw one, it was called a Folded Unipole. My 160 > >> support can be probably 80' or 24 meters. I have considered my options > >> for broad-banding it for 160. This is one of the choices. > >> > >> Mark N5OT > >> _________________ > >> Searchable Archives: http://www.contesting.com/_topband - Topband > >> Reflector > >> > > > > > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband > Reflector > _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
