Topband: Skirted vertical antennas for MF broadcast

[Frank W3LPL]

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" <topband at contesting.com>
To: "Grant Saviers" <grants2 at pacbell.net>
Cc: "topband" <topband at contesting.com>
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 <grants2 at pacbell.net> 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 <r-emails at n5ot.com> 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
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> >
> >
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