Essentially all 1920s AM broadcast stations used roof top antennas
until the 1/4 wave vertical with 120 1/2 wavelength radials became
the standard in the 1930s
73
Frank
W3LPL
- Original Message -
From: "Hamilton Hicks,Jr"
To: "Mark" , "Kenneth Grimm"
Cc: "topband"
Sent: Friday, April
Some years ago, I recall an AM station in Washington, DC, having their tower
on the roof of a three story building. It was either a unipole or had skirted
radials. I want to say that it may have been1340 khz.
HamKB4BR
On Thursday, April 7, 2022, 12:54:47 PM EDT, Kenneth Grimm
wrote:
Top hats could be skirts if you feed the antenna through them.
This design looks a lot like a “conical monopole”. Is there a distinction?
Terry N6RY
> On 2022 Apr 7, at 3:38 AM, Rich Dailey, N8UX
> wrote:
>
> So top hats are now skirts.~ N8UX
> _
> Searchable Archives:
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
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 wrote:
> I
I have been using at C6AGU a similar design that I call "Fat Vertical".
Scroll down on the C6AGU QRZ.com page to see a picture of it. The antenna is
60' tall with sloping loading wires attached to the outer corners of the
"fat wires". Feed point impedance is 12 - 120 Ohms, which is matched by a
