"topband"
Sent: Friday, April 8, 2022 5:57:03 PM
Subject: Re: Topband: Skirted vertical antennas for MF broadcast
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 w
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:
Frank
W3LPL
- Original Message -
From: "topband"
To: "Grant Saviers"
Cc: "topband"
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.or
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
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
See https://apps.dtic.mil/sti/citations/AD0693997
Sort of worthless as the takeoff angle snf gain is not as good as collinear
arrays or rhombics. 2:1 frequency at 75 ohms. Visible in pictures ot WW2
ship fore decks.
Jim/VEZ
On Thu, Apr 7, 2022 at 12:54 PM Kenneth Grimm wrote:
> The first
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 -
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
The design or at least many like it have been around for years.Otherwise known
as a Conical Monopole
73sBobG3REP
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
So top hats are now skirts.~ N8UX
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
>I'm surprised that the broadcast industry is just discoving [sic] this topic.
What makes you think it is just being discovered?
Rob
K5UJ
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
I have been using a similar antenna for 160m for several years.
I described it on my QRZ.com website.
Karel OK1CF
-Original Message-
From: Topband On Behalf Of
Joe
Sent: Thursday, April 7, 2022 5:44 AM
To: topband@contesting.com
Subject: Re: Topband: Skirted vertical antennas for MF
That's a very interesting antenna. I wish it had a spec of freq in the
drawing so it could be scaled to 160 or 80 meters.
Joe WB9SBD
On 4/6/2022 7:00 PM, Radio KH6O wrote:
I'm surprised that the broadcast industry is just discoving this topic. My
library of decades-old antenna handbooks
I'm surprised that the broadcast industry is just discoving this topic. My
library of decades-old antenna handbooks covers this quite well:
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