Sorry, the invention was in 1938 and the patent issued 1941
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of JC
Sent: Tuesday, December 13, 2016 6:28 PM
To: 'Don Kirk' ; 'Mark Connelly'
Cc: 'topband'
Subject: Re: Topband: Bowtie Flags
Hi Mark
Termin
Hi Mark
Terminated loops are very old, the first patent belongs to Harold Beverage
Harold Beverage invented wide band receiver antenna, loaded loop in 1941
https://docs.google.com/viewer?url=patentimages.storage.googleapis.com/pdfs/
US2247743.pdf
Most variations of this kind of antennas like t
Mark’s observation feeds my skepticism of a bowtie vs a flag in the specific
circumstance where a ground independent RX antenna is your only option.
A bowtie would be about half the capture area of an equivalent “box” flag and
consequently at a immediate disadvantage. If I was going to replace t
Earl, K6SE (sk) advanced loop antennas on 160 meters. For
information-See Page 34, July 2000 QST magazine.
The small 160 meter bandwidth allows loop optimization k6SE gives
dimensions.
George Walter AA7JV helped the TX3A Chesterfield DXpedition group
with interconnected two half
Hi Mark,
I had no idea a terminated bowtie previously existed, but does not surprise
me.
Thanks for posting.
Don
On Tue, Dec 13, 2016 at 2:00 PM, Mark Connelly via Topband <
topband@contesting.com> wrote:
> As Nick undoubtedly knows, Bowtie antennas have been in use by medium wave
> broadcast b
As Nick undoubtedly knows, Bowtie antennas have been in use by medium wave
broadcast band DXers for some time now.
One I tested here in 2010 is shown in this sketch:
http://www.qsl.net/wa1ion/pictures1/bowtie_s_yarmouth.gif
Some use a dual feedline scheme so the pattern can be reversed. This wo
Hi Nick
I would say grounded both ends, don't need to be connected to the antenna
itself, right.
JC
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Nick
Hall-Patch
Sent: Tuesday, December 13, 2016 11:42 AM
To: JC
Cc: 'topband'
Subject: Re: Topband
So, is the ground wire just left "floating", JC?No electrical
connection to the antenna itself?
Thanks and 73,
Nick
VE7DXR
At 11:23 13-12-16, JC wrote:
Hi Nick
The wire will reduce loss on the transmission line given a better match and
phase. In practice you can see change on the SWR a
Hi Nick
The wire will reduce loss on the transmission line given a better match and
phase. In practice you can see change on the SWR and front back. If you have
a good ground you probably won't see anything changing.
Regards
JC
-Original Message-
From: Nick Hall-Patch [mailto:n...@ieee.