George, Thank you for that amazing video. Fred KB4QZH
-------- Original message --------From: GEORGE WALLNER <aa7jv@atlanticbb.net>
Date: 3/14/20 12:25 AM (GMT-05:00) To: Mike Waters <mikewate@gmail.com>,
topband@contesting.com Subject: Re: Topband: Misek/Lankford Phaser 2 Project I
have built and tested Langford's Phased Delta Flag Array. It was very good. I
have built this antenna on a small, remote island in the Bahamas. I compared it
with a DHDL and a single flag (same dimensions as one of the elements of the
array).The antenna was very good. You can see and hear a drone-test of its
pattern on https://www.youtube.com/watch?v=JMujut_5FdY . I used a drone with a
low power transmitter flying around the antenna, more or less along a 1/2 mile
circle, with a receiver listening on the RX antenna array. The video starts
(and ends) in front of the antenna. You can hear the RX signal as it is being
received on a remotely operated Flex Radio receiver connected to the antenna.
Although not visible on the video, the front to back ratio shown on the
spectrum display of the Flex radio was about 25 dB (you can not hear the signal
off the back, even though the local noise is very low -- day-time, with the
nearest house about 10 miles away, and the nearest city, Nassau, about 100
miles away --- i.e. as low noise as you can get these days.)Bottom line: the
Phased Delta Flag Array was better than my DHDL, and, or course, better than a
single Delta Flag (one of its elements). But the difference was not large.
Later, I reconfigure the Delta flag into a four direction antenna (two delta
flags at 90 degrees, with direction selection like on a K9AY array). This
turned out to be a far more practical antenna than its phased, two element
predecessor. I think that a dual delta flag, with four directions is a pretty
decent RX antenna with a 60 x 60 foot foot-print and a single 30'
mast.73,George,AA7JV/C6AGUOn Fri, 13 Mar 2020 10:43:46 -0500 Mike Waters
<mikewate@gmail.com> wrote:>FYI, I just found this page with many Dallas
Lankford articles:>
https://www.okdxf.eu/index.php/technika/80-antenarska-kolekce-dallase-lankforda>
. Open the site in Chrome (or use translate.google.com), and it'll> translate
from Czech to English.>> On an old laptop here, I have many of his articles
downloaded from his old> kongsfjord.no site before they disappeared. They were
interesting to read,> but I never built any of his RX antenna arrays.> - Has
anyone else?> - If so, what is the RDF of his best design?> - And how to they
compare to a one-wavelength Beverage?>> 73, Mike> W0BTU>> This page has more
than just his amp but enough so you can>> > understand it.>> > If anyone has
an interest, I have some more files in my computer.>> >>> >>>>
https://www.okdxf.eu/lankford/Hi%20Z%20PPL%20Loop%20And%20Flag%20Arrays.pdf>>>
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