Out of curiosity... with so many narrow-pattern receive antenna configs,
how do typical contest stations check different directions after a CQ?
Listen on an omni antenna with one ear and a beverage with the other
ear. I originally switched beverages with a rotary switch. It
was a huge
The method I have used is similar to what Tom details in some respects.
The main RX is fixed in a prime direction, usually NE and later W.
However, the sub-RX is typically on auto-scan between transmissions
(controller detects PTT), hopping through antennas in a specific group,
either
The Wullenwever antenna was never a low-noise high performance antenna.
It was simply a system designed to find direction over a very wide frequency
range. The multitude of elements increased bandwidth, but the physical width
in wavelengths is the primary determinant of directivity.
While
Still more in Germany, there is a half one pointed to UA0 and still
in use:
http://goo.gl/maps/eXGtY
but wait, the next not far away is west of Flensburg just right at
the danisch border:
http://goo.gl/maps/05ufM
It is also still manned.
Who will find all of those impressive gadgets in
Hi Gary,
The University of Illinois research array in Bondville, Illinois was unique, it
used one hundred elements distributed equally around a 1000 foot diameter
circle. It was the first Wullenweber array built in the U.S.
The approach taken in the USSR was quite different, instead of
Questions about so called water proof connectors came up etc. As a
result, I will include a few things which should be good practice because
I discovered, for example, that everyone does not tape their connectors
when they are out in the weather. Also, just because a dealer says a
I was taught this kind of antenna during two semester course at radio
department of Lvov Polytechnic at the begining of 70's. A lot of formulas and
diagrams...
UA1DZ (SK) used this kind of array of 12 vertical elements on 20-10 meters.
Unfortunately no information except the vertical element
For those interested in technical details, following are links to manuals
providing theory of operation, design, construction and maintenace of the USN
FRD-10 Wullenweber array. Worthy of note is the very extensive and precision
ground mat and radial system used to obtain array stability,
I said:
The Wullenwever antenna was never a low-noise high performance antenna.
It was simply a system designed to find direction over a very wide
frequency
range. The multitude of elements increased bandwidth, but the physical
width
in wavelengths is the primary determinant of directivity.
There is one in Portugal also, dont remember how much is still standing,
havent been there for almost 20 years.
The US versions were the FRD-10 and the FLR-9 and built into the 70's and
the Japanese built a pair in the 80's and may still be using them.
Carl
KM1H
- Original Message
Hi Lee,
In an earlier post, W8JI stated that the Wullenwever antenna was never a
low-noise high performance antenna. Certainly that was true of the World War
II-era German Wullenwever, but the 1960s-era AN/FRD-10 and AN/FLR-9 and other
more recent Wullenweber-like arrays were definitely
Hi Peter,
Gablingen Kaserne looks abandoned, there's not a single car in the parking lot!
Not like in the good old days of the cold war in the 1970s and 1980s...
http://www.amerika-in-augsburg.de/index.php?id=1363
73
Frank
W3LPL
Original message
Date: Tue, 5 Feb 2013 16:14:28
Just a note to say that myself and Dick GU4CHY will be making the trip from
Guernsey to the USA and will be at the Friday night Top band dinner in Dayton
this year. Looking forward to some usual fun and seeing a few 160m friends.
73 Bob
GU4YOX
KX6N
Sent from my BlackBerry® device from Cable
For those of you planning on putting in big ground radial systems, you might
want to buy your wire sooner than later. Either that or hedge your cost by
investing in copper futures! See link below:
http://seekingalpha.com/article/1160971-kevin-puil-4-lb-copper-is-on-its-way
73, Dennis W0JX/8
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