Half Size Dual Active Delta
Flag Arrays
The
half size active dual flag array antenna requires
only 30 meters of linear space, and so it is an
excellent choice for MW DXers with limited space
for antennas, says Dallas Lankford in his article.
Although small compared to previous high performance
MW antenna arrays, it is a state of the art MW receiving
antenna array, primarily because it uses true active
delta flag antenna elements.
To
the Article (January 7, 2012)
Testing of New Active MW
Antennas
Have
you ever compared a dual active delta flag array
to a terminated BOG when DXing mediumwave stations?
Tests conducted by Dallas Lankford showed that the
new dual arrays are superior to 1000 foot terminated
beverage antennas for MW DXing, and that the quad
arrays are more superior to 1000 foot terminated
beverage antennas for MW DXing.
To
the Article (November 22, 2011)
Comparing Loop Antennas
An
active loop antenna is a good choice for medium
wave and shortwave DXing if your space for antennas
is very limited. Guy
Atkins has compared RF PRO-1A, a new antenna
from Pixel Technologies, to Wellbrook Communications'
ALA1530 active loop antenna, which has been around
for years. He found a clear winner: the cheaper
one beat the more expensive one.
To
the Article (May 27, 2011)
Passive Loop Antennas
An
often-overlooked asset is a tuned passive loop used
to augment the primary loop antenna. A tuned passive
loop is readily available commercially, or one can
be made quickly by the home hobbyist. This article
(PDF) by Kevin Schanilec is a summary of several
techniques by which a tuned passive loop antenna
can help DXers solve common problems.
To
the Article (October 27, 2008)
DXing
'Over Your Shoulder' with Beverages
John
Bryant explains how he has used short unterminated
Beverage antennas successfully for 15 years. Such
wires are useable directional antennas with very
good lobes off of each end. The article
is available also as a PDF
version.
To
the Article (March 31, 2005)
Kiwa Mediumwave Loop Experiences
John
Plimmer bought a Kiwa mediumwave Loop from the
USA, but the performance of the loop was very disappointing.
After gathering dust for years, the loop was taken
to a DXpedition on the coast. Read
what happened.
To
the Article (March 22, 2005, edited on August
9, 2005)
RF Systems DX-1 Pro Active
Antenna
The
antenna is extremely quiet and seems to offer a
lot of suppression to local man made RF noise, whilst
at the same time being very sensitive. Sensitive
and quiet enough to get those very faint DX signals
from the corners of the globe. Read all about it
in John Plimmer's
article.
To
the Article (February 3, 2005)
9AY Loop for Mediumwave
What is the best way to improve
reception of mediumwave stations, if you have no room
for a beverage antenna? K9AY may be the answer. Check
out the articles:
Impressions
and a field test by Bjarne
Mjelde
Wellbrook
K9AY Antenna by John Bryant
Wellbrook
K9AY Antenna by Guy
Atkins, photos by Don Nelson
more photos of K9AY
EWE for Tropical Shortwave
How to improve reception
on tropical shortwave bands, if your space for antennas
is very limited? In his article The
Ewe in the Garden German DXer Michael
Schnitzer explains how to build EWE, a good
solution for the urban tropical bands DXer.
To
the EWE article
Impedance Transformers
A Second
Look at Fabricating Impedance Transformers for Receiving
Antennas (MS Word file) by John Bryant
Impedance
Matching Transformers for Receiving Antennas at Medium
and Lower Shortwave Frequencies (MS Word file)
by Bill Bowers, John Bryant and Nick Hall-Patch (also
available as a PDF
file)
Gain and Efficiency,
The Big Myth (also as an MS
Word file) by Tom Rauch
Other antenna articles:
Testing Two KAZ Squashed
Delta Antennas by John Bryant
Is Your Coaxial Lead-in
Actually an Antenna? (MS Word file, also as a
PDF file) by
John Bryant
Notes on using RG-174
Coaxial Cable at Medium and Lower HF Frequencies,
an article by John Bryant and Bill Bowers (also as
an MS Word or
PDF file)
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Review of PC-controlled Winradio
WR-G313e receiver
Winradio has recently introduced its latest PC-controlled
model WR-G313e, which is basically an external version
of an earlier WR-G313i receiver. For a DXer interested
in distant mediumwave and shortwave stations, G313e
turns out to be good value for money, says Mika
Mäkeläinen in his review.
To
the Article (November 27, 2005)
Icom IC-756
PRO III side by side with the Drake R8B
The bottom
line is this: is the Icom 756 PRO III worth double
the price of the Drake R8B? If you are a serious
DXer and have owned all the current offering of
receivers, you will find the latest technology in
the 756 very useful, says John
Plimmer in his comparison
test.
To
the Article (January 2, 2005)
Comparing Four Great Communications
Receivers
Testing the top receivers:
TenTec RX340, AOR AR7030, Racal RA1772 and Icom IC-R75.
Which of these fine communications receivers is the
best at locations with strong nearby transmitters?
Find it out in an article
(PDF) by Jan Alvestad.
To
the Article (PDF) (June 1, 2004)
Review of Icom IC-746Pro
Bjarne
Mjelde takes a close look at Icom IC-746Pro transceiver
as a mediumwave and shortwave receiver. Filters are
excellent, but how about sensitivity?
To
the Article (PDF) (Sept 2, 2004)
Review of AOR AR7030
All
you ever wanted to know about the performance of AOR
AR7030 written by Guy
Atkins, with measurements as well as detailed
information about the features and about the previous
discussion on the receiver.
To
the Article (January 12, 2004)
The AOR AR-7030 Tested
Against the Drake R8A
I feel a little intimidated doing this test, as the
AOR 7030 must be the most tested radio in the history
of the hobby. Every major magazine and authority has
tested and commented on it exhaustively. Some have
queried why the extreme hype over this radio? Find
out in John Plimmer's article
(also in MS
Word format).
To
the Article (1996/2005)
images
of JRC NRD-535 and 545 receivers
Pre-Amp Peregrinations
Adventures
with RF Pre-Amps by Advanced Receiver Research
and DX Engineering (also in MS
Word format), written by experienced DXers John
H. Bryant and Mark Connelly.
To
the Article (July 12, 2005)
Spend less and get the best splitters possible!
Rolling Your
Own: building antenna splitters that perform better
than most commercial units (also in PDF
format) by John Bryant and Bill Bowers.
To
the Article (January 31, 2005)
A Dummies' Guide
to
Working with Wall Warts (available also in MS
Word and PDF format)
by John Bryant is a guide of the simplest electronic
device that any of us possess: the ubiquitous "wall
wart" plug-in power supply. This is the seemingly
solid block brick that plugs into the AC mains electrical
wall outlet and provides DC power to various consumer
devices.
(Dec 28, 2004)
Comparing
Commercially Available Signal Splitters (also
in MS Word
format) by Bill Bowers and John Bryant
Audio Switching Network
by John Bryant
Rackmount
Equipment Cases for DXers, a 3.4 Mb downloadable
Powerpoint presentation by Guy Atkins
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