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Beyond the Basics
You have copied most of the clear channel
stations available in your area. So now you have logged WMAQ, WLW, WSM, WABC,
CBM, WBZ and other clears and maybe received a few QSL cards or letters in the
process. Now what? The next step could be to start with the regional or local
channels, upgrade your medium wave equipment, move over to
shortwave listening (SWL) or all of the
above.
Beyond The Clears
Logging medium wave stations on the regional or local
frequencies can range from ridiculously easy to extremely challenging. See the
section The Medium Wave Band Plan to
review how these frequencies are allocated. Clear channel frequencies also
have many lower power stations that you can log.
This is the time to review once again where
your local stations are located. As listening conditions change, and stations
switch to night time power and antenna patterns, a local station (within a
radius of 100 Km.) can sound like distant DX. Even though this station might
have been quite clear during the day, its signal may change considerably and
even disappear at night.
Using one of the station guides becomes
essential as you move to this level of medium wave DX. Knowing what to listen
for can be a real help when trying to identify a DX station. Often you will
hear two or three or more stations on a frequency and using a directional
antenna or a least rotating your receiver may be necessary to receive one of
these signals and null the others.
The process of nulling a signal can be
important when you are trying to receive another. Say you are trying to
receive 1270 WTSN Dove, NH which is generally to the east from the Toronto
area. Also on 1270 is WHLD in Niagara Falls, NY which is to the south. A
receiver with a built-in loop antenna can be rotated so that its maximum
signal reception is to the east. While maximizing your signals to the east you
are nulling or minimizing signals from the south. Signals to the west will
also be maximized while signals to the north will be nulled.
 Figure 1. Nulling a signal.
Coping with Fading
A common characteristic of DX listening is the
fading in and out of a station's signal. This can be frustrating when trying
to record program content for creating a reception report. Just keep in mind
that when a signal fades out it will usually fade back in again. It's just a
matter of waiting. Sometimes for a few minutes or less. Other times a fade can
be deep and take much longer for the station to return.
One of the positive aspects of fade, is that
when one station fades out another may fade in. This gives the opportunity to
record two stations. There is of course the possibility of confusing the
program content of one for the other. This is where you need to pay attention
to the type of program: one may be a talk show and the other C&W music.
Also local content, such as commercials for local businesses, the weather,
it's unlikely to be 75 degrees in Winnipeg in December, can be helpful
indicators of the station you are hearing.
So much of DX listening is technique. But
having better equipment can also make a big difference in your listening
success.
Upgrading the Equipment
A quality receiver can make a huge difference
in separating out the DX stations that you are hearing. If your goal is to
stay with medium wave DX then a receiver such as the GE Superadio III is an
excellent AM receiver. For well under $100 new you will have a receiver with
above average AM sensitivity and a high quality built-in loop antenna as well.
If you plan to also get into shortwave
listening then communication receivers such as the Sony ICF 2001, Drake SW8
and R8A, Lowe HF150 are recommended. The author has used a Sony ICF SW-55 with
good success for both medium wave and shortwave listening. There are many
receivers available in this category with a wide price range to fit most
budgets. If you are a budding Ham and plan to get your amateur license then
you might consider an HF Ham transceiver. Most transceivers today include
wideband receive which includes the medium wave AM band. The author uses his
Yaesu FT-990 for really serious DXing, even for the AM broadcast band where
international stations have been received.
Most of the communication receivers either
require an external antenna or will exhibit improved reception with one. On
medium wave an external antenna does not necessarily mean an outdoor antenna.
However, an outdoor antenna made of a single wire 15m (50 feet) or longer run
between the house and a tree or between trees can be a great help. Connect an
insulated lead to one end of the antenna and run it indoors to your receiver.
If your receiver doesn't have an external antenna connection just wrap a few
loops of the lead in wire around the receiver itself and check the improved
signals.
External air-core or ferrite loops can make a
big difference in medium wave reception. This is partly due to the gain in
signal strength they provide and also because of their directional properties.
Commercial antennas from companies such as Kiwa Electronics, Palomar
Engineers, or Radio West are in this category. You can also build your own
with plans available from the National Radio Club. If you plan on serious
DXing one of these antennas is virtually a must.
As a Web surfer you might also do some Web
searches for additional articles on DXing. There are numerous sites that
contain information that can enhance your listening so log onto some of the
sites listed in the section Medium
Wave Resources for additional addresses on the Internet to help you in
your quest for those DX stations.
Text © 1999 - 2007 Don Cassel VE3XD You can e-mail me at
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