MT Express Sample Low Resolution Issue ... - Monitoring Times
MT Express Sample Low Resolution Issue ... - Monitoring Times
MT Express Sample Low Resolution Issue ... - Monitoring Times
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Table 1: Shortwave Broadcast Bands<br />
TenTec RX-340 HF DSP Receiver is the top of the line for SWLers with unlimited budgets. Here’s<br />
a surprise, it’s made in the U.S.A.! (Courtesy: Ten-Tec)<br />
web site e-ham.net. Specific reviews from<br />
individuals are found at http://www.eham.<br />
net/reviews/products/8. Keep in mind that<br />
these are personal opinions from individuals<br />
which may not represent general opinion.<br />
Still, they may be worth reading.<br />
One thing you’ll notice is that the<br />
cheapest radios have old-fashioned analog<br />
tuning. This keeps down production costs<br />
but gives these radios a number of drawbacks.<br />
It’s hard to tell exactly where you<br />
are on the bands with this type tuner, the<br />
numbers are often hard to read without a<br />
magnifying glass, and there’s no way to<br />
have pre-set memory banks for instant access<br />
tuning. The price of a SW radio goes up<br />
as options are added. Here are some “must<br />
haves” that you should look for in a serious<br />
shortwave radio:<br />
• External antenna connection. Allows<br />
attachment of an external antenna or<br />
other accessory such as a pre-selector<br />
or antenna tuner.<br />
• Digital frequency readout with keypad<br />
entry and a reasonable amount of<br />
memory pre-sets. This display should<br />
also include some type of signal strength<br />
meter.<br />
• Sideband reception capability. Allows<br />
tuning amateur radio transmissions<br />
in upper or lower sideband as well as<br />
digital modes which also use sideband<br />
transmissions.<br />
• Wide/Narrow switch provides better<br />
audio for international broadcasters<br />
and helps sideband transmission sound<br />
better.<br />
• Built-in 24 hour clock. Can be set to<br />
UTC so you’ll know when to tune into<br />
programs you see in the guide.<br />
• External speaker connection allows use<br />
of an external speaker to improve audio<br />
quality or to be used with an external<br />
tape recorder.<br />
Shopping for a Radio<br />
Once you’ve narrowed the field of<br />
receivers you’d like to buy and have read<br />
the reviews, it’s time to do a little shopping.<br />
Radio Shack used to be a good place to<br />
check out shortwave radios. They carried<br />
a wide range of models and had stores in<br />
nearly every town. Now, they are reduced<br />
to offering only three shortwave products,<br />
all made by Grundig and ranging from the<br />
M100 for $30 to the Digital Compact for<br />
$80. That leaves the mail order houses as<br />
your best bet for price comparisons. Here’s<br />
a round-up of these vendors, the brands<br />
they carry and other shortwave accessories<br />
of note. They are arranged in alphabetical<br />
order:<br />
Amateur Electronic Supply: 800-558-0411<br />
http://www.aesham.com offers AOR,<br />
Drake, Sangean, Sony, & Yaesu brands.<br />
Has accessories and cable.<br />
C. Crane Co.: 800-522-8863 http://www.<br />
ccrane.com Offers CCRadio Plus, Icom<br />
and Sangean brands. Has portable antenna<br />
& longplay recorders.<br />
Grove Enterprises: 800-438-8155 http://<br />
grove-ent.com Offers AOR, Drake,<br />
Grundig, Icom, JRC (Japan Radio Corp.),<br />
Sangean, Yaesu and WiNRADiO. Sells<br />
outdoor and indoor antennas, cables<br />
and preselectors, books, and <strong>Monitoring</strong><br />
<strong>Times</strong> subscriptions.<br />
Universal Radio 800-431-3939 http://<br />
www.universal-radio.com Offers<br />
Drake, Grundig, Icom, JRC, Sangean,<br />
and Ten-Tec brands. Also sells many<br />
SWL accessories including antennas,<br />
preselectors and books.<br />
The Computer-hosted<br />
Receiver<br />
There’s another type of SW receiver<br />
on the market, a “virtual” receiver which<br />
uses your computer to display a radio control<br />
panel that you would tune as any other<br />
receiver. The audio comes through your<br />
computer as well. The receiver is a box or a<br />
circuit board which interfaces between your<br />
antenna and your computer. Advantages of<br />
this type of receiver is that it has the features<br />
of radios many times the price. The<br />
disadvantage, of course, is that it depends<br />
on your computer for its existence. If your<br />
computer goes down, your radio goes with<br />
it. One such computer-based receiver is the<br />
Ten-Tec RX-320D which is widely available<br />
and sells for $328.95.<br />
Another such receiver is the WinRA-<br />
DiO 1500 series, available through the<br />
Grove catalog, which offers a wide tuning<br />
range (150 kHz to 1.5 GHz with cell phone<br />
frequencies blocked) and also features<br />
performance and extras you’d expect from<br />
a more expensive “real” radio. Or, the new<br />
Courtesy <strong>Monitoring</strong> <strong>Times</strong><br />
Freq kHz Meter Band<br />
2300-2495 120 meters (Note 1)<br />
3200-3400 90 meters (Note 1)<br />
3900-3950 75 meters (Regional band,<br />
used for broadcasting in<br />
Asia only)<br />
3950-4000 75 meters (Regional band,<br />
used for broadcasting in<br />
Asia and Europe)<br />
4750-4995 60 meters (Note 1)<br />
5005-5060 60 meters (Note 1)<br />
5730-5900 49 meter NIB (Note 2)<br />
5900-5950 49 meter WARC-92 band<br />
(Note 3)<br />
5950-6200 49 meters<br />
6200-6295 49 meter NIB (Note 2)<br />
6890-6990 41 meter NIB (Note 2)<br />
7100-7300 41 meters (Regional band,<br />
not allocated for broadcasting<br />
in the western<br />
hemisphere)(Note 4)<br />
7300-7350 41 meter WARC-92 band<br />
(Note 3)<br />
7350-7600 41 meter NIB (Note 2)<br />
9250-9400 31 meter NIB (Note 2)<br />
9400-9500 31 meter WARC-92 band<br />
(Note 3)<br />
9500-9900 31 meters<br />
11500-11600 25 meter NIB (Note 2)<br />
11600-11650 25 meter WARC-92 band<br />
(Note 3)<br />
11650-12050 25 meters<br />
12050-12100 25 meter WARC-92 band<br />
(Note 3)<br />
12100-12600 25 meter NIB (Note 2)<br />
13570-13600 22 meter WARC-92 band<br />
(Note 3)<br />
13600-13800 22 meters<br />
13800-13870 22 meter WARC-92 band<br />
(Note 3)<br />
15030-15100 19 meter NIB (Note 2)<br />
15100-15600 19 meters<br />
15600-15800 19 meter WARC-92 band<br />
(Note 3)<br />
17480-17550 17 meter WARC-92 band<br />
(Note 3)<br />
17550-17900 17 meters<br />
18900-19020 15 meter WARC-92 band<br />
(Note 3)<br />
21450-21850 13 meters<br />
25670-26100 11 meters<br />
Notes<br />
Note 1 Tropical bands, 120/90/60 meters<br />
are for broadcast use only in designated<br />
tropical areas of the world.<br />
Note 2 Broadcasters can use this frequency<br />
range on a (NIB) non-interference basis<br />
only.<br />
Note 3 WARC-92 bands are allocated officially<br />
for use by HF broadcasting stations<br />
in 2007. They are only authorized on a<br />
non-interference basis until that date.<br />
Note 4 WRC-03 update. After March 29, 2009,<br />
the spectrum from 7100-7200 kHz will no<br />
longer be available for broadcast purposes<br />
and will be turned over to amateur radio<br />
operations worldwide