9W2TBC (Ayie) telah mewakilkan Alam Damai Radio Amateur Community (ADARC) untuk menjemput semua peminat radio amatur dan keluarga terutamanya yang berada di Lembah Klang untuk menghadiri majlis perkahwinan beliau pada:-
What is DX'ing?
DX'ing is the hobby of listening for distant radio or TV transmissions. You can "DX" AM, FM, TV, shortwave, scanner frequencies, longwave, amateur radio bands, and more. "DX" has a more specific meaning to amateur (ham) radio operators. To them, DX literally refers to amateur radio transmissions from foreign countries.
Why do people DX?
There are MANY reasons to DX!
What is the difference between MW, AM, and BCB DX'ing?
AM, BCB, and MW DX'ing are the same thing. MW stands for Medium Wave, and refers to frequencies between about 500 KHz and 2000 KHz. The term "medium wave" makes sense when thought of in context with Short Wave and Long Wave. Literally, MW has wavelengths considered to be of medium length (160+ Meters).
The term AM, however, is actually less precise of a definition of the band than MW. AM is actually the type of modulation used by most radio stations in the MW frequency range. For this reason, people refer to the band as the AM band. Of course, AM (amplitude modulation) could be used in ANY frequency range, including within the "FM" band (88-108 MHz in North America).
BCB stands for "broadcast band". This term is a little more antiquated, having it's start back before FM radio existed. At that time, only one broadcast band existed - the AM or MW band.
So, usually people referring to "AM", "MW", or BCB DX'ing are referring to DX'ing the same band - 530-1710 KHz in North America.
What equipment do I need to DX?
Great DX enjoyment can be achieved with very modest equipment. One can DX the AM or FM bands with car radios and simple portable radios to some degree of success. Many older inexpensive FM tuners and TV's outperform the models of today, as well. You might also consider trying out your VCR's tuner for TV DX. It's not uncommon for many VCR's to outperform TV's when it comes to DX - especially if you can disable the low signal "blue screen" function.
While great enjoyment can be had with inexpensive radios and TV's, many DX'ers buy high end communications receivers to help receive more exotic DX. These types of receivers are virtually required for shortwave and longwave DX, but can also aid the AM/MW DX'er. There are many competitors in this market, so check out your local amateur radio store. As a starting point, look for Icom, Kenwood, Drake, NRD, and other brands. Specifically, todays most popular DX receivers include the Drake R8B, Kenwood R-1000 and R-5000, Icom R-71A and the Icom R-70, among others.
And any DX'er can improve their setups with better, and usually bigger, antennas. Antenna design and size vary greatly depending on the band you're interested in. Here are some antenna types to look for:
UHF: Parabolic dishes are the best; large "yagi" antennas also work well. These require a rotator.
FM/VHF: Yagi antennas dominate. They are relatively small and directional, so will require a rotator.
HF/SW: A simple dipole can achieve great results, as can a tuned random length wire. Yagi's also exist, but are very large.
AM/MW: Loop antennas are great - small, directional, and indoors. "Beverage" wire antennas are the ultimate, but require 800+ feet of level/straight terrain.
LW: Wire antennae and loops also work in this range.
If you really have a lot of time, space, and money, elaborate antenna arrays can be assembled. These often consist of multiple conventional antennae connected to an electronic phasing unit. These phasing units allow you to literally phase the received radio waves in a manner that either amplify potential DX or "null" interfering stations.
How do I know what I'm listening to?
Several guidebooks and reference books exist, as do many online resources. Check the AM DX Reference and FM DX Reference for many. Also look into joining a club relevant to the band that interests you. A good overview book including AM, shortwave, and more radio station listings is the annual "Worldwide Radio and TV Handbook", or WRTH for short. Check amazon.com for details.
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services, Citizens' Band channels are shared by many users. Only one station may transmit at a time. Other stations must listen and wait for the shared channel to be available.
Over time, several countries have created similar radio services, with varying requirements for licensing and differing technical standards. While they may be known by other names, such as General Radio Service in Canada, they often use similar frequencies (26 to 28 MHz), and have similar uses, and similar difficulties with antennas and propagation. Licenses may or may not be required, but eligibility is generally simple.
Some countries have personal radio services in the UHF band, such as the European PMR446 and the Australian UHF CB. Like the American FRS and GMRS services, these are more properly covered in their own articles, as much of this article is specific to the antenna and propagation of the upper HF and lower VHF bands.
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Tahniah kepada 9W2SAQ yang telah dapat cahaya mata baru pada 25 Disember 2009 yang lalu. Baby selamat dilahirkan pada jam 4.13pm dengan berat 3.52kg dan dinamakan Qasdina Isyah Sofiya binti Zulfadhli.
