The Worldwide TV-FM DX Association Website
Here's another new SDR that's worth taking note of. This new SDR covers 100khz through 2ghz and displays up to 8mhz of spectrum at a time, which is perfect for FM DXing.
Using SDR# software not only can you view the spectrum and tune it, you can record either audio or up to 8mhz of spectrum for playback later using an external hard drive. This feature is especially helpful during E skip openings where many IDs, etc would be missed.
SDRPlay is now supported by both SDR# and SDR Radio Console! See our review for a screengrab of SDR Console when used with SDRPlay along with download information.
You can now download the 2009 Emisoras de FM by Jim Thomas in three parts: MEXICO, CENTRAL AMERICA and CARIBBEAN areas. You can also download the complete 100 page 2010 Emisoras de FM. This publication is no longer in print. Also remember that up-to-date listings for Mexican FM stations can be found at our WTFDA US/CANADA/MEXICO FM Station database.
WTFDA presents a randomly selected group of articles for your reading pleasure. These may change from time to time so if you find something you enjoy, be sure to grab it.
Posted by Admin | February 25,2014
SDR stands for Software Defined Radio and SDRs have become very popular with DXers. An SDR usually consists of a radio in a black box that attaches to your computer with a USB cable and is tuned with software on your computer monitor. AM Dxers have been using them for a few years. A few SDRs that come to mind are the SDR-IQ, Perseus and Winradio Excalibur. Many AM DXers use these models.
FM DXers have been left out in the cold until now. The word on the street is that there's an SDR that's the equal of a modified Yamaha T85 tuner. This SDR is called the Elad FDM-S2. It covers longwave through 150mhz. Tests have shown it to be excellent for FM DXing with no overload in locations close to FM transmitters.
To read more about it go to http://ecom.eladit.com/ELAD-FDM-S2
To read one DXers experience with the S2, read here.
There's another SDR under development that also covers FM. It's called AirSpy and can display a good chunk of the FM spectrum using SDR# software. It also should be more affordable than the Elad SDR. Note: 10/16/14 This SDR project is completed and the first units shipped in mid-November. If you've purchased one and used it for FM Dxing, let us know and we'll post a review of your observations.
To read more about Airspy, go to http://airspy.com/
So far we can say that the 2015 E-Skip season was better than last summer for most of us, but how much better is debatable. The month of May was a washout. The month of June was a washout except for the last two weeks of the month when a few good openings occurred and quite a few FM Dxers were treated to double hop Es from Mexico City and other parts of Mexico. A WTFDA member in Ohio caught Guatemala on lowband TV. A WTFDA member in SC who is an FM Dxer caught 2,000 mile double hop FM skip to Bogota, Colombia and another WTFDA member in Ontario captured a couple of photos of Mexican double hop TV skip in July, a month that is becoming lackluster with few Es openings observed. As we write this in the middle of July, the season (if you can call it that) is winding down and we may be treated to one or possibly two more Es openings if we are lucky.
Above is a screengrab of XEWO-2 Guadalajara, MEX as seen by Bill Hepburn on July 14th, 2015. Bill may be the last person to DX this station before analog TV shuts down in Mexico by the end of the year.
If you are a WTFDA member, we send you the VHF-UHF digest every month, but we can't send it to you if we don't have your correct email address. If you change your email address, please mail or email us with the updated info so we can continue to send you the VUD every month.
Everybody wants to know what types of equipment TV DXers use in their hobby for best results. We've asked around for info on the best CECBs (set top boxes) and DTVs. Top DTV Dxers agree that the manual tuning of RF channels with up/down buttons is a must! Unfortunately, most DTVs don't allow it. A few allow for direct entry of RF channels but most allow for channel scanning only, which makes DTV DXing harder than it should be. Channel scans take time, sometimes minutes, and during the time it takes to do a scan, a DX station could have decoded and dropped out without you ever knowing it. DXing by channel scans should be avoided if at all possible.
So, considering that manual tuning is critical for success, here is our list of DTVs and set top boxes with manual tuning. We also include those known to have direct entry tuning (enter *2* then *1* for channel 21). Direct entry tuning is not as desirable as full manual tuning, but is still better than a DTV offering only channel scans.)
SET TOP BOXES/DTVs with MANUAL TUNING
1. Insignia NS-DXA1 CECB
2. Zenith DTT-901 CECB
3. Zinwell ZAT-970A CECB
4. Coby DTV-102 CECB
5. Sansonic FT300-A (the feature is called "Antenna Level") CECB
6. Silicon Dust HDHR3 & HDHR-US (network computer controlled tuners)
7. LG 32LG30 32" DTV (9/2009), 24" LG24LN451B, 42" LG42LN5300, and probably the entire line of LG DTVs. One WTFDA member purchased a LG DTV recently, compared its sensitivity to an Insignia converter box, and then decided to retire the Insignia box.
Direct Entry (of RF channels) Boxes & DTVs
1. Magnavox/Philco CECB
2. DigitalStream CECB
3. Toshiba 26" 26C100U1 DTV
4. Toshiba 26LV610U (2009) DTV
5. Panasonic 501 DTV
6. Sylvania 6427GFF DTV
7. Philips 19" 19PFL3504D/F7 (2009)
And there you have it. If you know of any others, let us know and we'll add them to the list. (Note: we do not guarantee this list to be 100% correct and cannot be held responsible for any inaccurate data).
Analog television stations are
beginning to disappear especially in the states bordering the
United States. To keep informed on the status of the Mexican DTV
transition on an almost daily basis, visit our WTFDA Forums
here and read Raymie's Mexico Beat ongoing thread.
Mexico will have transitioned over to DTV completely by the end of 2015.
Canada has transitioned over to DTV
except for some stations in rural areas. We have a complete list
of Canadian analog television stations
here, ready for the 2015 TV DX season. Check out the list
and try for them this summer. Although most of these are low
power, there are a few full power analog stations still alive.
WTFDA is the only Radio hobby club in North America that caters to the TV and FM DXer, as well as the amateur radio operator who looks for DX on 6 meters. The term "DX" means "distant reception", and those who "DX" look for weak, distant radio and television signals, with an eye to logging as many of these distant signals as possible or obtaining the most distant reception of a given station. TV and FM signals normally only travel 50 to 100 miles out from their transmitters. DXers love to push the reception boundaries of stations by hundreds or thousands of miles by using their skills, better antennas and equipment, and knowing when conditions are ripe for it.