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On Friday, I managed to set aside an hour to finally do a video comparison of the Digitech AR-1780 and the new XHDATA D-808.
I placed a table in my driveway, far away from any source of RFI, and set up the radios in identical configurations: same orientation, antennas fully-extended, same AM bandwidth (4.0 kHz), same audio levels, etc. For good measure, I also included the venerable Tecsun PL-660 in the mix.
This was still daytime listening, so all of the stations were from 31 meters and up.
Apologies in advance: somehow the cord from my monitoring headphones is in the shot on some of these videos! I’m still getting used to the new Zoom Q2n video camera:
For those who follow numbers stations or, like me, enjoy seeing articles about numbers stations, below are a few paragraphs from a recent article in Radio Worldby author James Careless:
“6-7-9-2-6. 5-6-9-9-0.” Tune across the shortwave bands (above AM/MW), and chances are you will come across a “numbers station.” There’s no programming to speak of; just a mechanical-sounding voice (male or female) methodically announcing seemingly random groups of single digit numbers for minutes on end.
Congratulations! You are now officially a spy-catcher, to the extent that you may have tuned into a spy agency’s “numbers station” transmitting one-way instructions to their minions worldwide.
Numbers stations are unidentified radio broadcasts that consist usually of a mechanical voice “reading out strings of seemingly random numbers,” explained Lewis Bush, author of “Shadows of the State” a new history of numbers stations and the spies who run them. “These are sometimes accompanied by music, tones or other sound effects.” He said. “There are also related stations broadcasting in Morse Code and digital modes.”
The article goes into some of the history of numbers stations, but also talks about modern stations from all over the world. A worthwhile read for those so interested!
Many thanks to SWLing Post contributor, Ivan (NO2CW), who writes:
I have been running a public Kiwisdr server for a while and yesterday decided to plug in the new Airspy HF + into the same antenna for a side to side comparison. The antenna is an 80m dipole and the test was done during local afternoon, around 3 PM. I did not use any of the many new noise reduction features that are incorporated into both SDR Console 3 and the SDR web server. The 11 minute video is located here:
The beautiful Capim River in a land of Jaguars, Tarantulas and occasionally, wonderful shortwave DX
Hi there, I returned from my third trip to the Rio Capim area of Pará, Northern Brazil about 5 weeks ago, having been out there for exactly a month. Now, whilst this was strictly a business trip I always make time to tune around the bands, mostly shortwave, in the hope of copying some interesting DX. My previous two trips were reasonably successful; however, I didn’t really hear anything new – just lots of Tropical Band – and tropical stations with much greater signal strength and clarity. Part of the problem is one of which most of us suffer from – the dreaded local QRM. Even in the depths of the rain forest noise is present from building electrical systems (particularly lighting) and other equipment. In my first attempt to escape the noise on this trip I ventured out of my accommodation building (basically a very large hut) to the wire fence that separates us and the larger fauna (although having said that, the monkeys and everything else that lives in the area appears to have no difficulty scaling a 6 foot fence – funny that! ). Anyway, ultimately, you’ve really got to want to hear something special quite badly to venture out. I suppose it could be the definition of hard-core DX! I tried this only once because as I was copying a very nice signal from Radio Guinea on 9650 kHz, I found myself about 2 feet from a Tarantula Hawk Wasp dispatching a very large spider (check out the very brief video on my YouTube channel). That was me done for alfresco DXing in the jungle.
Bonito’s USB-powered MegActive MA305 E-field antenna up a tree…performed superbly in Brazil
Fortunately, I was lent a 4-wheel drive truck for the duration of my visit and so I decided to find a quiet location to park up and listen to the radio – therefore only having to venture outside (at night) to place my antenna. One evening after dinner I got in the truck and drove around the site for a while until I found a location, effectively on the edge of the jungle that was mostly very quiet. Perfect…as long as I didn’t end up as something else’s dinner. I took the super-compact USB-powered Bonito MegActive MA305 antenna with me on this trip because I’d already tested it at home on DXpeditions and in Crete and thus I was confident as to how superbly well it would perform in a quiet location. To supplement my antenna choices, during the first weekend, I made the 90 km drive to the nearest town and bought, amongst other supplies, a 40 metre length of speaker wire and a 3.5 mm jack connector to make a temporary long-wire antenna.
In my experience, there are roughly 3 tiers of Tropical and Tropical Band DX on short wave. There’s the bottom tier of stations which with a decent portable and a few metres of wire can be readily heard in the UK on a Dxpedition – and at home with a magnetic loop antenna, for example and a good quality table-top receiver or SDR. Amongst this group of signals I would include Rádio Clube do Pará, Brazil on 4885 kHz, Radio Difusora Roraima on 4875.3 kHz, Emisoras Pio XII 5952.5 kHz, Radio Santa Cruz, 6134.8 kHz etc. etc. On the next tier are tropical stations that are really difficult to hear in the UK – but can be heard with good propagation and good equipment. This group includes Radio Aparecida on 6135.2 kHz particularly, Rádio Educação Rural on 4925.2 kHz, Radio Tarma Internacional on 4774.9 kHz, Rádio Evangelizar (formerly Radio RB2) on 6040.7 kHz etc. There are many more examples from these two groups I could use, but you get the picture. Lastly, there is a tier of stations that are very rarely or never heard in Europe, irrespective of equipment or propagation. Often these stations operate with low TX power which makes them extremely difficult to copy anyway – and that leads to ambiguity farther as to whether they are even on-air. Furthermore, some of these stations broadcast very irregularly, which makes copying them even more of a lottery.
My mainstay travel receiver, the brilliant Eton Satellit..two-time veteran of South American DXing
In this context, a month in Northern Brazil was a useful timescale for surveying the Tropical Bands and geographically tropical stations for the presence of very rare signals. Fortunately, over many hours of listening in Rio Capim with the Eton Satellit and mostly the Bonito MegActive MA305 antenna, I manged to record six signals that are very rarely heard outside of South America. The list of stations follows below, complete with the antenna arrangement. Further below you will find embedded reception videos and text links to the same videos on the Oxford Shortwave Log YouTube channel. Please take the time to watch the videos and note the comments made by some of my subscribers with local knowledge. In particular, Rádio Gaúcha and Rádio Canção Nova on 4825 kHz are very irregular broadcasters and therefore I was fortunate to be in the right place, at the right time to copy their signal. More luck came my way with the reception of Radio Sora de Congonhas on 4775 kHz – made possible because of a total power cut on site, reducing noise effectively to zero (I was indoors at the time). I, personally, never heard anything else other than Radio Tarma, Peru on or around 4775 kHz – itself something of a rarity, except when conditions are very good.
In conclusion, I have to say, once again, the DXing credentials of the Eton Satellit and the Bonito MegActive MA305 USB-powered antenna are clearly demonstrated here. The perfect travelling companions for the serious DXer and broadcast band listener alike, I had no issues getting through security at any of the airports and their combined weight is unnoticeable in a fully loaded backpack. I definitely recommend both products. It’s also worth noting that if you’re travelling to a relatively remote location, even with modest equipment, you might be able to copy rare signals that will provide good information to the rest of us trying to hear those same signals from 1000’s of km away. I will be returning to Rio Capim early in 2018 and I’m seriously considering taking my Perseus SDR with me. A superbly sensitive and selective receiver with noise reduction that actually works, it opens up the possibility of even more exotic DX on that trip.
As always, thanks for watching/listening/reading and I wish you all excellent DX and Season’s Greetings. 73!
The list of exotic catches and antennas utilised:
Radio Apintie 4990 kHz, Suriname – Bonito MegActive MA305
Radio Cançao Nova 9675 kHz Sao Paulo – 20 metre long-wire
Radio Verdes Florestas 4865 kHz, Cruzeiro do Sul – Bonito MegActive MA305
Rádio Gaúcha 11915 kHz, Porto Alegre – Bonito MegActive MA305
Radio Sora de Congonhas 4775 kHz, Congonhas – Bonito MegActive MA305 antenna
Rádio Canção Nova 4825 kHz, Cachoeira Paulista – Bonito MegActive MA305
Clint Gouveia is the author of this post and a regular contributor to the SWLing Post. Clint actively publishes videos of his shortwave radio excursions on his YouTube channel: Oxford Shortwave Log. Clint is based in Oxfordshire, England.
There should surely be a queue down the street for a steady job in a subtropical climate with beautiful beaches and ocean views, especially after you have climbed a 413ft radio mast.
But contractors running the BBC Atlantic relay station on Ascension Island in the south Atlantic have had to readvertise a post for a full-time antenna maintenance supervisor. It may not be the job of everyone’s dreams, but it would suit anyone with a head for heights and a longing to get away from it all.
[…]Attempts to recruit a new rigger have proved unsuccessful, even though the job comes with a bungalow and an unspecified salary with a singular advantage: there are few places on Ascension (population roughly 800) to spend any money.
[…]The successful candidate will not lack for fun. There are beachside barbecues and even an 18-hole golf course, although the greens are known locally as “browns” and visitors have unkindly dubbed it “the worst golf course in the world”.
Many thanks to SWLing Post contributor, David Iurescia (LW4DAF), who notes that Radio Exterior de España’s has announced winter frequency changes on their website.
David passed along an English (Google) translation of the REE notice:
Due to the winter time change, from October 29, Radio Exterior of Spain changes its emission frequencies in Short Wave.
From Monday to Friday, between 19 and 23 hours, universal time coordinated, Radio Exterior of Spain will offer its emissions in 11,685 kilohertz for West Africa and the South Atlantic. At 15,390 kilohertz for South America and the Pacific Ocean. At 9,690 kilohertz for North America and Greenland. And at 15,500 kilohertz for the Indian Ocean, Middle East and Great Sun.
On weekends, for West Africa and the South Atlantic, between 15 and 19 hours, universal time coordinated, at 17,755 kilohertz; and between 19 and 23 hours at 11,685 kilohertz.
On Saturdays and Sundays, between 15 and 23 hours, at 15,390 kilohertz for South America and the Pacific Oceans; at 9,690 kilohertz for North America and Greenland; and 15,500 kilohertz for the Indian Ocean, Middle East and Great Sun.
These are the frequency changes of the Spanish Foreign Radio Broadcast Wave emissions that will come into effect on October 30 due to the time shift to the winter.
Radio Exterior of Spain can be followed through satellite radio in all parts of the planet 24 hours a day uninterruptedly:
SES Astra 1M: frequency 11,626.5 MHz. Vertical polarization.
Hispasat 30W-5: frequency 12,015 Mhz. Vertical polarization.
Asiasat 5: frequency 3,960 Mhz. Horizontal polarization.
Eutelsat 5 West A: frequency 3,727 Mhz. Circular polarization.
Intelsat Galaxy 23: Frequency 4,191.35 Mhz. Vertical polarization.
Radio Exterior of Spain is heard on the Internet, in streaming or in the podcast of all its programming.
There are also mobile applications (link for Apple app or Android) for mobile applications, such as phones and tablets. And from any municipality and province of Spain you can enjoy, through television, Radio Exterior of Spain by DTT.
Many thanks to SWLing Post contributor, Dave Zantow (N9EWO), who notes that he has published a review of the Tivdio V-115 on his website.
Dave’s conclusion? This little receiver is a “Decent Low Cost Pocket Set.” I would whole-heartedly agree. I mean, this little radio is widely available on Amazon and eBay for around $19.00 – 25.00 US including shipping! About as inexpensive as a radio gets.
Though you pay for what you get, with the Tivdio V-115 (a.k.a. Audiomax SRW-710S), you get a lot more radio than you would expect for the price.
Listening to the BBC Midwinter Broadcast on June 21, 2017 in Québec.
In terms of performance, the V-115 isn’t on par with even the venerable ($40-50) Tecsun PL-310ET (in my opinion).
However, the V-115 has decent off-air recording capabilities and is more sensitive than anything else in its price range that I’ve reviewed (despite internally-generated noise). I receive numerous inquiries from SWLs in India who seek a $20-30 receiver–the V-115 may be a good choice for those on a very tight budget.
But Dave’s review goes into great detail about the V-115’s quirks, performance and overall usability. I encourage you to read it before making a purchase decision.
My mainstay travel receiver, the brilliant Eton Satellit..two-time veteran of South American DXing
