- Target: West Africa
- TX: Santa Maria di Galeria 🇻🇦
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, last version)
- Antenna: K-480WLA
- D/T: 24 JUL 2026 - 2044 UTC
The 31-meter band this morning.
95% of it is China and its jammers; the rest is NHK, RTI, and others that are barely audible.
There are also several Chinese stations on the other bands, but they’ve taken over the 31-meter band.
At least, that's what I'm picking up at my QTH. But I imagine the whole Southern Cone is the same.
- Lang: Japanese
- Target: Far East
- TX: Sontay, Hanoi 🇻🇳
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, last version)
- Antenna: K-480WLA
- D/T: 24 JUL 2026 - 1212 UTC
Just boring music that sounds like it's from '80s TV series. The broadcast is the segment in Korean.
- Target: Far East.
- TX: Tinang, Philippines 🇵🇭
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, last version)
- Antenna: K-480WLA
- D/T: 24 JUL 2026 - 1136 UTC
Listen Info plugin shows it as NHK from Japan, but they are no longer on that frequency in this A26 Schedule. The databases are up to date; I think I'll delete everything and download them again.
- Lang: Japanese
- TX: Paochung/Baujong (Yunlin province)
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, last version)
- Antenna: K-480WLA
- D/T: 19 JUL 2026 - 1108 UTC
This is the first time I've picked up the CW signal from this historic station, the Maritime Radio Historical Society (MRHS).
The frequency 17016.8 kHz is a well-known High Frequency (HF) maritime communications channel used primarily by the historic coastal radio station KPH in California. Operated by the Maritime Radio Historical Society (MRHS), it broadcasts continuous wave (CW) Morse code messages, weather, and traffic.
The MRHS broadcasts via the historic coastal station KPH serve educational, historical, and cultural preservation purposes. They aim to keep traditional maritime communications (such as Morse code and radioteletype) alive, paying tribute to the golden age of radiotelegraphy in the Pacific.
The transmit site for all MRHS stations is the original 1914 Marconi site in Bolinas, CA. The receive site is the RCA point to point site built in 1930 at Point Reyes, CA. KPH commenced receive operations at the Point Reyes site in 1946 when the station reopened after the war.
- TX: Point Reyes Station. Bolinas, CA
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, last version)
- Antenna: K-480WLA
- D/T: 18 JUL 2026 - 2035 UTC
Of all the signals I've received since I got into this hobby, this might be the strangest one.
Before posting this, I listened to it for quite a while as best I could because the signal was barely audible. I also wanted to make sure I had the right source.
It was indeed a Volmet, since I could hear weather reports.
It was easy to figure out where it was coming from, but I was surprised that it reached this far, since it’s a VHF transmission intended for the airport area.
I looked up a lot of information about that frequency, and everything points to the same place. At first, I found some incorrect information and mistakenly marked it as "Barcelona WX" in Listen Info plugin (as you can see in the video), but I've already corrected it.
Lately, I've been testing and listening at higher frequencies, and I've come across some interesting things. I've also tried DSDPlus and other tools.
However, I think it's best not to post certain things due to security concerns and local regulations. At least here in my country, that issue isn't clear, but it's better to avoid problems.
But if I receive public services from other countries, I post them.
- Lang: English
- Target: Central Europe
- TX: Frankfurt Airport (EDDF/FRA)
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, last version)
- Antenna: K-480WLA
- D/T: 11 JUL 2026 - 1941 UTC
Although the BBC has several relay stations on the 13-meter band, this is the first time I've heard it on 21520 kHz. I also found older references to the same program and time, but broadcast from Ascension Island.
- Lang: French
- Target: Central Africa
- TX: Al-Dhabbaya, UAE 🇦🇪 (Encompass Digital Media Services)
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, last version)
- Antenna: K-480WLA
- D/T: 05 JUL 2026 - 1214 UTC
It works with any desktop or mobile web browser. You just need to run the small SpyServer program on a Windows computer. This new web client offers the basic controls of SDR#; it feels very lightweight and easy to use.
Its creator (@lambdaprog on Twitter), is posting demos on his account showing how it works and shared a link to try it out, though the frequency range is limited.
There isn't a beta version available for download yet.
Demo:
https://airspy.com/webspy
Profile:
https://x.com/lambdaprog
It will undoubtedly be a great tool. I used SpyServer quite a bit with the RTL-SDR V4 dongles and the MagicSDR app on my local network via Wi-Fi and my cell phone, but I stopped using it because the app MagicSDR was too basic and I couldn't find any other worthwhile option as an SDR client on iOS.
About SpyServer:
Airspy SpyServer is a free, lightweight streaming server application that allows you to operate Airspy and RTL-SDR Radios (SDRs) remotely over a local network or the internet.
Source: Paul B Walker Jr. /HF Underground
The shortwave transmitter site NW of Brasilia operated by the national public broadcaster Empresa Brasil de Comunicacao for the Radio Nacional de Amazonia's service has had to make a schedule change in it's SW operating schedule.
EBC's Radio Engineering Manager Manoel Caetano tells me, "Due to technical problems and energy costs, the Radio Nacional de Amazonias service will have reduced operating hours through at least the end of the year"
11780khz will operate weekdays from 0745UTC to 2000UTC and 6180khz will operate weekdays from 2000 to 0300UTC
On weekends, 11780khz will operate from 0900UTC to 1800UTC while the 6180khz frequency will remain off air on weekends.
******************************************
My comment: I haven't found anything official about this yet. But it wouldn't surprise me if that's the case, since RNA's power output is very erratic (at least in my region).
Record details:
- Lang: Arabic
- Target: West Africa
- TX: Ouargla, Algeria 🇩🇿
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, May 7)
- Antenna: K-480WLA
- D/T: 21 JUN 2026 - 2202 UTC
For me, it's very, very difficult to listen to Radio New Zealand International. Just being able to hear something clearly from them is an achievement for me.
I kept listening for quite a while to see if the reception would improve, but it stayed the same.
Those 40 seconds are the announcement that the day's broadcast is ending. It's the first time I've heard it!
Record details:
- Target: Oceania
- TX: Rangitaiki, 🇳🇿
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, May 7)
- Antenna: K-480WLA
- D/T: 21 JUN 2026 - 2058 UTC
End of today's programming and end of broadcast
Record details:
- Lang: French
- Target: West Africa
- TX: Emirler, 🇹🇷
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, May 7)
- Antenna: K-480WLA
- D/T: 21 JUN 2026 - 2022 UTC
Record details:
- Lang: French
- Target: Europe
- TX: Bangalore**,** 🇮**🇳**
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, May 7)
- Antenna: K-480WLA
- D/T: 21 JUN 2026 - 1953 UTC
I just realized that the Portuguese speaker on The Voice of Turkey is from Portugal. But VoT's target audience is South America (Brazil).
And that can be complicated at certain points.
Although they share the same official language, there are notable differences in pronunciation, grammar, and vocabulary that require a brief adjustment period.
The difference would be like that between British English and US English, but a little more complex.
If there are Brazilians listening to VoT's programming, some of the words might be a little confusing to them.
That's what I think, but I could be wrong.
Here's a summary I found online that sums up what I'm saying:
From Portugal to Brazil (Easy to Understand): Portuguese people understand Brazilians with almost no difficulty. This is mainly due to their extensive exposure to Brazilian soap operas, music, and media.
From Brazil to Portugal (Requires adaptation): *Brazilians often find it harder to understand Portuguese spoken in Portugal at first. The European accent tends to be more closed, the vowels are less distinct, and many consonants are omitted, which makes it sound faster. (*Note: This would be the case with VoT)
I don't remember if other Portuguese-language broadcasts do the same thing; I'll pay closer attention from now on.
- TX: Emirler**,** 🇹**🇷**
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, last version)
- Antenna: K-480WLA
- D/T: 20 JUN 2026 - 0021 UTC
I was only able to capture two images, one of which was partial.
This is the first time I've received the Wefax signal from Guangzhou. Until today, I had only heard Volmet and beacon transmitters from this location.
- TX: Guangzhou, China
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, last version) and FLDIGI
- Antenna: K-480WLA
- D/T: 14 JUN 2026 - 1340 UTC
This is the first time I've heard this Russian beacon. The signal is weak, but the Morse code -.. can be heard clearly.
I've also been receiving a Russian Morse code signal on the 15928 kHz frequency lately. Those codes are groups of letters and numbers. I'll post an image below.
Marker D is located in the city of Sevastopol, Crimea, an important port city on the Black Sea. Historically renowned for its military significance, it is home to the headquarters of Russia's Black Sea Fleet.
Priyom's page provides details about this and other single-letter Russian beacons. Here is a summary of that:
The Russian naval bases broadcast single-letter beacons to help ships find the best communication channel given the current conditions. The beacons are clustered around ten different frequencies in 100 Hz slots.
- TX: Sevastopol, Crimea
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, last version)
- Antenna: K-480WLA
- D/T: 13 JUN 2026 - 2059 UTC
I used the IF filter to slightly attenuate the strong signal from China coming in from the side.
- TX: Parque do Rodeador, Brasilia, DF 🇧🇷
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, last version)
- Antenna: K-480WLA
- D/T: 12 JUN 2026 - 2030 UTC
- Target: North Africa and the Middle East
- TX: Noblejas 🇪🇸
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, last version)
- Antenna: K-480WLA
- D/T: 12 JUN 2026 - 2008 UTC
By midday, I usually can't pick up almost any HF signals anymore, but the TWR broadcast was clearly audible.
- Target: South Asia
- Lang: Desiya (a language spoken in northeastern India)
- TX: Talata Volonondry, Madagascar 🇲🇬
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, last version)
- Antenna: K-480WLA
- D/T: 12 JUN 2026 - 1445 UTC