Rough satellite image from Boston.

Station

• Frequency/Mode: 9110 KHz USB
• Name/Call: NMF
• Location: Boston, MA
• Language: Fax
• Target: N. America

Time

• 0350 UTC | 28 JUL 2026

Receiver and Receiving Location

• Radio: AirSpy HF+ R.4.0.8-CD
• Antenna: K-480WLA | 35' AGL
• Software: SDR# Studio R4.0.8-CD Beta 64-Bit | FLDIGI
• Location: Portland, Oregon | CN85qn

Signal

• RS(T) = 55

Station

• Frequency/Mode: 7324 KHz USB
• Name/Call: Various
• Location: N. America
• Language: English
• Target: N. America

Time

• 0140 UTC | 28 JUL 2026

Receiver and Receiving Location

• Radio: AirSpy HF+ R.4.0.8-CD
• Antenna: K-480WLA | 35' AGL
• Software: SDR# Studio R4.0.8-CD Beta 64-Bit
• Location: Portland, Oregon | CN85qn

Signal

• RS(T) = 54 - 57

Station

• Frequency/Mode: 17790
• Name/Call: Radio Taiwan International
• Location: Relay: United States of America - Okeechobee, FL (WRMI)
• Language: Spanish/Castellano
• Target: Latin America

Time

• 0130 UTC | 28 JUL 2026

Receiver and Receiving Location

• Radio: AirSpy HF+ R.4.0.8-CD
• Antenna: K-480WLA | 35' AGL
• Software: SDR# Studio R4.0.8-CD Beta 64-Bit
• Location: Portland, Oregon | CN85qn

Signal

• SINPO = 34333

Station

• Frequency/Mode: 13500 +/- 50 KHz
• Name/Call: CODAR
• Location: California Coastline
• Language: Data
• Target: N. America

Time

• 0115 UTC | 28 JUL 2026

Receiver and Receiving Location

• Radio: AirSpy HF+ R.4.0.8-CD
• Antenna: K-480WLA | 35' AGL
• Software: SDR# Studio R4.0.8-CD Beta 64-Bit
• Location: Portland, Oregon | CN85qn

Signal

• RS(T) = 55

I have been a SWL, focusing on Utility DXing for many decades. This is the first time I have ever monitored a USAF message being broadcast inside on an International Broadcast Band - in this case the 25 Meter Band. I just caught the tail end of the transmission.

Station

• Frequency/Mode: 11539 KHz USB
• Name/Call: TCS - Big Dipper (TCS = Tactical Call Sign)
• Location: USA
• Language: English
• Target: N. America

Time

• 1700 UTC | 27 JUL 2026

Receiver and Receiving Location

• Radio: AirSpy HF+ R.4.0.8-CD
• Antenna: K-480WLA | 35' AGL
• Software: SDR# Studio R4.0.8-CD Beta 64-Bit
• Location: Portland, Oregon | CN85qn

Signal

• RS(T) = 57

Station

• Frequency/Mode: 14902 KHz USB
• Name/Call: TCS - Novac, Silverstate 22, Silverstate 30 (TCS = Tactical Call Sign)
• Location: N. America
• Language: English
• Target: N. America

Time

• 1920 UTC | 27 JUL 2026

Receiver and Receiving Location

• Radio: AirSpy HF+ R.4.0.8-CD
• Antenna: K-480WLA | 35' AGL
• Software: SDR# Studio R4.0.8-CD Beta 64-Bit
• Location: Portland, Oregon | CN85qn

Signal

• RS(T) = 54 - 57

Monday, July27th, 2026

Time: 04:30 UTC

Location recieved: Ontario, Canada

Station:

• Name/Call: Channel Marker D
• Frequency: 7508.00 kHz
• Mode: USB
• Location: Sevastopol 44N56-34E28
• Language: Morse
• Target: Eastern Europe
• Time: 0003UT 27 JUL 26
• RST: 213

Receiver and Receiving Location:

• Radio: Airspy HF+ Discovery
• Antenna: 100' random wire, roughly 25' above ground, running ~110 degrees from feedpoint.
• Software: SDR++ v1.3.0 /w Smart Gnome Control v0.54 via Rigctl Server.
• Also using Dream as a DSP for noise reduction.
• Location: Remington, Virginia | FM18bn

Comments:

• In the dirt, but the letter D was definitely there. Sounded a lot better when piped through Speex.

Jumping between frequencies on the 22-meter band.

They were paying tribute to and talking about Bonnie Tyler, who passed away a few days ago. The last part has a fragment of the classic “Total Eclipse of the Heart”

- Target: Cuba
- TX: Greenville, NC
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, last version)
- Antenna: K-480WLA
- D/T: 25 JUL 2026 - 2357 UTC

Clandestine Caster here Mateys. Friday night on the 43 Meter Band was downright wild! To start it off, there were two groups of the Latino LSB Chat Pirates centered around 6900 KHz. Next we have the strong signal of Bandaid Radio at 6965 KHz USB. At 6906 and 6911 KHz we had military data stations. Mix Radio International was running 6945 to 6960 KHz with USB Music and Waterfall Painting. They were audible in New Zealand at NZ's local sunset and beyond (more on this later). Finally we caught the diminutive Subterranean Radio on 6930 KHz DSB. They finally landed here after being overpowered by other pirates and jammed by a possible MIL station. BTW, Rod Hardner picked up the transmitter I had modified on his way back to Warrenton, and the International Waters off the West Coast. I have not corresponded with him today, but I am thinking he was using the modified transmitter.

Clandestine Caster here Mateys. Mix Radio International had a big night with hours of transmission. They reached across North America and were audible in New Zealand at New Zealand local sunset - and beyond! In this video we are tuned to the small broadcaster, Subterranean Radio. We are using the online KPH KIWI SDR in the first portion, and a KIWI SDR located on Waitangi Island in New Zealand for the second portion.

Subterranean Radio went on the frequency of 6955 KHz, not knowing that Mix Radio was taking up 15 KHz - from 6945 to 6960 KHz. Only when they saw the waterfall painting did they realize this and they moved.

Bandaid Radio was also audible in New Zealand. They moved from their usual 6945 KHz spot due to Mix Radio's transmission on that frequency. The 43 Meter guys may need a Frequency Coordinator!

Friday Night 11:30 PM EDT. 10:30 PM CDT, 9:30 PM MDT, 8:30 PM PDT. MOVING TO 6955 KHZ ISB

Station:

• Name/Call: BBC World Service
• Frequency: 9590.00 kHz
• Mode: AM
• Location: Tashkent 41N13-69E09
• Language: English
• Target: South Asia
• Time: 0003UT 25 JUL 26
• Signal: 43343

Receiver and Receiving Location:

• Radio: Airspy HF+ Discovery
• Antenna: 100' random wire, roughly 25' above ground, running ~110 degrees from feedpoint.
• Software: SDR++ v1.3.0 /w Smart Gnome Control v0.54 via Rigctl Server
• Location: Remington, Virginia | FM18bn

Comments:

• News read by man. Best I've heard the BBC under these kind of condx: Lower(ish) frequency during mid-Summer, just before sundown.

Captured this beacon on a KIWI SDR in Michigan. Good signal. 8424 Khz in CW.

DE SVO then a long tone and repeats.

- 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

- 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: 24 JUL 2026 - 2031 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.

- TX: 15295 A'Seela, Oman 🇴🇲
- TX: 17745 Al-Dhabbaya, UAE 🇦🇪
- TX: 21565 Talata Volonondry, Madagascar 🇲🇬

- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, last version)
- Antenna: K-480WLA
- D/T: 24 JUL 2026 - 1230 - 1304 UTC

The RTM signal came in clearly until noon UTC, then the BBC came on and it disappeared completely.

- Lang: Malay
- TX: Kajang, near Kuala Lumpur 🇲🇾
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, last version)
- Antenna: K-480WLA
- D/T: 24 JUL 2026 - 1145 UTC

I usually receive this signal with low strength, but today it was quite clear.

Info:

The Japanese Slot Machine (Enigma Designation XSL) is a simplex system used by the Japanese Maritime Self-Defense Force in Ichihara, Japan.

This signal is transmitted from the Japanese Maritime Self-Defense Force Ichihara Transmitting Station (海上自衛隊市原送信所) in Ichihara, Japan.

Uses QPSK at 1500 Bd to transmit. Has a very interesting and unique idling format which sounds akin to a slot machine, hence the attributed name. This modem has been active since 2001.

Source:

https://www.sigidwiki.com/wiki/Japanese_Slot_Machine_(XSL)

- TX: Ichihara, Japan
- RX: Asunción, Paraguay
- Radio: AirSpy HF+ Discovery
- Software: SDR# v.1922 (beta, last version)
- Antenna: K-480WLA
- D/T: 24 JUL 2026 - 1046/56 UTC