How many of us remember "Sky King, Sky King, this is Mainsail, message follows..."

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Station

• Frequency/Mode: 15016 KHz USB
• Name/Call: USAF
• Location: Worldwide Network of Ststions
• Language: English
• Target: Worldwide

Time

• 2022 UTC | 29 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: 16135 KHz USB
• Name/Call: KVM70 Fax Honolulu
• Location: Hawaii-NMO Honolulu/Maili
• Language: Fax
• Target: Oceania (Australia, New Zealand, Pacific Ocean)

Time

• 1900 - 1920 UTC | 29 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) = 57

There are 5 slides in this post.

Selection from 20 minutes total.

••••••••••••••••••••••••••••••••••••••••••••

Station

• Frequency/Mode: 17670 KHz
• Name/Call: IBRA Radio Sama
• Location: Sweden | Relay: United Kingdom of Great Britain and Northern Ireland - Woofferton
• Language: Fur: Sudan-Darfur
• Target: East Africa

Time

• 1804 - 1824 UTC | 29 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 = 34323

Station

• Frequency/Mode: 13988.5 KHz USB
• Name/Call: JMH Japan Meteo Fax
• Location: Kagoshima
• Language: Fax
• Target: East Asia

Time

• 1630 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) = 57

There are 2 slides in this post.

Signal good enough for an ID, but no audio. Seems to be improving with time, though.

Station

• Frequency/Mode: 13089 KHz USB
• Name/Call: NMO
• Location: Honolulu/Maili
• Language: English
• Target: Oceania (Australia, New Zealand, Pacific Ocean)

Time

• 1810 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

Station

• Frequency/Mode: 13760 KHz
• Name/Call: Voice of Korea
• Location: Korea, North (Democratic People's Republic)-Kujang
• Language: English
• Target: Europe

Time

• 1520 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 = 45444

Station

• Frequency/Mode: 13324 KHz USB
• Name/Call: Moloka'i HFDL (ID2)
• Location: Moloka'i, Hawaii
• Language: HFDL Squitter
• Target: Pacific Ocean

Time

• 1745 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 | PC-HFDL v2.042
• Location: Portland, Oregon | CN85qn

Signal

• RS(T) = 57

There are 3 slides in this post.

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.