🎙️ One-two, one-two, is this thing on? It’s been a minute! Late to the party but here’s uConsole CM4 running CubicSDR with #AirSpy HF+ Discovery.

🇳🇿 RNZ Pacific welcoming 2025 and some 20m ham band activity recorded with the above set-up.

🇳🇿 Ringing in the New Year with RNZ Pacific @rnz.co.nz.web.brid.gy

Had a great time capturing the 31 meter band for 3 hours this afternoon using my Pi Zero 2W portable recording contraption and @airspy.com HF+ Discovery with the new firmware. Flawless baseband AGC despite a very hot antenna (2x6m dipole) AND the HF preamp being on. #PortableSDR #SDR #Shortwave 📡

🇮🇳 I miss having All India Radio's English language service in abundance on shortwave! This is a recording from 17/08/2015 at 1900z on 11670 kHz, received indoors using a FunCube Pro+ dongle and a Wellbrook ALA1530SP loop antenna.

🇨🇺🇨🇺🇨🇺🇨🇺 (11760 kHz - 02/07/2015 2323z)

🇨🇺 I've been digging through my old archives and my very first spectrum recordings. Here's Radio Habana Cuba's broadcast on Fidel Castro's 89th birthday (11670kHz - 06/08/2015 0101z). I captured this indoors with a Wellbrook ALA1530-SP antenna and FunCube Dongle Pro+. #Shortwave #SDR #SpectrumCapture

🇧🇷 Rádio Nacional da Amazônia on 04/12/24 at 2200z on 11780 kHz. Captured with the battery-powered Pi Zero 2W, AirSpy HF+ and 2x6m dipole in a local park. #PortableSDR #SpectrumCapture #Shortwave #HF #DX #AirSpy #PiZero2W #PiZero

1/2 After a few charge and discharge cycles, the 4xAA Eneloops support the built-in battery for longer: the recorder kept going for 4 hours and 10 minutes. That's long enough for most of my park outings! Here's the resulting capture from last night. The system is good to go! 🚀

2/2 setting the centre frequency and starting the recording:

1/2 Just playing around with recording some medium wave spectrum off my YouLoop installation on the balcony. Testing power-on and boot-up:

Experimenting with a new physical interface for the spectrum recorder. Added an option to switch off the backlight to save battery (& when I send the UI to “sleep” this way, I also change the controller polling interval from 0.1s to 1s to reduce Python’s CPU usage). These things matter on Pi Zero 2W

3/4 Here’s a recording I made in my local park last Friday. New Zealand was coming in nicely! The baseband file is saved onto the same microSD card that the Pi boots from, so the card has to be fast and preferably class A2 for more efficient random writes (the OS keeps interrupting sequential I/O).

1/4 This is my most portable shortwave spectrum capture contraption yet. A Pi Zero 2W rigged up to an AirSpy HF+ SDR. The Pi has a Waveshare UPS HAT with a small capacity LiPo battery — enough for 70 mins of recording. It is further supported by 4 AA Eneloops, adding 100 mins of extra recording time