Aim: Monitor multiple HF aeronatical frequencies & automatically record audio when voice is active
I would like to be able to use Linux voice recording software JSquelch https://github.com/jontio/JSquelch with Phil Karn’s ka9q-radio software https://www.sdrutah.org/info/using_ka9q_radio_with_the_rx888.html
Additionally I’d like to use ka9q-radio with an ALE decoder. The only Linux software I have found is https://github.com/DigitalHERMES/LinuxALE
Please contact me if you can help darren@airband-radio.co.uk
Useful SDR links
Scott Newell ka9q-web https://github.com/scottnewell/ka9q-web
SDRangel – https://www.sdrangel.org
PhantomSDR – https://github.com/PhantomSDR/PhantomSDR
SDR++ https://www.sdrpp.org/
SoapyRX888 – https://github.com/cozycactus/SoapyRX888
KC2G online RX-888 MKII https://websdr.kc2g.com/radio.html
Antenna
I’m using the N4CY version of a LZ1AQ https://active-antenna.eu/amplifier-kit
Previously I was using a WellGood v4.1 loop antenna https://www.george-smart.co.uk/projects/wellgood-loop built by Mike with a Coax loop attached to a hula hoop https://www.merseyradar.co.uk/m1geo-wellgood-active-rx-loop-antenna
1.6M Copper Tube for WellGood (Roland hb9vqq) – https://bsky.app/profile/hb9vqq.bsky.social/post/3letnx6ugkk2o
Modifications / Upgrades
Thermal Improvement – https://ka7oei.blogspot.com/2023/08/improving-thermal-management-of-rx-888.html
Filter-Preamp Turn Island Systems Filter-Preamp-v1-rev-2.pdf
Blog about needing a 30MHz Low Pass Filter / Shelf Filter https://ka7oei.blogspot.com/2024/12/frequency-response-of-rx-888-sdr-at.html
Changed the included USB cable for one of these 0.5m USB 3.2 Type A to B Cable, 5Gbps, Anthra Line – Cables & Adapters from LINDY UK
Cypress FX3 Windows 11 driver – Solved: Fx3 Driver for window 11 – Infineon Developer Community
Computer
HP Prodesk 400 G5 MT / i7-8700 / NVIDIA T600 GPU
CPU fan changed for a Noctua NH-D9L https://noctua.at/en/nh-d9l and the chasis fan with a Noctua NF-A9 PWM https://noctua.at/en/nf-a9-pwm – both keep the PC near silent
RFI
I have created a dedicated page to RFI being received with the RX888 and WellGood Loop www.airband-radio.co.uk/rfi