February 2026
I’ve re-started my experiments with an RX-888 MK2 SDR – this is an excellent receiver due to it’s 32MHz bandwidth, allowing you to monitor the full HF band.
I’m running Ubuntu 24.04 with the amazing ka9q-radio & wa2n ka9q-web web interface
The RX-888 has been modified as per this page https://ka7oei.blogspot.com/2023/08/improving-thermal-management-of-rx-888.html
I’m using the N4CY version of a LZ1AQ loop antenna https://active-antenna.eu/amplifier-kit
One of the major challenges has been reducing interference which continues to be an ongoing battle. Here are some of the things I have done so far
Here’s a diagram showing how it all connects
When I connected everything and reviewed the HF spectrum on ka9q-web I was suprised at the noise across the band and low signal strength
I then checked all my cables and connections, but no change.
When I removed the Turn Island Systems Pre-Amp the signals came alive
I’m currently investigating why the filter-preamp isn’t working as expected.
Links
Previous page with my experiments reducing interference www.airband-radio.co.uk/rfi
Original plan for using the RX-888 www.airband-radio.co.uk/rx888
Next Steps
Mains power line filtering using a GM3SEK Mains Filter
Material 75 ferrites to be placed on all power leads in the house Fair-Rite