It’s been a while since the last update – sometimes life gets in the way of radio projects!
The WebSDR node has been progressing though – we have all 5 Softrock kits assembled and installed, and the SDR node is functionally complete. Unfortunately, my optimistic choice of a switchmode power supply turned out to cause spurious emissions in the waterfall so a linear PSU had to be made. This has been prototyped and eliminated the switchmode noises, but given the time and money invested in the node I wanted some additional safety features. Therefore I laid out a PCB with the linear reg components and also a crowbar circuit to protect the WebSDR should a fault develop with the power supply. Once those PCBs arrive, and the power supply is finished, we will be ready for on-air testing!