My local county recently switched to a digital P25 radio system and effectively went silent on my old scanner. Open source to the rescue! With a $30 USB SDR dongle, small antenna and op25 I was able to get scanning again in short order.

I'm using boatbod's op25 fork of osmocom found here:
https://github.com/boatbod/op25
(the multi-rx python script enables an advanced GUI which is nice)

with an RTL-SDR
https://www.rtl-sdr.com/about-rtl-sdr/

and a cheap "Superbat 4G" antenna off amazon with an SMA male connector

Watched a pretty cool video about #APRS bots today.

https://www.youtube.com/watch?v=gXdTLerN8wo
APRS client shown:
http://aprsisce.wikidot.com/

Project sites taken from the video description:
WXBot: https://sites.google.com/site/ki6wjp/wxbot
APRSPH: https://aprsph.net/
REPEAT: http://aprs-repeat.hemna.com/#help
DAGA: https://reflector.sota.org.uk/t/introducing-daga-dagger-in-english-definitive-aprs-gadget-for-activators/35959
SMS: https://smsgte.org/
MPAD: https://github.com/projecthorus/sondehub-aprs-gateway
NTSGTE: https://nts2.arrl.org/ntsgte-an-aprs-nts-gateway/
APSPOT: https://apspot.radio/
SOTA: https://www.sotaspots.co.uk/
WTSAPP: https://wtsapp.org/

I heard about this #FCC proposal just last night: https://www.fcc.gov/ecfs/document/1042840187330/1

There is a group of financial trading companies that want to set up commercial digital transmitters at 20kW power with 10 kH bandwidth using frequency jumping tech to send real time trading information in the spectrum amateurs currently use.

1/3

Questions have been raised about possible interference and loss of spectrum.

Just another quick blog post, this time some quick notes on running wsjtx to decode digital messages without a radio - over the internet. I still don't have an HF rig, but that doesn't mean I can't listen to HF!

https://www.k3ltc.com/links/wsjtx.html