Notices by Søren Kjærsgaard (oz1lqo@techhub.social)

This weekend was special: yesterday the baltic countries: Estonia, Lithuania and Latvia, disconnected from the Russian/Belarus 50Hz power grid, going ‘island mode’, controlling the 50Hz grid frequency themselves.

After more than a day of different stability tests, this afternoon, just before 13:00 CET, a connection to the European grid was established via Poland, so now the the three countries are in 50Hz sync with Europe.

I observed a small, undramatic, ‘burp’ in the frequency at the time of the event, and my wall socket is now in full sync with the measurement in Estonia, provided by #sympower⚡️ 😃👌🏼

#gridtech #powerdistribution #electronicsengineering #testandmeasurement

Weird things are happening in the #hamradio and #osint communities these days - a new channel marker suddenly surfaced and this one is like none before: it starts at 5MHz and then repeats its short beeps (pulses, actually) every 400kHz until 30.2MHz, exactly 64 carriers, with the same signal, perfectly synced, it would seem.

So far its origin is unknown and it’s purpose and application is also very much unknown 🙂

It’s been heard all over the world, you can try it yourself with one of the many online #kiwisdr receivers 🙂

#sigint #signalintelligence #hamr

@KI7CFO Yes. It’s been confirmed across different types of receivers and at different locations, some of them far away. Its signal strength seems to vary quite a bit, it’s currently unclear whether that is a propagation thing or the emitter itself, or maybe both. ‘Double pulses’ out of sync have also been observed at certain frequencies, suggesting a second emitter, however that’s all guesswork. Origin is likely European based on signal strength measured at different locations (kiwisdr network) and some very coarse triangulations puts is at central/south Europe, but we need A LOT more bearings from European hams to be more precise. So it’s still a mystery 😃😃 73s

@ve3qbz @KI7CFO It’s gone, unfortunately, after just a weeks transmission. Maybe we were getting too close, maybe it’s coincidental, who knows 🙂 I’ll be back if it reappears 🙂 73 and have a nice weekend 👍🏼👍🏼