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Messages - SM5003SWL

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HF Mystery Signals / What kind of OTH radar could this be..
« on: March 29, 2024, 1209 UTC »
Got this signal around 6255kHz a couple days ago which sounded like a faster version of the Duga but it has some differences compared to other OTH radars I've noticed..
Besides the fast pulses it also had a carrier at 600Hz, and a subset of under and overtones from ~2600-3200Hz.

https://vocaroo.com/14cJp8IeOGq3

Besides that the pulses also momentarely stopped however the carriers remained...





Does anyone know which system causes these particular signals?
Cheers! //Greg.

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