Thread replies: 27
Thread images: 3
2016-01-31 15:00:36 Post No. 17297165
Post No. 17297165
Last thread 404'ed. But I'm reopening one due to recent high activity over the russian radio channels, and number stations.
http://websdr.ewi.utwente.nl:8901/ is a good place to hear these things
http://www.numbers-stations.com/ some info.
http://wiki.radioreference.com/index.php/Main_Page more references
http://www.sigidwiki.com/wiki/Signal_Identification_Guide MOAR STUFF
http://priyom.org/ lots of good info on the related subject.
Im also attaching a nice infographic, that may help.