SIGNAL IDENTIFICATION GUIDE (SigIDWiki.com)

fmscan.org - Radio Frequencies & Transmitter Maps worldwide

List of european long wave transmitters (chemeurope.com)

Numbers & Oddities ( "The Spooks Newsletter"): lumea fascinanta a "Number Stations" si a altor semnale ciudate din spectrul HF

Short-Wave.info (baza de date globala cu statii de radiodifuziune si orar de lucru)

MWLIST quick and easyThis web page is just another view of the content of www.mwlist.org, a unique database of worldwide radio stations on longwave, mediumwave and shortwave. MWLIST powers various things like the mediumwave section of fmscan.org, the mwoffsets file, a userlist for Perseus, and an online logbook site. Such a global database did not exist before. It was created following the example of FMLIST. It is a non-commercial and hobby project and open for everyone to contribute and use. 

List of Greek radio stations

Radio Pirates List1 (AM-FM)

https://priyom.org/ (baza de date semnale speciale )

PilotNav ( baza de date balize aero )

REU / RNA / RWW Signals ( Signals Received in EUrope/North America/World Wide - a very detailed signals selective database)

Posturi radio FM online din Romania 

Radio Garden (planiglob rotativ 3D cu posturi de radio online)

Trasare azimuturi si rute:  https://osmcompass.com/      https://setcompass.com/DrawRoute.htm

LZW Varna (Bulgaria) maritime coastal radio schedule (you can listen it on our online SDR's)

M.F. Coastal & Maritime Stations 305 kHz to 4000 kHz ( www.coastalradio.org.uk )

Autoritatea Aeronautica Militara Nationala ( vezi liste balize NDB militare )

Baliza OMW 406 KHz (NDB mil. Otopeni, 44 33.62N 026 04.55E ) [ document PDF aici ]

Baliza GNA 284 KHz (NDB Bulgaria, Gorna Oryahovitsa