Links - Sites of Interest


Number Station Information


Frequency Information & Station Trends - schedules & info on various number stations


Numbers & Oddities - Ary's N&O site, home of the N&O newsletter


Number site by Simon Mason - Simon Mason's Number site


Priyom.org - Daily Numbers Schedules Calendar. Radio, Number Stations & more


Number Station & Related Shortwave Items by TomH - Number Stations & Espionage



Signal Identification


Signal Identification Guide - sigidwiki.com - Comprehensive list of SW signals


Leif Dehio's Digital Modes Site - Ultimate source for digital signal identification


Mystery Signals of the Short Wave - Oddities heard on short wave, past & present



Historical Information


Electronic Espionage - Unique personal insight into the clandestine 'Y' SIGINT Service


The Secret Listeners - 1979 BBC Documentary about the VI (Voluntary Interceptors) in WWII


BRIXMIS - The history of the British C.I.C. Mission in East Germany 1946-1990



Technical Information


Cipher Machines & Cryptology - Dirk Rijmenants' detailed site covering these subjects.



Publications


Eye Spy Intelligence Magazine - The leading publication on espionage & intelligence



Software


Audacity - An excellent free sound recording & editing program (sourceforge)


Audio Spectral Analysis - Spectrogram V5.0 - Last free version


PDF Reader (Cost Free) - Adobe PDF reader for ENIGMA Newsletters & Documents



Miscellaneous


Sigint-Group.Org - Germany - German language radio forum


Southgate Amateur Radio Club - A well maintained, news site useful to radio enthusiasts


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