Links - Sites of Interest
Number Station Information
Numbers & Oddities - Ary's N&O site, home of the N&O newsletter
Priyom.org - Daily Numbers Schedules Calendar. Radio, Number Stations & more
Historic Number Station Information
Number Stations - Dirk Rijmenants' Number Stations Page
Uno, Dos, Cuatro - A guide to Numbers Stations - 'Havana Moon's' 1987 Book (pdf)
Secret Signals - The Euronumbers Mystery - Simon Mason's 1991 Book (pdf)
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
Technical Information
Crypto Museum - Comprehensive resource of all crypto / espionage technical equipment.
Cipher Machines & Cryptology - Dirk Rijmenants' detailed site covering these subjects.
Jamming
Radio Jamming Info - Rimantas Pleikys' Legacy Website
Software
Audacity - An excellent free sound recording & editing program
Spectrogram V16.0 - Sound analysis program V16.0 - Freeware Version. Runs on Win10
(Many thanks to Jim W for sending me this file & thus making it available to all).
Spectrogram V5.0 - Sound Analysis program - Freeware Version. Runs on Win10 - No installation required.