Interesting collections and history
Eliseo Chiarucci, Telegraph Key Collector: http://www.morsekey.net
Antique radio Magazine: http://www.antiqueradio.it/
The home page of Louis Meulstee, the author of "WIRELESS FOR THE WARRIOR" series of books devoted to the technical history and development of British Army radio communication. http://home.planet.nl/~meuls003/
http://www.rkk-museum.ru/
Radio comunicazioni militari nella seconda guerra mondiale http://www.roverjoe.com/
Tracce di storia - Associazione storico culturale http://www.traccedistoria.it/
THE ELECTRON AGE http://www.fazano.pro.br
Sito ufficiale della storica azienda "UNDA RADIO" http://www.undaradio.com/