I found this and thought it facinating.. An old radio magazine featuring an article on the RCA Theremin. (Page 202)
http://www.vacuumtubeera.net/RadioBroadcast-Vol-16-1930-02.pdf
A whole collection of these magazines from 1922 can be found here http://www.vacuumtubeera.net/RadioBroadcastMagazine.html
and the site vacuumtubeera (http://www.vacuumtubeera.net/) has loads of stuff .. the sort of stuff some of us 'old school' engineers disposed o0f many years ago, and now regret.
I am copying the lot to my HD, just in case this site goes down.. IMO this is all gold dust!
Fred.
http://www.vacuumtubeera.net/RadioBroadcast-Vol-16-1930-02.pdf
A whole collection of these magazines from 1922 can be found here http://www.vacuumtubeera.net/RadioBroadcastMagazine.html
and the site vacuumtubeera (http://www.vacuumtubeera.net/) has loads of stuff .. the sort of stuff some of us 'old school' engineers disposed o0f many years ago, and now regret.
I am copying the lot to my HD, just in case this site goes down.. IMO this is all gold dust!
Fred.