radio technology

Black Vinyl at 33⅓ RPM

Black Vinyl at 33⅓ RPM

On June 21, 1948, Columbia Records introduced the long-playing record album, in short the LP, in a public demonstration at the Waldorf-Astoria Hotel in New York, New York, which soon was adopted as a new standard by the entire record industry. Apart from relatively minor refinements and the important later addition of stereophonic sound capability, it has remained the standard format for vinyl “albums”. It all starts with the Player Piano To…
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Hedy Lamarr – a Hollywood Star Invents Secure Communication Technology

Hedy Lamarr – a Hollywood Star Invents Secure Communication Technology

On November 9, 1913, Hollywood movie star Hedy Lamarr was born, co-inventor of an early form of the spread spectrum communication and frequency hopping, necessary for wireless communication from the pre-computer age to the present day. Family Background Ok, I assume that you are not necessarily familiar with spread spectrum communications technology. But, maybe you are wondering even more about a movie star diva of Hollywood’s Golden Age, who should be responsible for the…
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