Gallium nitride, a semiconductor renowned for its efficiency and high-speed capabilities, has long been recognized as a ...

The 8th Earl of Donoughmore, who has died aged 97, was a doctor turned businessman who helped develop the Perdio transistor radio into a feature of the Swinging Sixties. Viscount “Mick ...

Long before iPods, MP3 players, and Walkmans, transistor radios were the go-to portable music players. Just about everyone had one in the 1960s.

Known as “The Astronaut” by Realistic, it is a four-band portable transistor radio listed as a Radio Shack model 12-1377 in one of their catalogs.