Obituary provided by the family of Mr Barrett.
As a young man during the war, Ralph worked for the Special Operations Executive developing mobile transmitters and receivers. Following the war, he moved to the BBC where he became a senior engineer and worked on the early Eurovision connection.
Ralph lectured extensively during his lifetime, including at the Royal Institution and the Institution of Engineering and Technology, on subjects ranging from his hero, Marconi, the wireless used on the Titanic and clandestine radios used in prisoner of war camps during World War II. Ralph built and demonstrated apparatus for many of his lectures, and acted out the parts of those who were involved at the time.
In addition to his engineering interests, Ralph taught guitar, spoke fluent French and sang old time music hall at the Players Theatre in London.