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Description: | For much of the 20th century, Enfield and its surrounding area was an important centre of the electronics industry following the opening of Britain’s first radio thermionic valve factory at Ponders End in 1916 .The factory was opened by Edison & Swan United Electric Light Company, known commonly by its trade name Ediswan. Research carried out by the Ediswan factory led to the invention of the radio valve, one of the most important discoveries of the 20th century. This particular Ediswan valve was produced c.1947 and was a vital component used to increase power and amplify signals for radio, television and radar. Despite valve production falling after the introduction of the transistor in the early 1950s, valves still remain in use today. For example, they continue to play a role in the music industry, where the sound produced by a valve operated amplifier is often considered to be superior in quality. | License: | http://creativecommons.org/licenses/by-nc-sa/2.5/ | Publisher: | Enfield Museum Service | Rights holder: | Enfield Museum Service | Subjects: | Work | Source: | Enfield Museum | Identifier: | http://www.20thcenturylondon.org.uk/rser... | Go to resource |
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