Born the son of Rachel and Samuel Rosen, immigrants from Poland, Teddy was educated at the Jews' Free School in Kenton, northwest London. He joined Marconi in the Post Office Wireless Department in 1911. During World War I Teddy joined the Royal Flying Corps where he serviced radios. In 1920 he founded Ultra Electric where he was keen on delivering quality radio sets at a reasonable price. He was Chairman of the Radio Manufacturers' Association and served as Chairman of the Television and Radio Industries Club in 1953/54.
In retirement he was still giving talks on his career.
- Vintage Technology: Ultra Electric
- JFS Alumni
- Opening of BBC Television
- Television and Radio Industries Club Archived 2010-02-04 at the Wayback Machine
- In brief Flight Magazine, 13 January 1961
- Graces Guide: Ultra Electric
- British Technion Society Archived 2009-08-19 at the Wayback Machine
- Technion: Honor List
- Wireless Manufacturing between the Wars Flight Refuelling Amateur Radio Society, 4 February 2007
- National Probate Calendar
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