Details

Includes: 'Switchboard Instruction sheets', 1924-1925; 'Valve Design', 1940s; 'Specification for the Starting Up and Running of Hydrogen Furnace', 1940s; 'Valves/Electronic Tubes and extracts from Wireless World', 1930s-1950s; 'The Mechanical Properties of Cinseal', 1948; 'Basic Equipment for Valve Manufacture', c. 1945; 'Standard Special Materials', 1940s; 'VS Specification and Index', 1950s; 'Technique of Trustworthy Valves', by Ernest G Rowe, 1951; 'The Development of a Spot Welding Transformer for Radio Valve Manufacture' by K V Slee, 1951; 'Brimar Valve Works', 1950s.