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Marconi correspondence and related documents regarding telegraphy experiment 1897

Diaries and Notebooks of Edgar Walter D Negus FIEE

The Radio War

'Power Measurements on CV38 Magnetrons nos. 247, 249 and 287' with accompanying letter

Correspondence re informal discussions on Magnetron research and development

Miscellaneous correspondence re Magnetrons

TRE: 'Preliminary report on impedance measurements at 10 cms'

TRE: 'Fundamental Unsoundness of concept of space charge limitation in Magnetrons'

A.l.s. to Faraday from Hugh Seymour Tremenheere

Report from Mr R Tree on visit to Heaviside

Letter, R Tree to Highfield

Letter, R Tree to Highfield

Letter, Highfield to Mr R Tree

File of papers forwarded to James Redmond as Director of Engineering

BBC lunchtime lectures