Letter | Published:

A Method of Investigating Electron-Inertia Effects in Thermionic Tubes

Nature volume 141, page 1009 (04 June 1938) | Download Citation



IT is well known that the phenomena exhibited by thermionic vacuum tubes begin to alter when the frequency of the potential applied to their electrodes is increased so as to approach the inter-electrode transit-time of the electrons. It is convenient to group all these phenomena under the name of electron-inertia effects. They include the production of high-frequency oscillations by the magnetron and the Barkhausen-Kurz method, and the occurrence at very high frequencies of a phase shift of the conductance of a diode and of the mutual conductance of a triode, and increased damping in the grid circuit of a triode.

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  1. Cavendish Laboratory, Cambridge. May 2.

    •  & J. A. RATCLIFFE


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