- TítuloFour-Electrode Valve
- Valve
- DescripciónFleming Four-electrode valve. British patent 149, 422, 12 May 1919. (see also Fleming "Thermionic Valve). 2 pairs of anodes (nickel) arranged symetrically around filament. Used as a detector.
- Material
- Dimensiones
- length: 140 mm
- CreadorMarconi Osram
- Electronic and Electrical Engineering
- Número del objetoLDUSC-EE-159
- 158
- UCL Science and Engineering Collections
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