- Object CategoryValve
- DescriptionFleming 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.
- Publications- Thermionic Valve and its Development in Radiotelegraphy and Telephony
- Material
- Dimensions
- length: 140 mm
- CreatorMarconi Osram
- CollectionElectronic and Electrical Engineering
- Accession NumberLDUSC-EE-54
- Alternative Number53
- Administration NameUCL Science and Engineering Collections
|
|