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2
Non-Commercial Use
2
Category
Electronic Components
3
Maker
GEC Hirst Research Centre
3
Object type
semi conductor
2
triode
1
Place
United Kingdom
3
Material
metal, germanium
3
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Point contact germanium triode type EW51
circa 1950
Medium power germanium junction diode type EW54
circa 1950
sample pack of 10 point contact germanium triodes type EW 51. c.1950.
triode EW 51
circa 1950
