Fellows thermionic triode valve

Made:
1923 in England
Fellows thermionic triode valve

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Science Museum Group
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Fellows thermionic high frequency triode valve

Details

Category:
Radio Communication
Object Number:
Y7001.607
Materials:
plastic (unidentified), metal (unknown) and glass
Measurements:
overall: 112 mm 44 mm,
type:
thermionic valve and triode valve