Edison Swan thermionic triode valve

Made:
1932 in England
Edison Swan thermionic triode valve

Edison Swan thermionic triode valve
Science Museum Group
© The Board of Trustees of the Science Musuem

Edison Swan thermionic triode valve in cardboard box

AR.06 dull emitting low temperature valve

Details

Category:
Radio Communication
Object Number:
Y7001.709
Materials:
glass, plastic (unidentified), metal (unknown) and cardboard
Measurements:
overall: 132 mm x 60 mm x 60 mm,
type:
thermionic valve and triode valve