Edison Swan thermionic pentode valve

Made:
1930 in England
Edison Swan thermionic pentode valve

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

Edison Swan thermionic pentode valve

Mazda radio valve

Details

Category:
Radio Communication
Object Number:
Y7001.629
Materials:
cardboard, glass, plastic (unidentified) and metal (unknown)
Measurements:
overall: 140 mm 51 mm,
type:
valve