Marconi Osram thermionic diode valve

Marconi Osram thermionic diode valve

Marconi Osram thermionic diode valve
Science Museum Group
© The Board of Trustees of the Science Musuem

Marconiphone thermionic diode valve with cardboard box.

U35 GH 2

Details

Category:
Radio Communication
Object Number:
Y7001.684
Materials:
plastic (unidentified), glass, metal (unknown) and cardboard
Measurements:
overall: 100 mm 23 mm,
type:
thermionic valve and diode