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From the collection of The Ed Muirhead Physics Museum

469 Items featured online

Marconi Valve, Transmitting, with stand

Untitled image

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Physical description

Valve has wooden (possibly mahogany) display stand.

Inscriptions & markings

On glass: “Marconi Valve, patented, Made in England Cat.2 67.5” Detached accompanying label (partially torn): “Valve Type - CAT 2, Serial No: 575 Anode? For: 5.0 Amp Emission: 9? Operate filament A? 19.2 volts 51. ?”