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History of Science Museum

N.B.1 Radio Valve Amplifier, by Marconiphone, London, c. 1924

Inventory Number 50683


Acknowledgement: © History of Science Museum, University of Oxford, inv.50683

Item type
Object
Provenance
Not ascertained
Primary inscriptions
Signed: "MARCONIPHONE/ 1 STAGE/ VOICE AMPLIFIER"; BBC stamp; and "G.P.O. REG. No. 3285", and on metal plaque inside box: ""MARCONIPHONE"/ ONE STAGE VOICE AMPLIFIER/ TYPE N.B.1 P.S. No. M 80/ INST No. SK1135 MARCONI'S WIRELESS/ TELEGRAPH Co. Ltd/ LONDON".
Object type
Radio communication
Dimensions
Height: 220mm Width: 200mm Depth: 195mm
Inventory No
50683

Description

Polished mahogany box with lid, for a single valve with at side a sliding resistance filament control. Nickel-plated fittings.