Accession No

2025

Brief Description

valve, by Mullard, English, 1/4 20th Century

Origin

England

Maker

Mullard

Class

physics (?)

Earliest Date

1900

Latest Date

1925

Inscription Date

Material

glass; metal (white metal, copper); plastic

Dimensions

length 160mm; max diameter 50mm

Special Collection

Cavendish collection

Provenance

Transferred from Cavendish Laboratory, University of Cambridge, 1974.

Inscription

‘Trade Mark
Radio MULLARD Valve
SERIAL No. 9
SWO 1447’ (etched onto surface of glass)

Description Notes

Glass bulb containing white metal and glass vlave, the main component ofwhich is a white metal cylinder through which passes a white metal coil. Wires emerging from bulb are copper and are insulated with plasticised cloth.

Condition fair; complete.

References

Events