Wireless valve, admiralty pattern 7405A made by the Mullard

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Wireless valve, admiralty pattern 7405A made by the Mullard
Science Museum Group
© The Board of Trustees of the Science Museum

Wireless valve, admiralty pattern 7405A made by the Mullard Radio Valve Company Limited, Mitcham in May 1940. Type NR16A. Tested at the H.M Signal School, Portsmouth.

Details

Category:
Acoustics
Object Number:
1947-224/56
type:
valve
credit:
Admiralty (Tactical & Staff Duties Division)