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Electronic Valve - Marconi Osram Valve Co, Triode, Type VR37, circa 1940. Object Reg. No: ST 029228

Triode, used as a detector, amplifier (Class A) or oscillator in mains powered receivers. Manufactured during the 1930s and 1940s by Valve Manufacturer Osram in England. VR37 is the British military designation for the MH4 triode manufactured by Marconi Osram Valve Company. It is also known as a CV1037. This valve was also manufactured in an external anode form called a Catkin.

4 volt indirectly heated cathode
Glass bulb, European standard 5 pin base.
Acquisition Information:
Donation from Mrs F. Jeffery, 1976
Discipline: Technology
Dimensions: 111 mm (Length), 45 mm (Diameter)

More information

Tagged with: thermionic electron valves, l12
Themes this item is part of: Engineering Collection, Information & Communication Collection
Primary Classification: ELECTRONICS
Secondary Classification: Vacuum Technology
Tertiary Classification: amplification
Inscriptions: Bulb: MADE & PATENTED IN ENGLAND/VR37/10E/9598
Manufacturer: Marconi Osram Valve Co., England, Great Britain, circa 1940

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