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Electronic Valve - Mullard, Pentode, Type EF37A, 1958 Object Reg. No: ST 028071

The EF37A was a low noise version of the EF36. It was intended for use in low level audio amplifying stages (A. F. amplifier).
This valve is branded 'Miniwatt' so presumably it was marketed under the Philips 'Miniwatt' brand. It has a date code (EP2/B8L) which indicates that it was made in Mullard's Blackburn works in December 1958
Manufactured by: Mullard, Blackburn, England.
Sharp cut-off; 6,3 Volt indirectly heated cathode
Tubular glass bulb with top cap and octal base with seven pins present. Bulb is coated with red metallic screening paint
Acquisition Information:
Unknown from Unknown, 1971
Discipline: Technology
Dimensions: 97 mm (Length), 32 mm (Diameter)

More information

Tagged with: thermionic electron valves
Themes this item is part of: Engineering Collection, Information & Communication Collection
Primary Classification: ELECTRONICS
Secondary Classification: Vacuum Technology
Tertiary Classification: amplification
Inscriptions: Bulb: EF37A/MADE IN/GREAT BRITAIN
Base: Miniwatt/EP2/B8L
Manufacturer: Mullard Radio Valve Co., Blackburn, Lancashire, England, Great Britain, 1958

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