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Electronic Valve - Mullard, Pentode, Type EF55, 1961 Object Reg. No: ST 032529

Summary:
High gain pentode designed for use in wide-band amplifiers, for example, video amplifiers. CV173 is the military designation for this valve. 6.3 volt indirectly heated cathode, manufactured by Mullard Radio Valve Co. Blackburn, England.
Description:
Cylindrical metal can with 9 pin lock-in base. Can is painted black.
Acquisition Information:
Unknown from Unknown, 1981
Discipline: Technology
Dimensions: 94 mm (Length), 36 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: Can: (Mullard logo)/EF 55/"PENTONE"/TRADE MARK/(BVA logo)/BRITISH MADE/(broad arrow)/SD/CV173/KB-DA/D1Z/MADE IN/GT. BRITAIN
Stamped in metal round base: RV1 V1D/1050 MP4
Paper label on can: EF55
Manufacturer: Mullard Radio Valve Co., Blackburn, Lancashire, England, Great Britain, 1961

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