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

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.
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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