Summary
Triode heptode frequency changer. The very short leads provided by the all glass loctal construction allowed this valve to be used up to about 100MHz.
6.3 V indirectly heated cathode.
Manufacturer: Cossor, England
Physical Description
Tubular glass bulb on loctal base. Metal shell of the base is loose.
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Unknown Acquisition Method from Unknown Source, 1981
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Manufacturer
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Inscriptions
Bulb: (Cossor logo)/VALVE/7S7/BRITISH MADE/DVA/303 Paper label on bulb: 7S7
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Brand Names
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Classification
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Category
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Discipline
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Type of item
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Overall Dimensions
69 mm (Length), 30 mm (Outside Diameter)
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