Summary
Heptode (also called a pentagrid) used as a frequency changer in top-end radios and communications receivers and as a variable gain amplifier in audio equipment and instruments.
When used as a frequency changer a separate local oscillator was necessary.
The metal 6L7 was released in 1935 but this example appears to be of wartime production because it carries the military designation VT-87.
Manufactured by Radio Corporation of America, Harrison, New Jersey, USA.
6.3 V indirectly heated cathode.
Physical Description
Tubular metal bulb (with top cap) with 7 pin octal base.
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, 19 Apr 1972
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Manufacturer
Radio Corporation of America (RCA), Harrison, New Jersey, United States of America, 1940-1949
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Inscriptions
Bulb: (RCA logo)/U.S.A./VT-87/6L7
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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
76 mm (Length), 32 mm (Outside Diameter)
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