Summary
De Forest Audion DL5 electronic valve.
The L signifies that the base has long pins (UX style base).
The tube used for detection and amplification in accumulator (rechargeable) powered radio receivers, made by De Forest In America, circa 1926.
The valve has a directly heated cathode with a filament voltage of 5V.
Physical Description
Isolantite 4 pin base
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from Mr Finlayson (Fin) Stewart, 14 Jun 1973
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Manufacturer
De Forest Radio Company, Jersey City, New Jersey, United States of America, 1926
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Inscriptions
On bottom of base: Serial number 10276 On side of base: De Forest/Reg U.S. Pat. Off./AUDION/Reg U.S. Pat. Off./Patented as shown on carton/Isolantite base
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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
110 mm (Length), 35 mm (Outside Diameter)
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References
[Book] Tyne, Gerald F. 1987. Saga of the Vacuum Tube., 1977, 301 - 302 Pages
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Keywords