Summary
A109 triode. Manufacturer: Philips, Holland. Introduced in 1925.
General purpose triode designed for use with a single 1.5 volt cell for the filament supply. 1 to 1.3 volt directly heated cathode.
Physical Description
Conical glass bulb with 4 pin American style (UX) base. It appears that an attempt has been made to resolder the pins.
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
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Manufacturer
Philips (N.V. Philips Gloeilampenfabrieken), Holland, Netherlands, circa 1926
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Inscriptions
Bulb: A109/PHILIPS/Miniwatt/Sold for/amateur use only/1,0-1,3V/20-100V/Made in Holland
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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
91 mm (Length), 41 mm (Outside Diameter)
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Keywords