Summary
Sharp cut-off tetrode designed for use as an RF amplifier in mains powered radios.
4 V indirectly heated cathode.
Manufactured by Philips, Holland
Physical Description
Conical glass bulb on five pin UY style base with top cap missing.
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
Paper label on base: E442 Bulb: PHILIPS/E442/S/4V * MINIWATT 200V/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
116 mm (Length), 46 mm (Outside Diameter)
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Keywords