Summary
Tetrode- diode; the diode in this valve was designed for use as the signal detector and the tetrode section was designed for use as the I.F. amplifier in radio receivers but was frequently used as a resistance coupled audio stage following the detector. 4.0 volt indirectly heated cathode.
Manufacturer: Philips, Holland
Physical Description
Base type: American style No. of pins in base: 6 Bulb shape: conical Bulb material: glass - gold coloured coating on glass envelope. Screw terminal top cap
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from I. C. Paterson, 15 Dec 1980
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Manufacturer
Philips (N.V. Philips Gloeilampenfabrieken), Holland, Netherlands, circa 1935
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Inscriptions
Bulb: PHILIPS / E444N / MINIWATT / MADE IN / HOLLAND / 55
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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
143 mm (Length), 50 mm (Outside Diameter)
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Keywords