Summary
2.5 volt directly heated cathode, manufactured for Philips, Australia by an unknown manufacturer in the USA. Power pentode for use in the output stages of radio receivers (as a class A power amplifier). This example was presumably bought in by Philips to service the replacement market after they had stopped making them.
Physical Description
Shouldered glass bulb mounted on a 5 pin UY style 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, 1981
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Manufactured For
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Place & Date Manufactured
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Inscriptions
Bulb: PHILIPS/47/RADIO/MADE IN/U.S.A. Paper label on base: 47
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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
132 mm (Length), 51 mm (Outside Diameter)
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Keywords