Summary
High mu triode intended for use in resistance coupled audio amplifiers in radios and amplifiers. Introduced in 1927.
5.0 V directly heated cathode.
Manufactured for: RCA, USA.
Used as a Class A amplifier and equivalent to valve type 40.
Physical Description
Conical globe bulb on 4 pin UX style base.
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from G. H. Williams, 12 Jun 1973
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Manufacturer
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Inscriptions
Bulb: (RCA logo in circle) Base: RADIOTRON/UX 240
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Brand Names
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Classification
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Category
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Type of item
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Overall Dimensions
111 mm (Length), 45 mm (Outside Diameter)
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Overall Dimensions
112 mm (Length), 45 mm (Outside Diameter)
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Keywords