Summary
UV201A triode, made for R. C. A. in the United States. It was manufactured from 1922 to 1925. It is a general purpose valve.
In the 1920s, it would have been the most common electronic valve in the United States of America. It was used in most radios as an amplifier or detector. In those days, electronic valves and loudspeakers were sold separately from the radio; so people could choose the type they preferred.
It is electrically equivalent to valve types 201A and 01A. The filament uses 5 volts at 250 ma. Its mutual conductance is 725 micromho and its amplification factor is 8.
Physical Description
Conical glass bulb fitted with 4 short pin bayonet (UV) base. The valve is mounted in a brown bakelite socket.
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from P. Allen, 03 Feb 1982
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Manufacturer
Radio Corporation of America (RCA), Harrison, New Jersey, United States of America, 1924-1925
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Inscriptions
On top of bulb: RCA monogram. On side of base: RADIOTRON / UV201-A / LICENSED ONLY / TO EXTENT INDI- / CATED ON CARTON On underside of base: RADIOTRON / RCA monogram On top of socket mounting flange, clockwise: NA-ALD (monogram) - G PEND PAT. P + Underneath socket mounting flange, clockwise: BAKELITE 7 A.M. CO. / SP F LO MASS NO. 401
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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
109 mm (Length), 54 mm (Outside Diameter)
Mounted in socket
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Keywords
