Summary
General purpose triode manufactured in the United States of America.
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.
This particular electronic valve has had its bulb removed to show the internal structure. It is located on a wooden display block with another electronic valve.
This item is mounted on the same display base as a complete example of this type of electronic valve.
Physical Description
Plastic base with four short pins in a ceramic insert. The bulb has been removed for display purposes This item is mounted on the same display base as ST 15930.2
More Information
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Collection Names
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Collecting Areas
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Manufactured For
Radiotron (RCA), United States of America, circa 1923
Manfactured by General Electric for RCA -
Inscriptions
The typewritten display label reads: R.C.A. Radiotron. Directly heated cathode, 5 V, 0.25 amps. Amplification factor 8 Plate resistance 10,000. This valve was widely used in its day. Base UV. Was also extensively used with the UX type base. 15486 15930
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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
85 mm (Length), 35 mm (Outside Diameter)