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

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