Summary

Triode designed for use as a grounded-grid amplifier in radar receivers. Used in World War II (1939-1945) radar systems.
Manufactured for the British Armed Services by one of many manufacturers. This valve was most probably made in England, However many British type valves were manufactured in the United States in the later years of the War, With no branding on the valve it is impossible to identify the source.
6.3 V indirectly heated cathode.

Physical Description

Cylindrical metal covered bulb with nine pin lock-in base.

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