The TB-1 "Kenotron" was a regulator made for the U.S. Army Signal Corps in WWII. It had a 3 pin base and was used in a wind powered generator that was part of the SCR-68 radio set on aircraft.

Length = 4.00" Diameter = 1.62"
Max voltage = 250
Max current = 125 ma
Fil voltage = 10.75
Fil current = 1.45         GOTO INDEX