The WE231D is a triode with a mu of 7.8 made by Western Electric. Length = 4.00" Diameter = 1.16" Max voltage = 135 Max current = 2.5 ma Fil voltage = 2.9 to 3.4 Fil current = .06 amps Data sheet: GOTO INDEX
The WE231D is a triode with a mu of 7.8 made by Western Electric.