The 361A is a 100 watt triode with a mu of 12 made by United. About 1944, United renumbered it as the 261A that was the designation of the Western Electric original. This example was tested in 1941 and is marked 311CT on the lower insulation.
Length = 7.25" Diameter = 2.12"
Max voltage = 1250
Max current = 175 ma
Fil voltage = 10
Fil current = 3.25 amps GOTO INDEX