The GL-146 is a 125 watt triode with a mu of 75 made by GE. It was designed for zero bias operation to 15 MHz. The second example is an older version with different plate connection, insulator shape and baklite in the base and not ceramic.
Length = 9.00" Diameter = 2.50"
Max voltage = 1500
Max current = 200 ma
Fil voltage = 10
Fil current = 3.25 amps GOTO INDEX