The RD12Tf is a 75 watt triode made for the German military in WWII for UHF applications to 600 MHz. They were used in pairs with a back to back socket in the FuG200 RADAR providing 35 KW pulses.
Length = 4.12" Diameter = 2.87"
Max voltage = 900
Max current = 250 ma
Fil voltage = 12.6
Fil current = .6 amp GOTO INDEX