1.ISO9001:2008 &CE 2. glass triode, 3. anodes cooled by water, 4.from Soviet 5.output 30kw T-431A-type electron tubes are glass triodes, with their anodes cooled by water, and their maximum anode dissipation powers at 20kW; when at a frequency not higher than 25MHz, their output powers may attain to 30kW. They are mainly applied in industrial high-frequency heating equipments for oscillations or ...