Designed about 30 years ago 200 MHz powerful pulse triode GI-54A has supplied Moscow Meson Factory DTL operation as a vacuum tube in the output power amplifier (PA). Last years in connection with the worsening of the economic situation in Russia and a complexity of the manufacture of GI-54A its production was ceased. Instead of GI-54A in CSC "SED-SPb" more simple and cheap vacuum tube was designed with output RF power up to 3 MW in pulse, anode power dissipation up to 120 kW and power gain about 10. In the paper results of the design and testing of the new generator triode in the PA of the MMF DTL RF system are described.