Russian tube GU-34B generator tetrode, it is used as a broadband amplifier of HF oscillations at frequencies up to 250MHz and with an output power of at least 400W
The Russian GMI-10 tetrode is designed for use in pulse modulators with anode pulse voltages up to 9kV and pulse currents exceeding 13A. The anode dissipation power is 41W. It is used in pulse radio transmitting devices