The Russian powerful generator tetrode GU-84B tube ceramic-metal for power amplification at frequenciesup to 250MHz with an output power of at least 1.5kW
G-807 (807) Tube, output beam tetrode. Brown base. Great vintage sound! Analog to the 807 (Sylvania), VT-100, QE06/50. Near equivalent: 6BG6G, 1625 and 5933