Matched pair. Beam tetrode — 6P1P-EV serves to increase the power of low-frequency signals, which allows its use in the output stages of amplifiers and receivers, as well as in master generators and multipliers. The radio lamp is made in the form of a glass cylindrical bulb and can be operated in any position. Until 1985, the tetrode was produced in St. Petersburg. Basic technical characteristics Operating voltage supplied to the anode: 250 V. Nominal current in the anode circuit: 44 mA. Offset voltage on the first grid: — 12.5 V. Operating voltage on the second network: 250 V. Power developed in the anode circuit: 12 W. Weight of the tetrode: 20 g.