The GU-74b / 4CX800A Svetlana tetrode is used in wide-band non-tunable amplifiers and for single-sideband power amplification in stationary and mobile RF equipment. It is useful at full ratings through 250MHz. The GU-74b is fully equivalent to the modern 4CX800A tube. Tube is NEW, NOS and never used before!
Cathode type: oxide, indirect heating;
Application field: power amplification in broadcasting and SSB equipment;
Brief application: amplification;
Cooling method: forced air;
Dimensions: 90mm x 71mm;
Mass: 0.55 kg;
Filament voltage: 12.6 V;
Filament current: 3.3 - 3.9 A;
Mutual conductance: 26 to 38 mA/V;
Output power: 0.6 kW;
Maximum anode voltage: 2kV/4kV in peak;
Maximum operating frequency: 150MHz.