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!

Name: GU74B;

Type: tetrode;

Cathode type: oxide, indirect heating;

Application field: power amplification in broadcasting and SSB equipment;

Brief application: amplification;

Envelope: metall-ceramic;

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.