Rare 1540 FOTON output beam tetrode tube. Equivalent to the 6P3S-E, 6L6GT, 5881. NEW, NOS and never used before!

Name: 1540;

Type: Output beam tetrode;

Application: LF power amplification;

Cathode type: oxide, indirect heating;

Envelope: glass;

Mass, g: 70;

Filament voltage, V: 6.3;

Filament current, A: 0.84-0.92;

Anode voltage, V: 250;

Anode current, A: 0.06-0.086;

Anode power, W: 20.5;

Grid1 voltage, V: minus 14;

Grid2 voltage, V: 250;

Steepness, mA/V: 5.2-6.8;

Reverse grid current, uA: 0.5;

Microphnic noise, mV: 750;

Socket type: rsh5-1