6N9S Russian double triode tube. Equivalent to the 6SL7 / 6SL7GT / 6SU7 / 1579. Made by Reflector factory, USSR. NEW, NOS and never used before!

Name: 6N9S;

Type: Double triode;

Application: LF power amplification;

Cathode type: oxide, indirect heating;

Envelope: glass, miniature;

Filament voltage, V: 6.3;

Anode voltage, V: 250;

Filament current, mA: 300±25;

Anode current, mA: 2.3±0.9;

Differential transconductance, mA/V: 1.6±0.4;

IR: 44 kiloohm;

Gain constant: 70±15.