Perfect replace for 1/2 6N30P-DR or 6N30P-EV ( when Pa < 2.5W and Ua < 180V).
2 pcs of 6S31B-R tubes are near equivalent to 1 pcs of 6N30P-DR!
Name: 6S31B-R / 6С31Б-Р;
Type: triode, hi-durable;
Application: LF voltage amplification;
Cathode type: oxide, indirect heating;
Envelope: glass, miniature;
Mass, g: 4,5;
Filament voltage, V: 6,3;
Filament current, A: 0,2-0,24;
Anode voltage, V: 50;
Anode current, A: 0,03-0,05;
Anode power, W: 2,5;
Grid1 voltage, V: 0;
Steepness, mA/V: 13,0-24,0;
Reverse grid current, uA: 0,2;
Microphnic noise, mV: 15;
Gain: 12,0-22,0;
Socket type: flexible;
Lifetime: more 5000 hours.
NEW, NOS and never used before!
