1P24B Russian low frequency power output pentode tube. Equivalent of 507.

Name: 1P2B;

Type: output pentode;

Application: low frequency power amplification;

Cathode type: oxide, direct heating;

Envelope: glass, miniature;

Mass, g: 3;

Filament voltage, V: 1,25;

Filament current, A: 0,045-0,055;

Anode voltage, V: 45;

Grid1 voltage, V: minus 2;

Grid2 voltage, V: 45;

Steepness, mA/V: 0,5;

Socket type: flexible.