A two-anode glass-encased kentron with a common indirect-heated cathode designed to operate as a low-power rectifier in radio engineering devices. The tube is designed for direct conversion of alternating current to direct current. This tube is popular among retro audio and radio electronics enthusiasts for its sound and unique characteristics. • Heating current (heating voltage 6.3V): minimum 405 mA, nominal 450 mA, maximum 495 mA • Anode current (Ua = 50V) ? 150mA • Rectified current (effective transformer voltage: 2 x 350V, Rn = 5.2k?, C = 8mkF) ? 72mA • Leakage current between cathode and heater: ? 60mkA • Cathode-heater insulation resistance: 6.7 M? • Heating voltage: 6 - 6.6V • Reverse voltage: 900V • Cathode-heater voltage: at positive heater potential 100V, at negative heater potential 400V • Anode current amplitude value: 250V • Durability ? 5000 hours • Tube bulb temperature: 150 degrees Celsius • Operating temperature range: -60... +190 degrees Celsius • Relative humidity: 0 … 98% Approximate analogues for the 6C4P-EV: 6Z4, 6BW4 EY84=6374=6443=R18 EZ82 EZ90=E90Z=EZ900=6BX4=6X4(W)=6Z31=6063=6202=U707=U78 HZ90=12X4 Attention! If the 6C4P-EV tube is to be used as an analogues for the above-mentioned tubes types, please carefully read the datasheet before replacement. Analogues may differ in terms of characteristics, connection diagrams, sockets, or tube designs.