6C4P — Rectifier, Noval | TubeofileKnown Equivalents & Substitutes
Similar Tubes (Not Drop-In Compatible)
12.6V heater version — same electricals but incompatible heater voltage 6C5S
Soviet 6X5GT equivalent — similar function but Octal base, not NovalElectrical Specifications
Absolute Maximum
Heater-to-Cathode Voltage (max)Heater-to-Cathode Voltage (max DC)450V
Rectifier
Peak Inverse VoltagePeak Inverse Voltage1,250V
Voltage Drop (typical)Tube Voltage Drop (at 70mA)22V
DC Output Current (max)DC Output Current (max per plate)70mA
Heater
Heater VoltageHeater Voltage6.3V
Heater CurrentHeater Current0.6A
Absolute Maximum
Heater-to-Cathode Voltage (max)Heater-to-Cathode Voltage (max DC)450V
Rectifier
Peak Inverse VoltagePeak Inverse Voltage1,250V
Notes
- Cyrillic designation: 6Ц4П. Foreign_substitutes.json confirms: 6C4P → 6X4, 6Z31, EZ90.
- Also available as 6C4P-EV (6Ц4П-ЕВ) — military extended-life variant.
- From 6X4 Tung-Sol datasheet: Vh=6.3V, Ih=600mA, PIV=1250V, DC output 70mA max per plate.
- Tube voltage drop approximately 22V at 70mA per plate.
- The 6X4 is identical to the 12X4 except for heater ratings.
Pin Layout — Noval
1Anode (plate 1)
2No Connection
3No Connection
Voltage Drop (typical)Tube Voltage Drop (at 70mA)
22V
DC Output Current (max)DC Output Current (max per plate)70mA