6S41S

Power Triode — Octal

Known Equivalents & Substitutes

No known equivalents. If you know of any, use the ⚑ Report Issue button above.

Similar Tubes (Not Drop-In Compatible)

Higher-power Soviet regulator triode — similar application but much higher current capability (up to 600mA)

6S4S

Soviet equivalent of 6B4G — different characteristics but similar single power triode concept

Electrical Specifications

Absolute Maximum

Anode Voltage (max)Anode Voltage (max)250V

Anode Dissipation (max)Anode Dissipation (max)24W

Cathode Current (max)Cathode Current (max)200mA

Max Grid ResistorMax Grid Resistor0.5MΩ

Typical Operating

Anode Voltage (typical)Anode Voltage150V

Grid 1 Bias VoltageGrid Voltage-6V

Anode CurrentAnode Current100mA

Anode ResistanceAnode Resistance350Ω

TransconductanceTransconductance

Heater

Heater VoltageHeater Voltage6.3V

Heater CurrentHeater Current3A

Notes

Cyrillic designation: 6С41С. No direct Western equivalent exists.
Originally designed as a series regulator pass tube for voltage stabilizers, but adopted by audiophiles for single-ended amplifier output stages.
Indirectly heated with a heavy-duty cathode capable of high continuous current.
The tube has a relatively low plate resistance making it suitable for direct-coupled cathode follower designs.
Available in standard and ruggedized variants.

Pin Layout — Octal

1No Connection

2Heater

3Anode

4

Socket-Compatible Tubes ⚠ Not electrically compatible

References