6N10S

Small Signal Triode — Octal

Known Equivalents & Substitutes

6SC76SC7GTVT-105CV693

Similar Tubes (Not Drop-In Compatible)

6N9S

Soviet equivalent of 6SL7GT — also a high-mu dual triode but with higher mu (70 vs 70) and different pinout

Different Octal dual triode — higher mu (70) and common cathode design vs separate cathodes on 6SC7/6N10S

Electrical Specifications

Absolute Maximum

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

Typical Operating

Anode Voltage (typical)Anode Voltage250V

Grid 1 Bias VoltageGrid Voltage-2V

Anode CurrentAnode Current2mA

Anode ResistanceAnode Resistance53,000Ω

TransconductanceTransconductance

Heater

Heater VoltageHeater Voltage6.3V

Heater CurrentHeater Current0.3A

Notes

Cyrillic designation: 6Н10С. Russian_equivalents.json confirms: 6N10S ≈ 6SC7.
The 6SC7 has separate cathodes for each triode section (unlike the 6SN7/6SL7 which share a common cathode connection pattern). Pin 1 = Grid 1, Pin 2 = Anode 1, Pin 3 = Grid 2, Pin 4 = Anode 2, Pin 5 = Cathode 2, Pin 7 = Heater, Pin 8 = Heater, Cathode 1 connects internally through pin arrangement.
High amplification factor (μ=70) makes it suitable for high-gain voltage amplifier and phase inverter stages.
From Tung-Sol datasheet: Va=250V, Vg=-2V, Ia=2mA, ra=53kΩ, gm=1325 µmhos, mu=70.

Pin Layout — Octal

1Grid (section 1)

2Anode (section 1)

3Grid (section 2)

4

References