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6N10S — Small Signal Triode, Octal | Tubeofile
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6N10S
Small Signal Triode — Octal
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↗ Radiomuseum
Known Equivalents & Substitutes
6SC7
6SC7GT
VT-105
CV693
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
6SL7
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)
250
V
Typical Operating
Anode Voltage (typical)
Anode Voltage
250
V
Grid 1 Bias Voltage
Grid Voltage
-2
V
Anode Current
Anode Current
2
mA
Anode Resistance
Anode Resistance
53,000
Ω
Transconductance
Transconductance
Heater
Heater Voltage
Heater Voltage
6.3
V
Heater Current
Heater Current
0.3
A
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
1
2
3
4
5
6
7
8
1
Grid (section 1)
2
Anode (section 1)
3
Grid (section 2)
4
References
https://frank.pocnet.net/sheets/127/6/6SC7.pdf
https://www.radiomuseum.org/tubes/tube_6n10s.html
1.325
mA/V
Amplification Factor (μ)
Amplification Factor (μ)
70
—
Anode (section 2)
5
Cathode (section 2)
6
Cathode (section 1)
7
Heater
8
Heater