TUBEOFILE
Search
Compare
FAQ
Tube+
Sign In
Sign In
☰
Loading...
6C5 — Small Signal Triode, Octal | Tubeofile | Tubeofile
← Browse
6C5
Small Signal Triode — Octal — RCA
···
+ Compare
⚡ Roll
Data: High
High quality — base, heater, all universal parameters present, and ≥50% of desirable parameters filled in. Safe to use for design decisions.
↗ r-type.org
↗ TDSL
↗ Radiomuseum
Known Equivalents & Substitutes
6C5G
6C5GT
6C5MG
CV1649
CV581
CV582
CV583
VT-65
6S5S
Similar Tubes (Not Drop-In Compatible)
12G4
Same electricals but 12.6V heater — not a drop-in in 6.3V circuits
6J5
Same mu (20) and similar operating point but different pinout (pin 3=plate vs pin 3=plate on 6C5; different grid/cathode pins) and different capacitances
6SN7
Twin triode version — each section has same electricals as 6C5, but dual-section Octal tube with different pinout
7A4
Electrically identical but Loctal base — not Octal compatible
Electrical Specifications
Absolute Maximum
Anode Voltage (max)
Max. Plate Voltage
300
V
Anode Dissipation (max)
Max. Plate Dissipation
2.5
W
Max Grid Resistor
Max. Grid Circuit Resistance
1
MΩ
Typical Operating
Anode Voltage (typical)
Plate Voltage
250
V
Notes
The 6C5, 6C5G, and 6C5GT are general-purpose triodes. With the exception of capacitances, their electrical characteristics are identical.
Similar in characteristics to the 6C6, 6J7, and 57 with triode connection.
The DC resistance in the grid circuit should not exceed 1.0 MΩ.
The 6S5S (6С5С) is the Soviet equivalent.
Pinout differs from the 6J5: on the 6C5 pin 3 = plate, pin 4 = grid, pin 5 = cathode; on the 6J5 pin 3 = anode, pin 5 = grid, pin 8 = cathode.
The 6C5 metal-shell version uses basing G-6Qb (6-pin octal with shell); the 6C5GT glass version uses basing 6Q.
Pin Layout — Octal
1
2
3
4
5
6
7
8
1
Metal Shell (Internal Shield)
2
Heater
3
Plate
4
Socket-Compatible Tubes
⚠ Not electrically compatible
12AX4
6AG7
6AH4
6B4G
CV1135
References
https://frank.pocnet.net/sheets/127/6/6C5.pdf
https://tdsl.duncanamps.com/show.php?des=6C5
Grid 1 Bias Voltage
Grid Voltage
-8
V
Anode Current
Plate Current
8
mA
Anode Resistance
Plate Resistance
10,000
Ω
Transconductance
Transconductance
2
mA/V
Amplification Factor (μ)
Amplification Factor
20
—
Capacitances
Grid-to-Plate Capacitance
Grid-to-Plate Capacitance (6C5)
2
pF
Grid-to-Cathode Capacitance
Grid-to-Cathode Capacitance (6C5)
3
pF
Anode-to-Cathode Capacitance
Plate-to-Cathode Capacitance (6C5)
11
pF
Heater
Heater Voltage
Heater Voltage
6.3
V
Heater Current
Heater Current
0.3
A
Grid
5
Cathode
6
No Connection
7
Heater
8
No Connection