Ampera
6CK4
Dual Triode · IHT · 9-pin Noval · 1957
“Audio driver classic.”
Power triode delivering 12W for push-pull and SET designs
Datasheet ↗SPICE
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
Cgk0pF
Cgp0pF
Cpk0pF
GAIN7%
POWER30%
DRIVE99%
LINEARITY95%
TYPICAL OPERATING POINT
EXECUTIVE SUMMARY
The 6CK4 is a dual indirectly-heated triode from RCA, introduced around 1957. It provides a gain factor (μ) of 6.5 with 1080Ω plate resistance. Commonly used in driver applications. Audio driver classic.
APPLICATIONS
SET outputPush-pull outputHeadphone outputPhase splitter
Generic triode driver stage
• Headphone amp
HISTORY
Introduced1957ManufacturerRCAEquivalentsNone
Golden AgeSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.9A
Max Plate Voltage300V
Max Power12W
Sensitivity6 mA/V
Gain Factor6.5
Internal Impedance1.1kΩ
Pinout9-pin Noval
Era1957
RaritySought-after
Input Capacitance4.2pF
Miller Capacitance1.8pF
Output Capacitance2.5pF