6DN7
Dual Triode · IHT · Octal · 1957
“Dissimilar dual octal. Bottlehead favorite.”
Power triode delivering 10W for push-pull and SET designs
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
GAIN23%
POWER25%
DRIVE98%
LINEARITY89%
EXECUTIVE SUMMARY
The 6DN7 is a dual indirectly-heated triode from RCA·GE, introduced around 1957. It provides a gain factor (μ) of 22.5 with 2000Ω plate resistance. Commonly used in driver + power applications. Dissimilar dual octal. Bottlehead favorite.
APPLICATIONS
SET outputPush-pull outputPhase splitter
Generic triode driver + power stage
• Hi-Fi stereo• Headphone amp
HISTORY
Introduced1957ManufacturerRCA·GEEquivalentsNone standard
Golden AgeSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.9A
Max Plate Voltage400V
Max Power10W
Sensitivity7.5 mA/V
Gain Factor22.5
Internal Impedance2.0kΩ
PinoutOctal
Era1957
RarityModerate
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.