Ampera
6463
Dual Triode · IHT · 9-pin Noval · 1957
“Computer-rated twin triode. Audio Note favorite.”
Medium-gain triode for driver and line stage applications
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
GAIN20%
POWER6%
DRIVE96%
LINEARITY90%
EXECUTIVE SUMMARY
The 6463 is a dual indirectly-heated triode from GE·Telefunken, introduced around 1957. It provides a gain factor (μ) of 20 with 4000Ω plate resistance. Commonly used in preamp applications. Computer-rated twin triode. Audio Note favorite.
APPLICATIONS
Voltage amplifierPhase splitter
Generic triode preamp stage
• Hi-Fi stereo• Headphone amp
HISTORY
Introduced1957ManufacturerGE·TelefunkenEquivalentsE86CC, CV5304
Golden AgeSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.365A
Max Plate Voltage150V
Max Power2.5W
Sensitivity5 mA/V
Gain Factor20
Internal Impedance4.0kΩ
Pinout9-pin Noval
Era1957
RaritySought-after
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.