Ampera
6U8A-T
Triode · IHT · 9-pin Noval · 1955
“Triode section.”
Medium-gain triode for driver and line stage applications
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
Cgk0pF
Cgp0pF
Cpk0pF
GAIN33%
POWER6%
DRIVE93%
LINEARITY84%
EXECUTIVE SUMMARY
The 6U8A-T is a indirectly-heated triode from RCA, introduced around 1955. It provides a gain factor (μ) of 33 with 7500Ω plate resistance. Commonly used in preamp applications. Triode section.
APPLICATIONS
Voltage amplifier
Generic triode preamp stage
• Hi-Fi stereo• Headphone amp
HISTORY
Introduced1955ManufacturerRCAEquivalentsECF82
Golden AgeSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.45A
Max Plate Voltage150V
Max Power2.5W
Sensitivity4.4 mA/V
Gain Factor33
Internal Impedance7.5kΩ
Pinout9-pin Noval
Era1955
RarityCommon
Input Capacitance2.2pF
Miller Capacitance2pF
Output Capacitance0.6pF
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.