6AQ8
Dual Triode · IHT · 9-pin Noval · 1958
“Frame-grid. Sharp.”
Medium-gain triode for voltage amplification applications
Datasheet ↗SPICE
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
GAIN60%
POWER6%
DRIVE90%
LINEARITY70%
TYPICAL OPERATING POINT
EXECUTIVE SUMMARY
The 6AQ8 is a dual indirectly-heated triode from Philips, introduced around 1958. It provides a gain factor (μ) of 60 with 10.0kΩ plate resistance. Commonly used in preamp applications. Frame-grid. Sharp.
APPLICATIONS
Voltage amplifierHigh-gain preampPhase splitter
Generic triode preamp stage
• Hi-Fi stereo• Headphone amp• Studio/recording
VS ECC85
HISTORY
Introduced1958ManufacturerPhilipsEquivalentsECC85
Golden AgeSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.3A
Max Plate Voltage300V
Max Power2.5W
Sensitivity6 mA/V
Gain Factor60
Internal Impedance10.0kΩ
Pinout9-pin Noval
Era1958
RarityModerate