Ampera
EC8020
Dual Triode · IHT · 9-pin Noval · 1962
“Ultra-high Gm frame-grid.”
Medium-gain triode for driver and line stage applications
Datasheet ↗SPICE
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
Cgk0pF
Cgp0pF
Cpk0pF
GAIN55%
POWER20%
DRIVE99%
LINEARITY73%
TYPICAL OPERATING POINT
EXECUTIVE SUMMARY
The EC8020 is a dual indirectly-heated triode from Mullard, introduced around 1962. It provides a gain factor (μ) of 55 with 1100Ω plate resistance. Commonly used in preamp applications. Ultra-high Gm frame-grid.
APPLICATIONS
Push-pull outputVoltage amplifierHeadphone outputHigh-gain preampPhase splitter
Generic triode preamp stage
• Hi-Fi stereo• Headphone amp• Studio/recording
HISTORY
Introduced1962ManufacturerMullardEquivalentsNone
Late ProductionSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.37A
Max Plate Voltage200V
Max Power8W
Sensitivity50 mA/V
Gain Factor55
Internal Impedance1.1kΩ
Pinout9-pin Noval
Era1962
RarityRare
Input Capacitance5.5pF
Miller Capacitance0.04pF
Output Capacitance3pF