Ampera
ECF80-T
Triode · IHT · 9-pin Noval · 1955
“Triode section.”
Medium-gain triode for driver and line stage applications
Datasheet ↗SPICE
GAIN FACTOR30
PLATE IMPEDANCE7.5kΩ
TRANSCONDUCTANCE4.0mA/V
Cgk2.0pF
Cgp1.5pF
Cpk0.50pF
GAIN30%
POWER4%
DRIVE93%
LINEARITY85%
TYPICAL OPERATING POINT
EXECUTIVE SUMMARY
The ECF80-T is a indirectly-heated triode from Philips, introduced around 1955. It provides a gain factor (μ) of 30 with 7500Ω plate resistance. Commonly used in preamp applications. Triode section.
APPLICATIONS
Voltage amplifier
Generic triode preamp stage
• Hi-Fi stereo• Headphone amp
HISTORY
Introduced1955ManufacturerPhilipsEquivalents6BL8
Golden AgeSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.44A
Max Plate Voltage200V
Max Power1.5W
Sensitivity4 mA/V
Gain Factor30
Internal Impedance7.5kΩ
Pinout9-pin Noval
Era1955
RarityCommon
Input Capacitance2pF
Miller Capacitance1.5pF
Output Capacitance0.5pF