Ampera
ECC85
Dual Triode · IHT · 9-pin Noval · 1955
“VHF dual triode.”
Medium-gain triode for voltage amplification applications
Datasheet ↗SPICE
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
Cgk0pF
Cgp0pF
Cpk0pF
GAIN60%
POWER6%
DRIVE90%
LINEARITY70%
TYPICAL OPERATING POINT
EXECUTIVE SUMMARY
The ECC85 is a dual indirectly-heated triode from Philips, introduced around 1955. It provides a gain factor (μ) of 60 with 10.0kΩ plate resistance. Commonly used in rf / preamp applications. VHF dual triode.
APPLICATIONS
Voltage amplifierHigh-gain preampPhase splitter
Generic triode rf / preamp stage
• Hi-Fi stereo• Headphone amp• Studio/recording
VS 6AQ8
HISTORY
Introduced1955ManufacturerPhilipsEquivalents6AQ8
Golden AgeSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.465A
Max Plate Voltage250V
Max Power2.5W
Sensitivity6 mA/V
Gain Factor60
Internal Impedance10.0kΩ
Pinout9-pin Noval
Era1955
RarityCommon
Input Capacitance2.7pF
Miller Capacitance2pF
Output Capacitance0.5pF