EF94
Pentode · IHT · 7-pin Miniature · 1950
“Miniature preamp pentode.”
Small-signal pentode for low-noise voltage amplification
Datasheet ↗SPICE
TRANSCONDUCTANCE0mA/V
GAIN0%
POWER8%
DRIVE50%
LINEARITY75%
EXECUTIVE SUMMARY
The EF94 is a indirectly-heated pentode from Philips, introduced around 1950. Commonly used in preamp applications. Miniature preamp pentode.
APPLICATIONS
Voltage amplifier
Generic pentode preamp stage
HISTORY
Introduced1950ManufacturerPhilipsEquivalents6AU6 class
Golden AgeSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.1A
Max Plate Voltage250V
Max Power3W
Sensitivity2.2 mA/V
Gain Factor—
Internal Impedance—
Pinout7-pin Miniature
Era1950
RarityCommon