Ampera
EL91
Pentode · IHT · 7-pin Miniature · 1950
“Small audio output.”
Small-signal pentode for low-noise voltage amplification
TRANSCONDUCTANCE0mA/V
Cgk0pF
Cgp0pF
Cpk0pF
GAIN0%
POWER10%
DRIVE50%
LINEARITY75%
EXECUTIVE SUMMARY
The EL91 is a indirectly-heated pentode from Philips, introduced around 1950. Commonly used in power applications. Small audio output.
APPLICATIONS
Voltage amplifier
Generic pentode power stage
HISTORY
Introduced1950ManufacturerPhilipsEquivalents6AM5
Golden AgeSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.2A
Max Plate Voltage250V
Max Power4W
Sensitivity6 mA/V
Gain Factor—
Internal Impedance—
Pinout7-pin Miniature
Era1950
RarityModerate
Input Capacitance5.5pF
Miller Capacitance0.15pF
Output Capacitance3.5pF
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.