Ampera
EL51
Pentode · IHT · 8-pin Side Contact P8A · 1950
“Big Philips power pentode. 45W capable.”
Power pentode delivering up to 25W in pentode, UL, or triode mode
TRANSCONDUCTANCE0mA/V
Cgk0pF
Cgp0pF
Cpk0pF
GAIN0%
POWER63%
DRIVE50%
LINEARITY75%
EXECUTIVE SUMMARY
The EL51 is a indirectly-heated pentode from Philips, introduced around 1950. Commonly used in power (se/pp) applications. Big Philips power pentode. 45W capable.
APPLICATIONS
Power output
Generic pentode power (se/pp) stage
HISTORY
Introduced1950ManufacturerPhilipsEquivalentsNone direct
Golden AgeSPECIFICATIONS
Heater Voltage6.3V
Heater Current1.2A
Max Plate Voltage400V
Max Power25W
Sensitivity14.5 mA/V
Gain Factor—
Internal Impedance—
Pinout8-pin Side Contact P8A
Era1950
RarityRare
Input Capacitance15pF
Miller Capacitance0.5pF
Output Capacitance8pF
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.