Ampera
EL37
Pentode · IHT · Octal · 1946
“Mullard flagship pentode. Massive gm.”
Power pentode delivering up to 25W in pentode, UL, or triode mode
TRANSCONDUCTANCE11.0mA/V
Cgk14.0pF
Cgp0.5pF
Cpk8.00pF
GAIN0%
POWER63%
DRIVE50%
LINEARITY75%
EXECUTIVE SUMMARY
The EL37 is a indirectly-heated pentode from Mullard, introduced around 1946. Commonly used in power (pp) applications. Mullard flagship pentode. Massive gm.
APPLICATIONS
Power output
Generic pentode power (pp) stage
HISTORY
Introduced1946ManufacturerMullardEquivalentsCV586
Golden AgeSPECIFICATIONS
Heater Voltage6.3V
Heater Current1.4A
Max Plate Voltage400V
Max Power25W
Sensitivity11 mA/V
Gain Factor—
Internal Impedance—
PinoutOctal
Era1946
RarityRare
Input Capacitance14pF
Miller Capacitance0.5pF
Output Capacitance8pF
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.