Ampera
EL33
Pentode · IHT · Octal · 1938
“Classic octal output pentode. Rich harmonics.”
Power pentode delivering up to 15W in pentode, UL, or triode mode
TRANSCONDUCTANCE0mA/V
Cgk0pF
Cgp0pF
Cpk0pF
GAIN0%
POWER38%
DRIVE50%
LINEARITY75%
EXECUTIVE SUMMARY
The EL33 is a indirectly-heated pentode from Mullard·Philips, introduced around 1938. Commonly used in power (se) applications. Classic octal output pentode. Rich harmonics.
APPLICATIONS
Power output
Generic pentode power (se) stage
HISTORY
Introduced1938ManufacturerMullard·PhilipsEquivalents6M6G, CV1853
Pre-WarSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.9A
Max Plate Voltage400V
Max Power15W
Sensitivity9 mA/V
Gain Factor—
Internal Impedance—
PinoutOctal
Era1938
RarityModerate
Input Capacitance8pF
Miller Capacitance0.3pF
Output Capacitance8.5pF
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.