Ampera
EL50
Pentode · IHT · 8-pin Side Contact P8A · 1938
“Philips cinema pentode. EL34 predecessor.”
Power pentode delivering up to 18W in pentode, UL, or triode mode
TRANSCONDUCTANCE0mA/V
Cgk0pF
Cgp0pF
Cpk0pF
GAIN0%
POWER45%
DRIVE50%
LINEARITY75%
EXECUTIVE SUMMARY
The EL50 is a indirectly-heated pentode from Philips, introduced around 1938. Commonly used in power (se) applications. Philips cinema pentode. EL34 predecessor.
APPLICATIONS
Power output
Generic pentode power (se) stage
HISTORY
Introduced1938ManufacturerPhilipsEquivalents4654
Pre-WarSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.9A
Max Plate Voltage400V
Max Power18W
Sensitivity7 mA/V
Gain Factor—
Internal Impedance—
Pinout8-pin Side Contact P8A
Era1938
RarityRare
Input Capacitance10pF
Miller Capacitance0.4pF
Output Capacitance7.5pF
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.