Ampera
EL11
Pentode · IHT · 8-pin Side Contact Y8A · 1938
“Side-contact Stahlroehre. Warm, rich.”
Small-signal pentode for low-noise voltage amplification
TRANSCONDUCTANCE0mA/V
Cgk0pF
Cgp0pF
Cpk0pF
GAIN0%
POWER23%
DRIVE50%
LINEARITY75%
EXECUTIVE SUMMARY
The EL11 is a indirectly-heated pentode from Telefunken·Philips, introduced around 1938. Commonly used in power (se) applications. Side-contact Stahlroehre. Warm, rich.
HISTORY
Introduced1938ManufacturerTelefunken·PhilipsEquivalentsNone direct
Pre-WarSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.9A
Max Plate Voltage250V
Max Power9W
Sensitivity9 mA/V
Gain Factor—
Internal Impedance—
Pinout8-pin Side Contact Y8A
Era1938
RaritySought-after
Input Capacitance10pF
Miller Capacitance0.3pF
Output Capacitance8pF
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.