Ampera
E280F
Pentode · IHT · 9-pin Noval · 1962
“Small-current professional pentode.”
Small-signal pentode for low-noise voltage amplification
TRANSCONDUCTANCE0mA/V
GAIN0%
POWER4%
DRIVE50%
LINEARITY75%
EXECUTIVE SUMMARY
The E280F is a indirectly-heated pentode from Siemens, introduced around 1962. Commonly used in preamp applications. Small-current professional pentode.
APPLICATIONS
Voltage amplifier
Generic pentode preamp stage
HISTORY
Introduced1962ManufacturerSiemensEquivalentsNone
Late ProductionSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.175A
Max Plate Voltage250V
Max Power1.5W
Sensitivity6.5 mA/V
Gain Factor—
Internal Impedance—
Pinout9-pin Noval
Era1962
RarityRare
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.