Ampera
EF806S
Pentode · IHT · 9-pin Noval · 1955
“Special quality EF86. Ultra-low noise.”
Small-signal pentode for low-noise voltage amplification
TRANSCONDUCTANCE0mA/V
Cgk0pF
Cgp0pF
Cpk0pF
GAIN0%
POWER3%
DRIVE50%
LINEARITY75%
EXECUTIVE SUMMARY
The EF806S is a indirectly-heated pentode from Telefunken, introduced around 1955. Commonly used in preamp applications. Special quality EF86. Ultra-low noise.
APPLICATIONS
Voltage amplifier
Generic pentode preamp stage
VS EF86
Pd 0%Full comparison →
HISTORY
Introduced1955ManufacturerTelefunkenEquivalentsEF86, 6267
Golden AgeSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.2A
Max Plate Voltage300V
Max Power1W
Sensitivity2.2 mA/V
Gain Factor—
Internal Impedance—
Pinout9-pin Noval
Era1955
RaritySought-after
Input Capacitance3.8pF
Miller Capacitance0.005pF
Output Capacitance6pF
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.