Ampera
EF800
Pentode · IHT · 9-pin Noval · 1956
“Professional Telefunken pentode. Neumann mic tube.”
Small-signal pentode for low-noise voltage amplification
TRANSCONDUCTANCE0mA/V
Cgk0pF
Cgp0pF
Cpk0pF
GAIN0%
POWER5%
DRIVE50%
LINEARITY75%
EXECUTIVE SUMMARY
The EF800 is a indirectly-heated pentode from Telefunken, introduced around 1956. Commonly used in preamp / microphone applications. Professional Telefunken pentode. Neumann mic tube.
APPLICATIONS
Voltage amplifier
Generic pentode preamp / microphone stage
HISTORY
Introduced1956ManufacturerTelefunkenEquivalentsEF860, CV5092
Golden AgeSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.3A
Max Plate Voltage250V
Max Power2W
Sensitivity7.2 mA/V
Gain Factor—
Internal Impedance—
Pinout9-pin Noval
Era1956
RarityRare
Input Capacitance4.5pF
Miller Capacitance0.005pF
Output Capacitance5pF
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.