EF800 / EF802 / EF804 / EF804S

The EF800 series are pentode valves developed and designed by TELEFUNKEN specific for LF (Low frequency) with slightly larger noval base and also includes the tubes: EF802 , EF804 , EF804S, EF805S. This valve series is especially designed for Microphone and preamp use, pleasantly used by NEUMANN in its preamps and microphones. General features: HIGH plate resistance, very low noise and hum. For some models there are "S" (Special) versions with long life (declare for 10,000 hours), superior performative properties and selection; designed for public services such as the Federal Post Office.

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