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RV258

Telefunken low-frequency power-amplifier triode developed as a higher-power successor to the RV218. Rated for approximately 32 W plate dissipation and 800 V plate voltage, with published audio output around 8.5 W.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 7 V / 1.1 A

Description

The RV258 is a low-frequency power-amplifier triode and successor to the RV218. Its higher allowable plate voltage and dissipation permit about 8.5 W output, with the sheet noting otherwise similar constants to the earlier type.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 7 V
Nominal heater current: 1.1 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Max plate voltage: 800 V
Max plate dissipation: 32 W

Source states same constants as RV218 except higher loading ratings; output up to about 8.5 W.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1959 Telefunken

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Audio output power
8.5 W
MaximumApproximate
Grid bias at 440 V plate
-60 V
PlateVoltage=440V
Grid bias at 800 V plate
-180 V
PlateVoltage=800V