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RV239

High-efficiency Telefunken power triode for low-frequency amplification. Rated for approximately 32 W plate dissipation and 800 V plate voltage, with published output around 8–10 W and low internal resistance.

Directly heatedCold cathodeCommon cathodeDissimilar

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

Description

The RV239 is a power-amplifier triode intended for low-frequency amplification. The sheet emphasizes high efficiency, roughly 8-10 W of AC output, operation up to 800 V on the plate, and a comparatively low internal resistance that permits substantial load overmatching.

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

Transconductance: 0.0018 S
Amplification factor: 3.3
Max plate voltage: 800 V
Max plate dissipation: 32 W

Published approximate transconductance 1.8 mA/V and mu 3.3; low-frequency power amplifier service.

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

Grid bias at 440 V plate
-60 V
PlateVoltage=440V
Grid bias at 800 V plate
-180 V
PlateVoltage=800V
Audio output power
8-10 W
LowFrequencyPowerAmplifier
Grid signal voltage
125 V rms
Approximate