RV25

Directly heated tungsten-cathode Telefunken power triode for larger audio amplifiers and transmitter modulator service. Rated for approximately 180 W plate dissipation and 1.8 kV plate voltage for substantial power output.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 13.6 V / 4.4 A

Description

The RV25 is a directly heated tungsten-cathode power triode developed for larger power amplifiers. It supports up to 1800 V plate operation and 180 W plate dissipation and is also described for modulating medium-power transmitting tubes.

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: 13.6 V
Nominal heater current: 4.4 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

Plate resistance: 2500 Ω
Transconductance: 0.003 S
Amplification factor: 6.7
Max plate voltage: 1800 V
Max plate dissipation: 180 W

Values published for 1800 V operating condition; designed as power amplifier and transmitter modulator.

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
-230 V
PlateVoltage=1800V
Plate current
100 mA
PlateVoltage=1800V

Characteristics

Penetration factor
15 %
Approximate

Application

Audio power class
Class A
Large loudspeaker installations