RV271A

Oxide-cathode Telefunken power triode for amplifier and modulator service. Rated for approximately 150 W plate dissipation and 1.5 kV plate voltage, with a published Class A operating point producing about 50 W.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 8 V / 1.5 A

Description

The RV271A is an oxide-cathode power triode intended for amplification and modulation. The sheet gives a normal Class-A point of 1500 V, 100 mA and about 50 W output, along with 150 W maximum plate dissipation.

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: 8 V
Nominal heater current: 1.5 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: 0.0048 S
Amplification factor: 8.5
Max plate voltage: 1500 V
Max plate dissipation: 150 W

Peak plate voltage rating 3000 V is retained as a parameter; 50 W normal Class-A output point published.

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

Peak plate voltage
3000 V
Plate voltage
1500 V
ClassA
Grid bias
-150 V
ClassA
Plate current
100 mA
ClassA
Grid signal voltage
100 V rms
ClassA
Load resistance
10000 Ohm
ClassA
Output power
50 W
ClassA;Distortion=10%

Capacitance

Input capacitance
11.5 pF
Output capacitance
1.1 pF
Grid-plate capacitance
5 pF