8000

Medium-mu transmitting power triode designed for substantial Class B and RF output. With 175 W plate dissipation and 2.75 kV capability, a push-pull pair can provide roughly 725 W in published Class B operation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: J4
Base pins: 4
Nominal heater: 10 V / 4.5 A

Description

The RCA 8000 is a high-power thoriated-tungsten triode for AF modulation and RF power service, with published push-pull Class B output up to about 725 W.

Socket description

Jumbo 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: J4
Base pins: 4
Nominal heater voltage: 10 V
Nominal heater current: 4.5 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

Amplification factor: 16.5
Max plate voltage: 2750 V
Max plate dissipation: 175 W

Published source values promoted where applicable; additional published values retained as parameters.

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

1950 General Electric Transmitting Types

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum full-rating frequency
30 MHz
Maximum signal power output
725 W
ClassB

Data set 02

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Maximum Full-Input Frequency
30 MHz
Maximum Reduced-Input Frequency
100 MHz

Other

Push-Pull Power Output
725 W
ClassB; TwoTubes