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Power - Triode (over 1000V 100W) ·Triode

3X3000A1

Low-mu forced-air-cooled Eimac power triode intended for high-power audio-amplifier and modulator service. Published two-tube operation produces approximately 10 kW audio output from its 3 kW-dissipation external-anode structure.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
7.5 V / 51 A

Description

The EIMAC 3X3000A1 is a low-mu forced-air-cooled power triode for audio amplifier or modulator service.

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
7.5 V
Nominal heater current
51 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
0.011 S
Amplification factor
5.6
Max plate voltage
6000 V
Max plate dissipation
3000 W
Max grid dissipation
50 W
Max cathode current
3 A

Promoted from printed general-characteristics and maximum-ratings blocks.

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

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Amplification factor

    5.6

  • Transconductance

    11000 uS

Other

  • Maximum DC plate voltage

    6000 V

  • Maximum plate dissipation

    3000 W

  • Representative maximum-signal plate current

    3 A

Data set 02

1965 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Grid-Plate Capacitance

    17 pF

  • Grid-Filament Capacitance

    29 pF

  • Plate-Filament Capacitance

    2.5 pF

  • Frequency Maximum

    30 MHz

  • Typical Two-Tube AF Output Power

    10000 W