Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Power - Tetrode (NOT beam) (over 1000V 100W) ·Tetrode

6156

Beam-power tube intended for RF transmitting and power-amplifier service, combining moderate plate dissipation with useful high-frequency performance.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
5 V / 14.1 A

Description

Low-drive transmitting tetrode with sintered-glass base; an improved version of the 4-250A/5D22 family.

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
5 V
Nominal heater current
14.1 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

Tetrode

X-ray radiationInterelectrode capacitances
Amplification factor
5.1
Max plate voltage
4000 V
Max screen voltage
600 V
Max plate dissipation
250 W
Max cathode current
2.6 A

Published promoted ratings/characteristics captured where applicable; additional source values preserved in parameter rows.

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

1953 Amperex

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Maximum frequency at full ratings

    75 MHz

  • Reduced-rating frequency

    120 MHz

  • Peak cathode current maximum

    2.6 A

Characteristics

  • Grid-plate capacitance maximum

    0.11 pF

Data set 02

1958 Amperex Industrial

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

  • Amplification Factor

    6

  • Maximum frequency

    75 MHz

Other

  • Maximum plate dissipation

    250 W

  • Plate voltage

    3500 V

    ClassC

  • Plate current

    345 mA

    ClassC

  • Power output

    800 W

    ClassC

  • Grid voltage

    -500 V

    ClassC

  • Grid current

    20 mA

    ClassC

  • Screen voltage

    600 V

    ClassC

Data set 03

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Plate voltage

    3000 V

    RFPowerAmplifier

  • Plate current

    345 mA

    RFPowerAmplifier

  • Power output

    800 W

    RFPowerAmplifier

  • Control-grid voltage

    -180 V

    RFPowerAmplifier

  • Grid current

    10 mA

    RFPowerAmplifier

  • Screen voltage

    500 V

    RFPowerAmplifier

  • Maximum frequency at full input

    75 MHz

    RFPowerAmplifier

Capacitance

  • Grid-to-plate capacitance

    0.12 pF

    Section1

  • Input capacitance

    12.9 pF

    Section1

  • Output capacitance

    4.5 pF

    Section1