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Power - Pentode (NOT beam) ·Pentode

CK542DX

Subminiature battery power pentode for wearable equipment, producing roughly 3.75 mW from approximately 22.5 V.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
5J
Socket code
B5D
Base pins
5
Nominal heater
1.25 V / 15 mA

Description

Directly heated subminiature power-amplifier pentode for portable and wearable equipment.

Socket description

Subminiature wire-ended

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
5J
Socket code
B5D
Base pins
5
Nominal heater voltage
1.25 V
Nominal heater current
15 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

5J - 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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
150000 Ω
Transconductance
0.000325 S
Max plate voltage
30 V
Max cathode current
0.7 mA

Published subminiature operating-table characteristics; plate/screen voltages below are typical operating values, not promoted as maxima.

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

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • HeaterVoltageNominal

    1.25 V

    Nominal

  • HeaterCurrentNominal

    15 mA

    Nominal

  • Maximum Plate Voltage

    30 V

  • Maximum Cathode Current

    0.7 mA

Characteristic

  • Transconductance

    325 µS

    Typical

  • Plate Resistance

    150000 ohm

    Typical

Data set 02

195X Raytheon Special Purpose Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    22.5 V

  • Grid 1 voltage

    -2 V

  • Grid 2 voltage

    22.5 V

  • Plate current

    0.425 mA

  • Grid 2 current

    0.13 mA

  • Power output

    3.75 mW

  • Load resistance

    0.05 MOhm

Characteristic

  • Plate resistance

    0.15 MOhm

  • Transconductance

    325 uS