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Voltage Pentode or Tetrode (under 100V) ·Tetrode-Tetrode

CK510AX

Directly heated subminiature double space-charge tetrode designed for cascaded audio-frequency voltage-amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
7D
Socket code
-
Base pins
7
Nominal heater
0.625 V / 50 mA

Description

Directly heated subminiature double space-charge tetrode for cascaded audio-frequency amplifier service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7D
Socket code
-
Base pins
7
Nominal heater voltage
0.625 V
Nominal heater current
50 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7D - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1ISAIS — Internal Screen

EIA transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7D

PIN2H—H — Heater

EIA transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7D

PIN32PBP — Plate (Anode)

EIA transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7D

PIN42KBK — Cathode

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7D

PIN51PAP — Plate (Anode)

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7D

PIN7H—H — Heater

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7D

PIN81KAK — Cathode

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7D

Section ratings

2 physical sections, each with unique specifications.

Section 1

Tetrode

X-ray radiationInterelectrode capacitances
Transconductance
0.000065 S
Max plate voltage
22.5 V
Max cathode current
0.5 mA

Published values are typical summary-table operating/characteristic data, not maximum ratings. Representative row for the two tetrode sections.

Section 2

Tetrode

X-ray radiationInterelectrode capacitances
Transconductance
0.000065 S
Max plate voltage
22.5 V
Max cathode current
0.5 mA

Second physical tetrode restored under one-row-per-physical-section policy.

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

Tetrode

Other

  • HeaterVoltageNominal

    0.78 V

    Nominal

  • HeaterCurrentNominal

    120 mA

    Nominal

  • Maximum Plate Voltage

    22.5 V

  • Maximum Cathode Current

    0.5 mA

Characteristic

  • Transconductance

    120 µS

    Typical

Data set 02

195X Raytheon Special Purpose Tubes

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Plate Voltage

    45 V

    Typical operating point; Voltage Amp.

  • Grid 1 Voltage

    0 V

    Typical operating point; Voltage Amp.

  • Plate Current

    0.06 mA

    Typical operating point; Voltage Amp.

  • Output Power

    150 mW

    Typical operating point; Voltage Amp.

  • Maximum Length

    1.25 in

    Maximum dimension

  • Maximum Width

    0.4 in

    Maximum dimension

  • Maximum Thickness

    0.285 in

    Maximum dimension