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

Voltage Pentode or Tetrode (under 100V) ·Pentode

CK5678

Pentode intended for voltage-amplifier or receiving service; available source does not clearly establish a narrower functional classification.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
5
Nominal heater
1.25 V / 50 mA

Description

CK5678 is identified in the supplied Raytheon handbook as a pentode.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
5
Nominal heater voltage
1.25 V
Nominal heater current
50 mA
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

Pentode

X-ray radiationInterelectrode capacitances
Max plate voltage
90 V
Max screen voltage
67.5 V
Max plate dissipation
0.28 W

Target handbook row and explicit cross-reference text reviewed.

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

195X Raytheon Special Purpose Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Grid resistor

    5 MOhm

    Published handbook row

  • Plate voltage

    67.5 V

    Published handbook row

  • Plate current

    1.8 mA

    Published handbook row

  • Screen current

    0.48 mA

    Published handbook row

Characteristic

  • Published characteristic value

    1

    Published handbook row