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

Specialized - Cathode Ray ·CathodeRay

5CKP1A

Five-inch high-resolution cathode-ray tube with magnetic focusing and deflection, clear non-browning faceplate, and aluminized fine-grain phosphor screen. Designed for precision display and image-generation applications.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
B7-51
Socket code
EIGHTAR7
Base pins
7
Nominal heater
6.3 V / 600 mA

Description

5-inch high-resolution cathode-ray tube with magnetic focusing and magnetic deflection, a clear non-browning faceplate, and an aluminized fine-grain phosphor screen.

Socket description

Eightar 7-contact CRT base family

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
B7-51
Socket code
EIGHTAR7
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

B7-51 - 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 0

Cathode Ray

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

CRT electrode ratings, focusing/deflection data, capacitances, and operating voltages are 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

1951 Thomas Electronics

Published operating points and test conditions from this source.

SECTION 0

Cathode Ray

Characteristic

  • FocusingMethod

    Magnetic

  • DeflectionMethod

    Magnetic

  • Deflection Angle

    42 degree

  • Heater Voltage

    6.3 V

  • Heater Current

    600 mA

Other

  • MaximumMainAnodeOrAcceleratorVoltage

    22000 V

  • TypicalMainAnodeOrAcceleratorVoltage

    20000 V

  • MinimumAcceleratorVoltage

    10000 V

  • Maximum Grid2 Voltage

    1500 V

  • Typical Grid2 Voltage

    1000 V

  • Grid1CutoffVoltage

    -110 to -35 V

  • Maximum Heater Cathode Voltage

    180 V

Capacitance

  • Cathode To All Capacitance

    7 pF

  • Grid1 To All Capacitance

    12 pF