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Tube Tinker — Electron Tube Database
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Specialized - Cathode Ray ·CathodeRay-CathodeRay

5AFP1

Five-inch electrostatic cathode-ray instrument tube with post-deflection acceleration, adjustable focusing, and published deflection sensitivity for oscilloscope and precision waveform display.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
2
Base
-
Socket code
B14A
Base pins
-
Nominal heater
6.3 V / 600 mA

Description

Dual-beam 5-inch flat-face electrostatic-focus and electrostatic-deflection cathode-ray tube with low trace interaction and high deflection accuracy.

Socket description

Large readout/Nixie 14-contact base, 44.5 mm pin circle

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B14A
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
600 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

2 physical sections, each with unique specifications.

Section 1

Cathode Ray

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

CRT electron-gun/display section; CRT-specific ratings and operating data are stored as parameters.

Section 2

Cathode Ray

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Second independent beam/gun section; same published electrical system.

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

1960 Du Mont

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Focusing method

    1 code

    Electrostatic

  • Deflection method

    1 code

    Electrostatic

  • Deflection factor D1-D2

    -

    Published range 54 to 66 V/in

  • Deflection factor D3-D4

    -

    Published range 48 to 60 V/in

Other

  • Accelerator voltage maximum

    3500 V

  • Accelerator voltage

    2000 V

  • Post-accelerator voltage maximum

    10500 V

  • Post-accelerator voltage

    4000 V

  • Grid No. 1 voltage

    -

    Published range -87 to -53 V

  • Grid No. 1 negative bias maximum

    200 V

Capacitance

  • Cathode to all other electrodes

    3.4 pF

    Approximate or first published bound

  • Grid No. 1 to all other electrodes

    3.2 pF

    Approximate or first published bound

SECTION 2

Cathode Ray

Characteristics

  • Focusing method

    1 code

    Electrostatic

  • Deflection method

    1 code

    Electrostatic

  • Deflection factor D1-D2

    -

    Published range 54 to 66 V/in

  • Deflection factor D3-D4

    -

    Published range 48 to 60 V/in

Other

  • Accelerator voltage maximum

    3500 V

  • Accelerator voltage

    2000 V

  • Post-accelerator voltage maximum

    10500 V

  • Post-accelerator voltage

    4000 V

  • Grid No. 1 voltage

    -

    Published range -87 to -53 V

  • Grid No. 1 negative bias maximum

    200 V

Capacitance

  • Cathode to all other electrodes

    3.4 pF

    Approximate or first published bound

  • Grid No. 1 to all other electrodes

    3.2 pF

    Approximate or first published bound