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

10FP4

Cathode-ray display tube with a 6.3 V heater and typical accelerator operation around 9 kV, intended for direct visual display with conventional grid-controlled beam intensity.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
B12A
Base pins
7
Nominal heater
6.3 V / 600 mA

Description

Ten-inch direct-view television cathode-ray tube with magnetic focus and magnetic deflection, metal-backed screen, and external conductive coating.

Socket description

Duodecal 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B12A
Base pins
7
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

1 physical section, each with unique specifications.

Section 1

Cathode Ray

X-ray radiationInterelectrode capacitances
Max plate voltage
10000 V

CRT accelerator/final-anode maximum mapped to MaxPlateVoltage.

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

1963 Rauland

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Heater voltage

    6.3 V

  • Heater current

    600 mA

  • Typical anode/accelerator voltage

    9000 V

  • Typical grid 2 voltage

    250 V

  • Maximum heater-cathode voltage

    125 V

    Heater positive to cathode

Capacitance

  • Cathode to all other electrodes capacitance

    8 pF