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Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Cathode Ray ·CathodeRay

9AP4

No short description is recorded for this tube.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
2.5 V / 2.1 A

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
2.5 V
Nominal heater current
2.1 A
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 0

Cathode Ray

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

P4 white phosphor kinescope; 2.5 V 2.1 A heater, electrostatic focus, magnetic deflection.

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

9999 Mixed C 1000

Published operating points and test conditions from this source.

SECTION 0

Cathode Ray

Other

  • Heater/filament voltage

    2.5 V

    Heater voltage

  • Heater/filament current

    2.1 A

    Heater current

  • Maximum plate voltage

    7000 V

    Maximum high-voltage electrode (anode No.2)