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

2AP1

Small high-vacuum cathode-ray tube with electrostatic focusing and electrostatic deflection and a green fluorescent screen. Tung-Sol documentation supports oscilloscope and general instrument-display use.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
11
Nominal heater
6.3 V / 600 mA

Description

High-vacuum cathode-ray tube with electrostatic deflection and focusing and a green fluorescent screen.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
11
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

No fixed ratings are recorded for this section.

CRT electrode-voltage and deflection ratings do not map cleanly to ordinary plate/screen promoted fields and are preserved in parameters.

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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Anode2VoltageMaximum

    1100 V

  • Anode2VoltageTypical

    500 V

  • ControlElectrodeVoltageMaximum

    590 V

Capacitance

  • Heater To Cathode Capacitance

    3.5 pF