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Specialized - Cathode Ray ·CathodeRay

3BQP2

Three-inch rectangular-face cathode-ray tube for small lightweight oscillograph applications, using encapsulated axial leads. This variant uses a P2 blue-green/green, long persistence screen for its characteristic trace persistence.

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

Description

The Du Mont 3BQP2 is a rectangular-face CRT for small lightweight oscillograph applications with encapsulated axial leads. This variant uses a P2 screen with blue-green/green fluorescence and long persistence.

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
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.

Cathode-ray display/electron-gun section.

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

  • Heater Voltage

    6.3 V

  • Heater Current

    600 mA

  • Focusing Method

    Electrostatic text

  • Deflection Method

    Electrostatic text

  • Phosphor

    P2 text

  • Fluorescence

    Blue-green/green text

  • Persistence

    Long text