Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Cathode Ray ·CathodeRay

5BRP7

Five-inch direct-view instrument CRT with electrostatic focusing, magnetic deflection, an aluminized P7 screen, and approximately 70-degree deflection. Its construction supports bright specialized monitoring and display applications.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
9HT
Socket code
NINAR9
Base pins
9
Nominal heater
6.3 V / 300 mA

Description

Five-inch direct-view CRT with electrostatic focus, magnetic deflection, aluminized screen, and approximately 70-degree deflection.

Socket description

Ninar 9-contact CRT/photomultiplier base family (JEDEC E9-37)

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
9HT
Socket code
NINAR9
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9HT - 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 highest published anode/accelerating voltage is promoted to MaxPlateVoltage; additional electrode, deflection, optical, and capacitance data are retained as 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

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Capacitance

  • Cathode to all other electrodes capacitance

    3 pF

  • Grid No. 1 to all other electrodes capacitance

    6.5 pF

Other

  • Maximum anode voltage

    10000 V

  • Grid No. 4 focus voltage range

    -550 to 1100 V

  • Maximum grid No. 2 voltage

    770 V

  • Peak heater-cathode voltage, heater negative

    180 V

  • Peak heater-cathode voltage, heater positive

    180 V

  • Typical anode voltage

    8000 V

  • Typical grid No. 4 focus voltage range

    -50 to 350 V

  • Typical grid No. 2 voltage

    300 V

  • Grid No. 1 cutoff voltage range

    -45 to -15 V

Characteristics

  • Typical line width

    0.014 in

  • Maximum undeflected spot-position radius

    0.25 in

CircuitValue

  • Grid No. 1 circuit resistance maximum

    1.5 MOhm