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

Specialized - Cathode Ray ·CathodeRay

7ATP7

Seven-inch P7 cathode-ray instrument tube for oscillographic or measurement display, with manufacturer-specified focusing, deflection, accelerating-voltage, and phosphor characteristics.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
-

Description

7-inch cathode-ray tube for radar and oscillographic applications with electrostatic focus and deflection, long persistence, and post acceleration for high brightness and sensitivity.

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
-
Nominal heater current
4 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 1

Cathode Ray

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Promoted fields mapped by printed headings; additional data retained 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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Heater VOlbage o o v o o o « « o o o 0 a o o o o o o » « « o«

    643 V

    Published datasheet line; semantic text-layer recovery

  • OVeI‘—all Length o ° ° [ [ °© [ © L] ° L] L] ° ° o ° ° - .}.7—1/8 _t 3/

    8 in

    Published datasheet line; semantic text-layer recovery

  • Greatest Bulb Diameter. « o « » o « « o o « o « « o o7-3/8 + 3/16

    1 in

    Published datasheet line; semantic text-layer recovery

  • Minimum Useful Screen Diameter . « o o « o o & e e @ - - L]

    6.5 in

    Published datasheet line; semantic text-layer recovery

  • J1-22 Contact Aligns with Trace of D1-D2 +

    10 deg

    Published datasheet line; semantic text-layer recovery

  • D1-D2 Trace Aligns with Pin.No. 5 and Tube Axis +

    10 deg

    Published datasheet line; semantic text-layer recovery

  • Angle Between D3-Dl and DI-D2 Traces o« o o o o « « « o 90 +

    1 deg

    Published datasheet line; semantic text-layer recovery

  • Post Accelerator Voltage . e e . « L,

    0 V

    Published datasheet line; semantic text-layer recovery

  • hnode VOLlLage o o o o o o ¢ o « o « o o « o « o o o « +« o 2,

    0 V

    Published datasheet line; semantic text-layer recovery

  • Focusing Electrode Voltage 392 to

    672 V

    Published datasheet line; semantic text-layer recovery

  • Grid No. 1 Voltaged o « « o o = « o « « « s o o« o o « b0 to =

    80 V

    Published datasheet line; semantic text-layer recovery

  • Dl and D2 & & 4 6 « o « s o o« » o s o s » o « s o« o 12 to

    108 V

    Published datasheet line; semantic text-layer recovery

  • D3 and Dh o o v 4 ¢« « 4 4 o 4 « 6 s 0o s e s e s« 6Lto

    9 V

    Published datasheet line; semantic text-layer recovery

  • With post accelerator anode voltage of 4,

    0 V

    Published datasheet line; semantic text-layer recovery

  • 2. BULB CONTACT ALIGNS WITH PIN NO.5 POSITION

    10 deg

    Published datasheet line; semantic text-layer recovery