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Specialized - Cathode Ray ·CathodeRay

7TD3A

Seven-inch cathode-ray radar display tube documented by Cintel. Its datasheet specifies focusing and deflection systems, phosphor and afterglow behavior, capacitances, and operating ratings for radar indication.

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

Description

7TD3A is a cathode-ray radar display tube; the approved datasheet specifies its focusing/deflection system, phosphor, afterglow, capacitances, and operating ratings.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
IO
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.

CRT operating ratings and direct interelectrode capacitances are published in the approved datasheet.

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

196X Cintel

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Heater Voltage

    6.3 V

    Nominal published value

  • Heater Current

    600 mA

    Nominal published value

  • Anode

    6 pF

    Published direct interelectrode capacitance

  • Cathode to all other electrodes

    8 pF

    Published direct interelectrode capacitance

Construction

  • Focusing Method

    Magnetic

    Published focusing method

  • Deflecting Method

    Magnetic

    Published deflection method