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Specialized - Cathode Ray ·CathodeRay

30D5

Nine-inch long-afterglow cathode-ray tube designed for marine radar plan-position-indicator display. Its persistent screen retains radar echoes between sweeps, supporting navigation and target presentation.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
IO
Base pins
-
Nominal heater
4 V / 750 mA

Description

Long-afterglow 9-inch cathode-ray tube for marine radar PPI display.

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
4 V
Nominal heater current
750 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.

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 Mazda

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Maximum first-anode voltage

    1700 V

  • Maximum second-anode voltage

    1700 V

  • Maximum third-anode voltage

    9000 V