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9RP33

Nine-inch Mullard radar cathode-ray tube with an orange long-persistence screen. Its phosphor retains echoes between sweeps, making it suitable for radar indicator presentation.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 300 mA

Description

The Mullard 9RP33 is a 9-inch radar CRT with orange long-persistence screen

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: 300 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 electron-gun/display 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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

Heater Voltage
6.3 V
Heater Current
300 mA
Focusing Method
Electrostatic text
Deflection Method
Magnetic text
Fluorescence
Orange text
Persistence
Long text
Anode-Coating Capacitance
700 pF

Other

Anode Voltage Maximum
14000 V
Anode Voltage Minimum
8000 V
Typical Anode Voltage
12000 V
Grid 2 Voltage
100 V
Grid 4 Voltage Range
-200 to +200 V
Grid 1 Cutoff Voltage Range
-30 to -70 V