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3HP7

Compact P7 cathode-ray display tube with magnetic focusing and magnetic deflection, approximately 55-degree deflection, a 5.5 kV maximum anode rating, and long-persistence display characteristics.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 600 mA

Description

Three-inch high-vacuum cathode-ray tube with magnetic focusing and magnetic deflection, 55-degree maximum deflection angle, and P7 phosphor.

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: 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

Max plate voltage: 5500 V

Published ratings and characteristics promoted where clearly stated; remaining published values retained as section 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

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

Heater or filament voltage
6.3 V
Published nominal value
Heater or filament current
600 mA
Published nominal value
Maximum solid deflection angle
55 deg
Published
Phosphor
P7
Published
Focusing method
Magnetic
Published
Deflection method
Magnetic
Published

Other

Anode maximum voltage
5500 V
Absolute maximum
Grid No.2 maximum voltage
220 V
Published