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7BSP2

Seven-inch flat-face five-beam CRT with electrostatic focusing and deflection and linear post acceleration. The multi-beam construction supports simultaneous instrument traces with enhanced final-beam acceleration.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: PENTAQUINTAL25
Base pins: -
Nominal heater: 6.3 V / 2.8 A

Description

Seven-inch flat-face five-beam cathode-ray tube with electrostatic focus/deflection and linear post acceleration.

Socket description

Pentaquintal 25-contact CRT base family (JEDEC B25-139)

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: PENTAQUINTAL25
Base pins: -
Nominal heater voltage: 6.3 V
Nominal heater current: 2.8 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.

Published Du Mont ratings and characteristics promoted from the supplied source.

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 Du Mont

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

Heater Voltage
6.3 V
Heater Current
2.8 A
DeflectionMethod
Electrostatic
FocusingMethod
Electrostatic
BeamCount
5
MinimumUsefulScreenDiameter
6 in

Other

PostAcceleratorVoltageMaximum
8800 V
AcceleratorVoltageMaximum
4400 V