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7CP7

Seven-inch electrostatic-focus, magnetic-deflection CRT with a high-resolution gun and long-persistence P7 screen, intended for oscillographic applications where displayed traces must remain visible after excitation.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

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

Description

7-inch electrostatic-focus and magnetic-deflection cathode-ray tube for oscillographic applications requiring long persistence, with a high-resolution gun.

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

No fixed ratings are recorded for this section.

Promoted fields mapped by printed headings; additional data retained in 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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

Heater Voltage . . . e e e e e e
6.3 V
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Heater Current . . . . . . . . . . . s . . 0.6+
109 A
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Deflection Angle, approximate. . . . . ¢« « ¢ = o o« « « » »
57 deg
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Over-all Length . o « & o « « « o o o o o « o 13-7/16+ 3/8
1 in
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Greatest Bulb Ddameter . . . . &+ ¢ ¢ + o o @ o o » o 7+ 1/
8 in
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Minimum Useful Screen Diameter . « o . ¢« o o « o ¢ o o 6—1/
2 in
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Anode Contact Aligns with Pin No. 2 +
10 deg
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Anode Voltage + . ¢« . & o o o 5 o o o =« = 2 o s » + o« «
7000 V
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Focusing-Electrode Voltage for Focus . . .« » o 955 to
1780 V
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Grid—NOc 2 VOItage e @ © ©o © ©o e o e Ll ° e °o © o © = s ®
250 V
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Grid-No, 1 Voltage # . . . . « . o « & s o« o =22,5 to =
-67.5 V
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than 4,
0 V
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