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7JP4

Seven-inch direct-view television picture tube with electrostatic focusing and electrostatic deflection and a P4 white screen. Manufacturer documentation gives anode capability to approximately 6 kV.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: B12D
Base pins: 12
Nominal heater: 6.3 V / 600 mA

Description

A 7-inch direct-view electrostatic-focus and electrostatic-deflection television picture tube with P4 white phosphor.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B12D
Base pins: 12
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: 6000 V
Rectifier max heater-cathode voltage: 125 V

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
600 mA
Nominal
DeflectionFactorVertical
216 V/in
ElectrostaticDeflection
DeflectionFactorHorizontal
177 V/in
ElectrostaticDeflection

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Capacitance

CathodeToOtherElectrodesCapacitance
9.5 pF
Approximate

Construction

DeflectionMethod
Electrostatic
FocusingMethod
Electrostatic

Data set 03

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

Heater voltage
6.3 V
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Over-all length. . ...... .. ... ... ... . . . . . . ... ... ... .. .. 1415 =
34 in
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Greatest diameter of bulb. .. ... .. .. ... ... .. ... ... ... .. ... ... 7%=
14 in
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Minimum useful screen diameter
6 in
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D1-D2 Trace aligns with Pin No. 5 and tube axis =
10 deg
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be adequate to limit the anode No. 2 input power to
6 W
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Anode No. 2 voltage. . .. .. ... . ... .. ... 3000
6000 V
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Anode No. 1 voltage (for focus)#. . .. ... ... .. . .. .. ... .. .. ... ... 810 to 1200 1620 to
2400 V
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Grid No. 1 voltage##. ... .. ... ... . ... . —36 to —84 —72 to —
168 V
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Dland D26. ... .. .. 31 to
41 V
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D3and D4. .. .. 25 to
34 V
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For anode No. 2 voltage between 3000 and
6000 V
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Characteristic

*With
0 V
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*With
6000 V
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