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7ABP7A

Seven-inch radar-display CRT with electrostatic focusing, magnetic deflection, and a P7 blue-white/yellow long-persistence screen for persistent echo presentation.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: DUODECAL6
Base pins: -
Nominal heater: 6.3 V / 600 mA

Description

Sylvania seven-inch CRT with electrostatic focus, magnetic deflection, and P7 blue-white/yellow, long persistence. Published electrical ratings, capacitances, and operating conditions were extracted from the supplied datasheet.

Socket description

Small-shell Duodecal 6-contact CRT base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: DUODECAL6
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: 11000 V

Published Sylvania CRT voltage ratings, capacitances, focusing/deflection, and typical operating conditions extracted.

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

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

Heater Voltage
6.3 V
Heater Current
600 mA
FocusingMethod
Electrostatic
DeflectionMethod
Magnetic
Deflection Angle
39 degree
Phosphor
P7 blue-white/yellow, long persistence
MinimumUsefulScreen
6 in
Cathode To All Capacitance
5 pF
Grid1 To All Capacitance
6 pF

Other

Grid1CircuitResistanceMaximum
1.5 Mohm
AnodeVoltageMaximum
11000 V
FocusElectrodeVoltageMinimum
-550 V
FocusElectrodeVoltageMaximum
1100 V
Grid2VoltageMaximum
770 V
Grid1NegativeBiasMagnitudeMaximum
200 V
HeaterCathodeVoltageMaximum
200 V
Anode Voltage
7000 V
FocusElectrodeVoltage
0 to 250 V
Grid2 Voltage
300 V
Grid1VoltageForCutoff
-28 to -72 V