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Specialized - Cathode Ray ·CathodeRay

7UP7A

High-resolution-gun version of the seven-inch P7 long-persistence CRT with magnetic focusing and deflection. Its improved electron gun supports sharper persistent radar and instrument traces.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 600 mA

Description

High-resolution-gun version of the seven-inch P7 long-persistence magnetic-focus/magnetic-deflection CRT.

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 screen voltage
770 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

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Maximum Grid No. 2/screen voltage

    770 V

    Published maximum Grid No. 2 voltage

  • Anode voltagel

    200 V

    Anode voltagel .................. 13'200 Volts dc

  • Grid No. 2 Voltage

    770 V

    Grid No. 2 Voltage ................ 770 Volts dc

  • Heater Negative with Respect to cathode

    200 V

    Heater Negative with Respect to cathode ..... 200 Volts

  • Heater positive with Respect to cathode .,

    200 V

    Heater positive with Respect to cathode .,... 200 Volts

  • Grid No. 1 Circuit Resistance

    1.5 Mohm

    Grid No. 1 Circuit Resistance 1.5 Megohms Max.

Characteristic

  • Heater current

    600 mA

    Published heater current

  • Heater voltage

    6.3 V

    Heater voltage ............ 6.3 Volts

Data set 02

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • ittt et e ettt ettt eans

    6.3 V

    Published datasheet line; semantic text-layer recovery

  • Deflection Angle, approximate . . . ... ... . . L

    53 deg

    Published datasheet line; semantic text-layer recovery

  • Minimum Useful Screen Diameter. .. ...... ..ottt ittt iiiiin e enraneriaensasen

    6 in

    Published datasheet line; semantic text-layer recovery

  • Anode Contact Aligns with Pin No. 5=

    10 deg

    Published datasheet line; semantic text-layer recovery

  • Anode Voltage . .. ... it e et

    7000 V

    Published datasheet line; semantic text-layer recovery

  • Grid-No. 2 Voltage . . ...ttt i e i e e e et e e e

    250 V

    Published datasheet line; semantic text-layer recovery

  • Grid-No. 1 Voltagem . ..o i ittt it ittt e teae s nneenernnennas —~25to —

    70 V

    Published datasheet line; semantic text-layer recovery

  • Focusing-Coil Current A, approximate . . . ... ...ttt ittt

    111 mA

    Published datasheet line; semantic text-layer recovery

  • than

    5000 V

    Published datasheet line; semantic text-layer recovery