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Specialized - Cathode Ray ·CathodeRay

8SP7

Special-purpose cathode-ray display tube documented for type 8SP7, with manufacturer-defined screen, focusing, and deflection characteristics for technical visual display.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
25
Nominal heater
6.3 V / 800 mA

Description

The 8SP7 is an 8-inch dual-beam cathode-ray tube with electrostatic focus and deflection for sonar and oscillographic applications.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
25
Nominal heater voltage
6.3 V
Nominal heater current
800 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.

Dual-beam cathode-ray tube; ratings are stated per gun and preserved 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

  • PostAcceleratorVoltageMax

    6000 V

    PerGun

  • AnodeVoltageMax

    3000 V

    PerGun

  • AnodeInputMax

    6 W

    PerGun

  • PostAcceleratorVoltageTypical

    6000 V

    PerGun

  • AnodeVoltageTypical

    3000 V

    PerGun

  • Heater Voltage v v 4 o 4 o o o o o s 6

    3 V

    GENERAL

  • D1 to All Other Electrodes

    11.5 pF

    Direct Interelectrode Capacitances Maximum

  • D2 to All Other Electrodes +v v v v 4 o +

    11.5 pF

    Direct Interelectrode Capacitances Maximum

  • D3 to All Cther Electrodes o v +v o 2 o o

    11.5 pF

    Direct Interelectrode Capacitances Maximum

  • D4 to All Other ElectrodeS v v v o o o o

    11.5 pF

    Direct Interelectrode Capacitances Maximum

  • Post Accelerator Contact Aligns With Trace of D1-D2 +

    10 deg

    MECHANICAL

  • D1-D2 Trace Aligns with Pin No 4 and Tube Axis +

    10 deg

    MECHANICAL

  • Angle Between D3-D4 and D1-D2 Traces 90 +

    1 deg

    MECHANICAL

  • Anode Input i 4 v 4 4 e

    4 W

    MAXIMUM RATINGS

  • Post Accelerator Voltage 6

    0 V

    MAXIMUM RATINGS

  • Anode VOltade v +v 2 + o s o a0 se 6 o 3

    0 V

    MAXIMUM RATINGS

  • Focusing-Electrode Voltage

    575 to 875 V

    MAXIMUM RATINGS

  • Dl and D2 GUN B2 4 5 o o o +

    80 to 110 V

    MAXIMUM RATINGS

  • D3 and P4 2 4 5 2 o o s 2 a o 2 o

    62 to 98 V

    MAXIMUM RATINGS

  • Focusing-Electrode Current + 4 +

    15 to 10 uA

    MAXIMUM RATINGS