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Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Cathode Ray ·CathodeRay

A3115W

European rectangular monochrome television picture tube with electrostatic focusing, magnetic deflection, and an aluminized or metal-backed screen. Manufacturer documentation supports direct-view receiver service with wide-angle deflection and compact cabinet geometry.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
EIGHTAR7
Base pins
-
Nominal heater
-

Description

31 cm rectangular picture tube with 110° 2. Typical Operating Conditlons (T) deflection angle, electrostatic focusing, aluminized screen and tension band in- :ff @ gg ; B0 A cluding tube mount Ui 1 RY

Socket description

Eightar 7-contact CRT base family

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
EIGHTAR7
Base pins
-
Nominal heater voltage
-
Nominal heater current
-
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.

CRT section. Maximum ratings, operating conditions, capacitances, optical and mechanical values are preserved as parameters where published.

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

1976 ITT Picture Tubes

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • A31

    -15 W

  • Published value

    31 cm

  • aluminized screen and tension band in- :ff @ gg ; B

    0 mA

  • Ugz

    300 V

  • Ugs @

    0 to 400 V

  • Published value

    9395 a

  • 9395a U cutori @ (2)

    35 to 69 V

  • % 9 Ug3gsa max &

    18 kV

  • Ug3g

    5 a

  • Ug3g5a min & (2)

    12 kV

  • gy Kk Eg_&:gsa min

    16 k

  • Ug-‘l max

    1000 v

  • s [-Ugs) rax

    500 V

  • Egd min

    470 ohm

  • Ug2 max

    550 V

  • Ug? min

    200 V

  • 1. Generalities Ro2 min

    470 ohm

  • Electron Tetrode with Einzel- Uk max

    150 V

  • Lens yk_pllax

    220 V

  • Base ~ German Standard (=Ux) p max

    2 V

  • DIN 44431 Ruigl max

    1.5 MQ

  • (Short Design) Zw/g) max

    0.5 MQ

  • Deflection Method Magnetic Pim max i

    10 mW/cm

  • Deflection Angles Diagonal 110° Uk max1 @ @

    410 V

  • Horizontal 99° U _ gk max 2 @ @

    200 v

  • Vertical 80° U s ik max

    135 V

  • Neck Diameter

    28.6 mm

  • Neck Diameter 28,6 mm Rikmex @ (2)

    1 MQ

  • Face Shape Spherical Zijk max @

    0.1 MQ

Capacitance

  • LA 53 %% approx.) Cgl approx.

    6 pF

  • Screen ‘Phosphor P4 Alu- Ck approx.

    5 pF

  • minized - Cg3g

    5 a

  • minized - Cg3g5a/m approx. (2)

    650 pF

  • Fluorescence Colour White CgdgSa/m' max

    200 pF

  • Colour Temperature 12

    0 °K

  • Minimum Useful 257x

    195 mm

  • Dimensions Diagonal

    295 mm

  • Overall Length 2376 £

    6.4 mm

  • Weight

    2.7 kg

  • A31

    -15 W