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Specialized - Photo Tube ·PhotoconductiveDetector

83451

Cadmium-sulfide photoconductive cell designed for visible-light sensing and industrial relay or control applications.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
B12A
Base pins
-
Nominal heater
-

Description

Cadmium-sulfide photoconductive cell for industrial light-sensing and relay/control applications.

Socket description

Duodecal 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B12A
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

PhotoconductiveDetector

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Published Sylvania ratings and characteristics promoted where applicable; additional device-specific electrical values retained as 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

PhotoconductiveDetector

Construction

  • Sensitive material

    Cadmium sulfide

Characteristics

  • Spectral response peak approximate

    6100 angstrom

  • Cell resistance at 2 foot-candles

    750 ohm

  • Dark resistance minimum

    75000 ohm

Other

  • Breakdown voltage maximum

    400 V

  • Permissible dissipation at 25 C

    300 mW

  • Permissible dissipation at 70 C

    25 mW

  • Ambient temperature minimum

    -40 C

  • Ambient temperature maximum

    70 C

Condition

  • Resistance measurement illumination

    2 foot-candle

  • Dark-resistance measurement delay

    10 s

Application

  • Application

    Industrial light sensing / relay control