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Specialized - Photo Tube ·PhotoemissiveDetector

3510

High-vacuum potassium-cathode photoelectric cell for direct light detection and measurement. Its photocathode generates current in response to incident radiation without internal electron multiplication.

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

Description

High-vacuum potassium-cathode photoelectric cell.

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
-
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

PhotoemissiveDetector

X-ray radiationInterelectrode capacitances
Max plate voltage
500 V
Max cathode current
0.003 mA

Published Mullard/Ferranti ratings and characteristics promoted where applicable; additional 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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

PhotoemissiveDetector

Construction

  • Photocathode / fill

    High-vacuum potassium cathode

Other

  • Anode voltage maximum

    500 V

  • Normal anode voltage

    100 V

  • Anode current maximum

    3 uA

  • Light flux maximum

    0.1 lm

Characteristics

  • Sensitivity

    3 uA/lm

Capacitance

  • Anode-cathode capacitance

    3 pF

Application

  • Application

    Photoelectric light detection

Data set 02

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

PhotoemissiveDetector

Characteristic

  • Anode voltage . . . . Va

    100 v

    Anode voltage . . . . Va = 100 v

  • Sensitivity . . . . . . N

    3 pA

    Sensitivity . . . . . . N = 3 pA/lm

  • tage of high sensitivity to light of a wavelength below

    6500 A

    tage of high sensitivity to light of a wavelength below 6500 A. Accordingly the

  • Since the sensitivity of

    3 pA

    Since the sensitivity of 3 pA/Im quoted above is measured with illumination

  • sensitivity to daylight is

    6 pA

    sensitivity to daylight is 6 pA/lm. The curve overleal, showing response in

Capacitance

  • Anode to cath. capacity Cak

    3 pF

    Anode to cath. capacity Cak =3 pF

Other

  • Maximum anode voltage Vamax

    500 v

    Maximum anode voltage Vamax = 500 v

  • Admissible temperature . tmax

    50 °c

    Admissible temperature . tmax = 50 °c

  • permissible maximum anode current is

    3 pA

    permissible maximum anode current is 3 pA, and the cell must never be