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Specialized - Photo Tube ·LightSource

ED25

Gas-discharge stroboscopic light source for controlled high-intensity flash and motion-analysis applications.

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

Description

The Ferranti ED25 is a gas-discharge stroboscopic light source intended for controlled high-intensity flashes.

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

LightSource

X-ray radiationInterelectrode capacitances
Max plate voltage
500 V

Arc-discharge stroboscopic light-source section; representative section where repeated.

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 Ferranti

Published operating points and test conditions from this source.

SECTION 1

LightSource

Other

  • Maximum Static Anode Voltage

    500 V

  • Maximum Working Anode Voltage

    500 V

  • Maximum Discharge Capacitor

    8 uF

  • Maximum Flash Repetition Rate

    150 Hz

  • Trigger Voltage

    3 kV

    PeakPulse

  • DC Supply Voltage

    450 V

  • Charging Resistor

    8000 ohm

  • Discharge Capacitor

    0.5 uF

    FlashRate=150Hz