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CL40

Mercury-argon linear light source with output proportional to anode current for recording, marking, and stroboscopic applications.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: InternationalOctal
Socket code: IO
Base pins: 8
Nominal heater: 6.3 V / 1.2 A

Description

Mercury-argon linear light source whose light output is proportional to anode current, for recording, marking and stroboscopic applications.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: InternationalOctal
Socket code: IO
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 1.2 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

InternationalOctal - 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: 600 V
Max cathode current: 100 mA

Promoted fields were populated only where the Ferranti sheet maps cleanly to the locked schema; additional ratings and operating values are retained in TUBE_SECTION_PARAMETER.

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

Trigger supply voltage minimum
350 V
Modulation frequency maximum
20 kHz
Cathode current maximum
100 mA
Anode and trigger supply voltage
400 V
Mean anode current
50 mA
Current modulation
50 %

Characteristics

Cathode current minimum
5 mA
MaintainGlow
Tube voltage drop
30 V
Approximate