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Tuning Indicator ·TuningIndicator

3180

Neon gas-discharge visual indicator for receiver tuning or electrical level indication, using controlled glow rather than a conventional fluorescent electron-ray target.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B4
Base pins
-
Nominal heater
-

Description

3180: Cossor neon tuning indicator. The complete Cossor sheet was read for construction, technical data, operating recommendations, and application notes.

Socket description

European 4-pin base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B4
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

Tuning Indicator

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Published ratings/characteristics promoted from the approved datasheet.

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

1936 Cossor Valve Manual

Published operating points and test conditions from this source.

SECTION 1

Tuning Indicator

Characteristics

  • Gas filling

    Neon

  • Electrode count

    3

  • Display indication

    Glow height and intensity indicate tuning

  • Control characteristic

    Variable-mu