Y1938

Low-voltage seven-segment vacuum fluorescent display using phosphor-coated segments excited by electrons from a directly heated cathode for bright alphanumeric readout.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 1.5 V / 42 mA

Description

The Y-1938 is a low voltage seven bar segment vacuum cathodoluminescent readout tube which provides bright, shamp display of alphanumeric symbols at low drive and power levels. Symbols are displayed in type Y-1938 by excitation of phosphor-screened segments, which are energized by electrons emitted by a directly heated common cathode.

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: 1.5 V
Nominal heater current: 42 mA
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

Nixie

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Vacuum fluorescent/readout display represented as SectionType Other; published electrical/optical data preserved in 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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Nixie

Other

AnodeExcitationVoltageMaximum
55 V
AnodeExcitationVoltageTypical
25 V
MaximumTotalAnodePowerDissipation
100 mW
At 25 V
LOW POWER - Typical operation for high brightness is 25 volts for anode and 1 5 Vac or Vdc at
42 mA
LOW POWER - Typical operation for high brightness is 25 volts for anode and 1.5
Fllament Voltage o e e e
1.5 V
TYPICAL SPECIFICATIONS
Filament CUmmeNt i i i e e
42 mA
TYPICAL SPECIFICATIONS
Filament Heating PoWer ottt ittt et et e ettt e e e e
72 mW
TYPICAL SPECIFICATIONS
Anode Excitation Voltage (Max ) o i e e e e b
5 V
TYPICAL SPECIFICATIONS
Anode Excitation Voltage Typical) iiiin i e e e e e
25 V
TYPICAL SPECIFICATIONS
Maximum Total Anode Power Dissipation at 25 Volts i e
100 mW
TYPICAL SPECIFICATIONS
Light Output (at
25 V
TYPICAL SPECIFICATIONS

Characteristic

AnodeCurrentPerSegment
550 uA
At 25 V