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874

Gas-filled cold-cathode voltage regulator for shunt stabilization of DC supplies over approximately 10–50 mA.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: -

Description

Cold-cathode gas-discharge glow regulator tube for maintaining substantially constant voltage over a specified operating-current range.

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

Voltage Regulator

X-ray radiationInterelectrode capacitances

Regulator voltage: 90 V
Regulator minimum current: 10 mA
Regulator maximum current: 50 mA
Regulator starting voltage: 125 V
Regulator maintaining voltage: 153 V

Source-derived section; identical dual beam-power sections compressed where applicable.

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

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Other

The
0 V
The 874 is a voltage regulator tube designed to maintain 0’0
STARTING SUPPLY VOLTAGE (D. C)
125 V
STARTING SUPPLY VOLTAGE (D. C).............. 125 min. Volts
OPERATING VOLTAGE (D. C.).vvnnunnnnnenns
90 V
OPERATING VOLTAGE (D. C.).vvnnunnnnnenns 90 Volts
OPERATING CURRENT (D. C.)..cvviuinennnnnnnnn
50 mA
OPERATING CURRENT (D. C.)..cvviuinennnnnnnnn. 10 to 50 Milliamperes
ConTiNUOUS CURRENT (D. C).vnennnnnnnnnn.,
50 mA
ConTiNUOUS CURRENT (D. C).vnennnnnnnnnn., 50 max. Milliamperes
MAXIMUM OVERALL LENGTH....vvvvvveerenrnnnns
554 in
MAXIMUM OVERALL LENGTH....vvvvvveerenrnnnns 554 Inches
MAXIMUM DIAMETER
234 in
MAXIMUM DIAMETER 0ivivunnninnnnnennannnsnns 234e Inches
current to
50 mA
current to 50 milliamperes when no load current is being drawn from the rectifier.
VOLTAGE RANGE ............. veesen
60 V
VOLTAGE RANGE ............. veesen.. 40to 60 40 to 60 Volts
OPERATING CURRENT ........ ceerasans
2 A
OPERATING CURRENT ........ ceerasans 1.7 2.0% Amperes
AMBIENT TEMPERATURE (Fahrenheit)
150 deg
AMBIENT TEMPERATURE (Fahrenheit).... 150 150 Degrees
MAxIMUM OVERALL LENGTH...cveeeenee
8 in
MAxIMUM OVERALL LENGTH...cveeeenee 8 8 Inches
MAXIMUM DIAMETER .......coovevnenes
2 in
MAXIMUM DIAMETER .......coovevnenes 2Yg 2Yp Inches
to the primary (or load) over a range of line voltage variation of
20 V
to the primary (or load) over a range of line voltage variation of 20 volts. The
average line voltage minus
50 V
average line voltage minus 50 volts. The primary current of the transformer
should be
886 A
should be 1.7 amperes for the 876 and 2.05 amperes for the 886. If less than this

Data set 02

1950 General Electric Transmitting Types

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Characteristic

Regulator Voltage
153 V
Regulator Maintaining Voltage
153 V
Typical Anode Voltage Drop
153 V

Other

Regulator Maximum Current
50 mA