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83A1

Miniature precision cold-cathode reference tube providing a highly stable approximately 83.75 V maintaining voltage for instrumentation and reference circuits.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: Miniature 7 pin
Socket code: B7G
Base pins: 7
Nominal heater: -

Description

The Mullard 83A1 is a miniature cold-cathode reference tube intended to provide a highly stable reference voltage.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: Miniature 7 pin
Socket code: B7G
Base pins: 7
Nominal heater voltage: -
Nominal heater current: -
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Miniature 7 pin - 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 minimum current: 3.5 mA
Regulator maximum current: 6 mA
Regulator starting voltage: 130 V
Regulator maintaining voltage: 83.75 V
Regulator dynamic impedance: 350 Ω

Gas-discharge device.

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 Mullard

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Other

Minimum DC Starting Voltage
130 V
Maximum Starting Current
10 mA
Maximum Cathode Current
6 mA
Minimum Cathode Current
3.5 mA
Preferred Cathode Current
4.5 mA
Maximum Negative Anode Voltage
50 V

Characteristics

Operating Voltage Minimum
83 V
AtPreferredCurrent
Operating Voltage Maximum
84.5 V
AtPreferredCurrent
Maximum Incremental Resistance
350 ohm
Minimum Incremental Resistance
110 ohm
Typical RMS Noise Voltage
100 uV
30Hz-10kHz

Data set 02

1963 Philips Electron Tubes Handbook V2

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Characteristic

Maintaining voltage at 4.5 mA
82.6 to 84.1 V
Preferred operating current 4.5mA

Data set 03

1971 Mullard Gas Filled Tubes

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Other

Ignition/striking voltage
130 V
Minimum cathode current
3.5 mA
Maximum cathode current
6 mA

Characteristic

Incremental resistance
350 ohm

Data set 04

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Characteristics

Maintaining voltage range
82.6 to 84.1 V
Published datasheet value
Voltage jump
- to 1 mV
Published datasheet value
Noise voltage
- to 100 µV
30–10000 Hz

Other

Preferred operating current
4.5 mA
Published datasheet value
Maximum initial current
- to 10 mA
Published datasheet value
Maximum reverse voltage
- to 50 V
Published datasheet value