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Tube Tinker — Electron Tube Database
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Voltage Regulator ·VoltageRegulator

SR2A

Precision cold-cathode reference maintaining approximately 88 V with high stability and at least 30,000 hours specified service life.

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

Description

Precision voltage stabilizer and reference tube with molybdenum cathode, extremely long life, high stability and low tritium preionization.

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
88 V
Regulator minimum current
2 mA
Regulator maximum current
80 mA
Regulator starting voltage
120 V
Regulator maintaining voltage
88 V

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

1962 Cerberus

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Characteristics

  • Breakdown voltage

    100 to 135 V

  • Stabilized voltage

    86 to 90 V

    30mA

  • Service life minimum

    30000 h

Other

  • Preferred operating-current range

    20 to 40 mA