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Voltage Regulator ·VoltageRegulator

VR75

Cold-cathode 75 V glow regulator also usable in relaxation oscillators and spark-over protection circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
4AJ
Socket code
-
Base pins
4
Nominal heater
-

Description

VR75 is a VoltageRegulator device. Cold-cathode glow-discharge voltage regulator; also suitable for relaxation-oscillator and spark-over protection service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
4AJ
Socket code
-
Base pins
4
Nominal heater voltage
-
Nominal heater current
-
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

4AJ - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN2KAK — CathodeUnverified

EIA Base Connections, printed page 127, 4AJ

PIN5PAP — Plate (Anode)Unverified

EIA Base Connections, printed page 127, 4AJ

Section ratings

1 physical section, each with unique specifications.

Section 1

Voltage Regulator

X-ray radiationInterelectrode capacitances
Regulator voltage
75 V
Regulator minimum current
5 mA
Regulator maximum current
40 mA
Regulator starting voltage
100 V
Regulator maintaining voltage
75 V
Regulator dynamic impedance
100 Ω

Published glow-regulator values promoted from the source sheet.

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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Characteristic

  • Nominal maintaining voltage

    75 V

  • Voltage variation over current range

    4 V

Other

  • Current range

    5 to 40 mA

  • Nominal current

    20 mA

  • Radioactive starting aid

    present

    No harmful radiation stated by source

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Characteristic

  • Operating voltage

    75 V

  • Ionization voltage

    100 V

  • Regulation over operating-current range

    5 V

    5to40mA

Other

  • Minimum DC operating current

    5 mA

  • Maximum DC operating current

    40 mA

  • Minimum anode supply voltage

    105 V

Data set 03

195X Raytheon Special Purpose Tubes

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Characteristic

  • Operating voltage

    75 V

  • Maximum regulation

    5 V

    5to40mA

Other

  • Minimum operating current

    5 mA

  • Maximum operating current

    40 mA

  • Minimum starting-voltage supply

    105 V

Data set 04

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Characteristic

  • Regulation

    3 V

    5 to 30 mA

Data set 05

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Other

  • DC operating voltage

    75 V

  • DC operating current minimum

    5 to - mA

  • DC operating current maximum

    - to 40 mA

Characteristic

  • DC starting voltage

    100 V

    Approximate

  • Voltage regulation

    - to 3 V

    Ia=5-40mA