Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Voltage Regulator
Characteristic
Operating Voltage
90 V
Voltage Regulator ·VoltageRegulator
VR90
Cold-cathode 90 V glow regulator also suitable for relaxation-oscillator and spark-over protection applications.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 4AJ
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- -
Description
VR90 is a VoltageRegulator device. Cold-cathode glow-discharge voltage regulator; also suitable for relaxation-oscillator and spark-over protection service.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 4AJ
- Socket code
- IO
- Base pins
- 8
- 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.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN2K | A | K — Cathode | Unverified EIA Base Connections, printed page 127, 4AJ |
| PIN5P | A | P — 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
- 90 V
- Regulator minimum current
- 10 mA
- Regulator maximum current
- 30 mA
- Regulator starting voltage
- 125 V
- Regulator maintaining voltage
- 90 V
Glow-discharge voltage-regulator section.
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 02
195X General Electric Essential Characteristics
Published operating points and test conditions from this source.
SECTION 1
Voltage Regulator
Characteristic
Operating voltage
90 V
Ionization voltage
110 V
Regulation over operating-current range
8 V
5to40mA
Other
Minimum DC operating current
5 mA
Maximum DC operating current
40 mA
Minimum anode supply voltage
125 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
90 V
Maximum regulation
8 V
10to30mA
Other
Minimum operating current
10 mA
Maximum operating current
30 mA
Minimum starting-voltage supply
125 V
Data set 04
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
90 V
DC operating current minimum
10 to - mA
DC operating current maximum
- to 30 mA
Characteristic
DC starting voltage
125 V
Approximate
Voltage regulation
- to 5 V
Ia=10-30mA