V R Tube Characteristics Manufacturer,Supplier and Exporter in India
Product Code : EL-COVT-1077
Jlab Export is a leading V R Tube Characteristics Manufacturer,and suppliers in India
V R Tube Characteristics (code EL-COVT-1077) is an apparatus for drawing the characteristics of a voltage regulator (VR) tube, the gas-filled valve that holds a nearly constant voltage across itself over a range of currents. It comes complete with a power supply, and the tube is mounted on a base. It is made by Jain Laboratory Instruments Pvt Ltd (JLab) at its works in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Experiment | To draw the characteristics of a VR (voltage regulator) tube |
| Supplied with | Power supply |
| Tube mounting | Tube mounted on a base |
| Tube type | Cold-cathode tube containing gas at low pressure, which ionizes at a predefined voltage |
| Quality check | Each apparatus is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 7–10 working days |
| Product code | EL-COVT-1077 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the VR Tube Apparatus Used For?
A VR tube has a cold cathode and is filled with gas at low pressure instead of the high vacuum of an amplifying valve. The gas is chosen to ionize and conduct at a particular voltage, and once it conducts the voltage across the tube stays almost the same while the current through it changes — the property that made VR tubes widely used voltage stabilizers in valve-era power supplies. In the practical, the supply voltage is raised through a series resistance: no current flows until the tube strikes, the voltage across it then falls to its steady running value, and further increases in supply voltage raise the current while the tube voltage hardly moves. Plotting tube voltage against current shows this flat regulating region clearly.
The experiment suits B.Sc. physics and electronics practicals on gas discharge and voltage regulation, and makes a direct comparison with the Zener diode, its solid-state equivalent. Always keep a series resistance in circuit to limit the current, and switch off before changing connections.
Frequently Asked Questions
What does this apparatus show?
The voltage–current characteristic of a VR tube: the striking point and the region where the tube voltage stays nearly constant as the current changes.
Is a power supply included?
Yes. The listing describes it as complete with a power supply, with the tube mounted on a base. The tube type, supply range and meters are not stated, so ask JLab to confirm them in the quotation.
How does a VR tube compare with a Zener diode?
Both hold a nearly constant voltage over a range of currents. The VR tube does it by gas ionization; the Zener diode does it by reverse breakdown in a semiconductor junction. JLab lists a separate Zener diode voltage-stabilization kit for that comparison.
Who manufactures it?
Jain Laboratory Instruments Pvt Ltd, trading as JLab, at its works in Ambala, Haryana, India.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, a physics and electronics lab apparatus manufacturer in India, incorporated in 2017 and based on Hargolal Road, Ambala, Haryana. The VR tube apparatus is made in its own works rather than bought from a trader, so colleges, dealers and importers buy direct, each unit is visually inspected before dispatch, and repeat orders and spare tubes come from the manufacturer. JLab exports worldwide and ships to buyers in every region — for example Lesotho in Southern Africa, Japan in East Asia, Costa Rica in Central America and the Caribbean, Romania in Eastern Europe and Cambodia in Southeast Asia.
Related Apparatus
- Voltage Stabilization Characteristics of Zener Diode — the semiconductor way of holding an output voltage steady.
- Thyratron Valve Characteristics Apparatus — another gas-filled valve, with grid control.
- Ionization Potential of Mercury — measures the voltage at which gas ionization begins.
See the Characteristics of Vacuum Tubes range or all Scientific Instrument listings.
Request a Quote
Quotes come direct from the manufacturer. Use Add To Cart on this page, or send the quantity (minimum 10 units), any spare tubes, and your delivery location through the contact page.
Last updated: 9 October 2026
