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High Tension Power Supply
High Tension Power Supply (Product Code: SLE/PHY/128) is a regulated laboratory power supply used to provide the high-tension voltages needed for thermionic experiments, such as a double fine beam tube, in college and senior school physics laboratories. It gives two independent, continuously adjustable outputs of 0-35V and 0-350V at 100mA maximum, plus two 6.3V AC cathode heater outputs, all fully isolated from earth. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| HT outputs | Two independent outputs, 0-35V and 0-350V, continuously adjustable and fully regulated |
| Maximum current | 100mA |
| Heater outputs | Two auxiliary outputs, 6.3V a.c. 1A, for cathode heaters, protected by resettable fuse |
| Display | Bright 12.5 mm green LED display indicating HT output |
| Output sockets | Shrouded sockets suitable for standard 4 mm plugs or shrouded plugs |
| Isolation | All outputs fully isolated from earth; independent earth terminal provided |
| Input | 220V-240V, 50/60 Hz (mains supply stated as 230V ±5%, 50Hz) |
| Protection | Fuse 1A (L); primary protected by slow-blow fuse and thermal trips |
| Dimensions | 208 x 155 x 115 mm (W x H x D); height including handle 187 mm |
| Applications | Thermionic experiments such as the double fine beam tube; experiments needing a high tension supply, such as ionization current |
| Product code | SLE/PHY/128 |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Is the High Tension Power Supply Used For?
Thermionic tubes need two things at once: a low heater voltage to warm the cathode so it emits electrons, and a high anode voltage to accelerate those electrons into a visible beam. The High Tension Power Supply provides both from one unit, with its 6.3V AC heater outputs and adjustable 0-350V HT output, which is why it suits fine beam tube work such as the specific charge of the electron experiment.
It also serves other experiments that need a high tension supply, including ionization current studies. Always switch off and turn the voltage controls to zero before changing connections, use shrouded 4 mm leads, and connect the independent earth terminal where the experiment requires it. The voltages involved are hazardous, so the unit should be used under a teacher's supervision.
What to Specify When Ordering
- Mains supply — the unit is specified for 220V-240V, 50/60 Hz input; tell us your local mains.
- Tube and holder — which thermionic tube and holder you will run from it, so we can check the combination.
- Leads — whether shrouded 4 mm leads should be included in the quotation.
Supplier
ScienceLab, the trading name of Jain Scientific Equipments Private Limited in Ambala, Haryana, supplies this High Tension Power Supply as a sourced instrument for electron-physics teaching. We can quote it together with the tubes, holders, coils and leads that make up a working thermionic set-up, which saves institutions from coordinating several vendors. Read about the company on our company profile.
Related Physics Lab Equipment
Items used alongside the High Tension Power Supply in electron-beam experiments:
- Teltron Dual Beam Tube D — electron tube for beam experiments; confirm its voltage needs with us.
- Teltron Helmholtz Pair of Coils D — coil pair giving a uniform magnetic field to bend the electron beam.
- Teltron Tube Holder D — stand for D-series tubes and their Helmholtz coils.
- EHT Power Supply — extra-high-tension supply for experiments beyond the 350V range.
- Stackable Leads — 4 mm leads for connecting the outputs.
See more power supplies and electron-physics apparatus in Physics Lab Equipment.
Frequently Asked Questions
What outputs does the High Tension Power Supply provide?
The High Tension Power Supply has two independent, continuously adjustable and fully regulated outputs of 0-35V and 0-350V with 100mA maximum current, plus two auxiliary 6.3V AC, 1A cathode heater outputs protected by a resettable fuse.
Which experiments is the High Tension Power Supply designed for?
The High Tension Power Supply is designed specifically for thermionic experiments such as the double fine beam tube. It can also be used for other experiments that require a high tension supply, for example ionization current measurements.
Are the outputs of the High Tension Power Supply isolated from earth?
Yes. All outputs of the High Tension Power Supply are fully isolated from earth, and an independent earth terminal is provided. The shrouded output sockets accept standard 4 mm plugs or shrouded plugs for safer connections.
What mains supply does the High Tension Power Supply need?
The High Tension Power Supply takes a 220V-240V, 50/60 Hz input, with the mains supply stated as 230V ±5%, 50Hz. It has a 1A (L) fuse, and its primary is protected by a slow-blow fuse and thermal trips.
Who supplies the High Tension Power Supply?
The High Tension Power Supply is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, Haryana, India. The company sources it for colleges, schools and institutions in India and international markets and can quote matching tubes and leads.
Is a calibration certificate available for the High Tension Power Supply?
A calibration document is not listed with the High Tension Power Supply. If your laboratory needs one, mention it through our contact page before ordering and we will confirm what paperwork can accompany the unit.
Request a Quote
Send us your High Tension Power Supply requirement, including the tubes and leads you plan to use, through the contact page, or add everything to the enquiry cart for one quotation.
Last updated: 24 September 2026
