QES Ltd

+44(0)1438 749849

Unit 4, Chells Enterprise Village, Chells Way, Stevenage, Hertfordshire, SG2 0LQ



QES Limited was founded in 1990 as a high quality repair and engineering services business specialising in electronic power conversion...

Contact Us Visit Our Website

About Us

QES Limited was founded in 1990 as a high quality repair and engineering services business specialising in electronic power conversion equipment (Power Supplies). Twenty one years later these Quality Electronic Services are well known across a wide range of customers and markets world wide.

ALL of our services are provided under our Quality and Environmental management systems which are certified to ISO9001/14001.

QES is THE company for anything connected with power supplies. If you need Custom Designed product, off the shelf repacements for obsolete units, or just a power supply for a new application then get in contact because we are the right people for you.

Repairs are what we are best known for. We repair any power supply made by anyone anywhere in the world. We see product from all over Europe for repair in our UK workshop. Our reputation for doing a quality job at the right price is unequaled.

Take a look at our web site for more information or give us a call to discuss your requirements or get a price.

How to find us

Page Statistics


View All Products

Featured Products

QES Ltd have 26 products listed - these are some of their top products.

2011 Catalogue

2011 Catalogue

The QES 2011 catalogue provides details of all of the Power Electronics services offered by QES toge...

AC/DC Power Supplies

AC/DC Power Supplies

QES Specialises in providing repair and replacement services for all types of electronic Power Equip...

Added Value

Added Value

This is the process whereby we take a standard power block and by adding circuitry and /or mechanics...

Battery Chargers

Battery Chargers

QES provides a specialist repair service for all types of electronic battery chargers. From the simp...

Complete Product Design & Development

Complete Product Design & Development

We can dsign to your specification, or maybe one we generate in conjunction with you. We deal with ...

Custom Power Supplies

Custom Power Supplies

QES can design a power supply to fit your custom requirements whether these are for high quality spe...

DC / DC Converters

DC / DC Converters

DC/DC converters are just another form of the power conversion products that QES specialise. We off...

Electronic Repair Services

Electronic Repair Services

Although we specialise in Power Supplies we are very happy to deal with all types of electronic equi...

Industrial Power Supplies

Industrial Power Supplies

Our services encompass many different parts of the industrial electronics maketplace. We provide re...

Inverters

Inverters

Inverters, or DC to AC converters, are another form of power electronics that is part of the product...

Linear Power Supplies

Linear Power Supplies

QES repair and provide replacements for a wide range of linear power supplies including those previo...

Military Power Supplies

Military Power Supplies

QES has been involved with power supplies for the military and defence markets for the past 20 years...

Modified Standards

Modified Standards

This is a process where we change the existing unit to a high quality standard by means of modificat...

Obsolete Product Replacement

Obsolete Product Replacement

As part of our ‘complete power supplies services’ we are trying to help customers , and potential cu...

PCB Repair

PCB Repair

PCB repairs down to component level are carried out using the state of the art diagnostic, soldering...

Power Electronics Repair

Power Electronics Repair

QES Specialises in providing an electronics repair service for all types of power electronics. This ...

Power Supply Repair

Power Supply Repair

This is what QES is best known for. We repair and refurbish all types of power electronics equipment...

Product Design & Development

Product Design & Development

We provide a design service for customers that are looking for something special. That something may...

Product Innovation

Product Innovation

If you have product ideas but do not have the skills or resources to develop them then maybe you can...

Product Innovation

Product Innovation

Perhaps you have an idea for a new product but do not have the background skills to develop it, well...

Product Modification

Product Modification

As a product reseller or distributor you have a customer that wants something slightly different fro...

View All Products


View All News

Featured News

QES Ltd have 40 news listed - these are some of their latest news.

10VA 400Hz Sine Wave Generator

10VA 400Hz Sine Wave Generator

Some years ago we were asked if we were interested in designing a small fixed frequency sine wave ge...

A modified commercial off-the-shelf power supply.

A modified commercial off-the-shelf power supply.

This design project was the result of a customer with a problem. A standard constant voltage output ...

Improvement of reliability

A telecoms customer asked us to review a particular power supply it was using and suggest what might...

Replacement primary control PCB surface mount.

Replacement primary control PCB surface mount.

A single sided pcb containing around 70 component parts on a surface area of approximately 30 x 60 m...

New product for distribution

Various UK product distribution companies either commission or bring in product to the UK based on a...

Xenon Lamp Power Supply, XLS150.

Xenon Lamp Power Supply, XLS150.

The original power supply was obsolete and the company supporting the user base, in specialised prin...

A Military Naval Sheltered Environment Power Supply Unit.

A Military Naval Sheltered Environment Power Supply Unit.

This unit was designed to a full customer specification for use within a system now deployed on the ...

Manufacturing Fault

One of our customers, who is a large power supply manufacturer, discovered that a fault existed on o...

Obsolete Power Supplies – a maintenance dilemma!

Obsolete Power Supplies – a maintenance dilemma! In many cases the power supplies used within ind...

Modifying Standard Electronics Assemblies-Gives ‘Flexibility’ Edge

Modifying Standard Electronics Assemblies-Gives ‘Flexibility’ Edge

Modifying Standard Electronics Assemblies-Gives ‘Flexibility’ Edge QES Limited, based i...

Replacing Coutant MML Series power supplies

Replacing Coutant MML Series power supplies

Power Electronics –Replacing Coutant MML Series power supplies Remember the ML and MML series ...

Rectifier Repair Services at QES Ltd

Rectifier Repair Services at QES Ltd

Power Electronics –Rectifier Repair Services at QES Ltd Rectifiers, or Telecom Rectifiers are ...

Power Electronics – Products & Services; New ‘QES 2011’ Brochure

Power Electronics – Products & Services; New ‘QES 2011’ Brochure The new 2011 Produc...

Power Electronics – Products & Services; New ‘QES 2011’ Brochure

Power Electronics – Products & Services; New ‘QES 2011’ Brochure

Power Electronics – Products & Services; New ‘QES 2011’ Brochure The new 2011 Produc...

The importance of ‘quality’ power electronics repairs?

The importance of ‘quality’ power electronics repairs?

The importance of ‘quality’ power electronics repairs? QES Limited have always been kno...

Replacement Power Electronics in the Defence Market

Replacement Power Electronics in the Defence Market

Replacement Power Electronics in the Defence Market QES, the power electronics specialist, has ...

QES is Moving On

QES is Moving On

QES is Moving On In February 2011 QES will move the whole of its business operation to new premis...

Quality, low volume electronics manufacturing

Quality, low volume electronics manufacturing

Quality, low volume electronics manufacturing QES has been manufacturing quality electronic assem...

1st New Power Supply Design of 2011

1st New Power Supply Design of 2011

1st New Power Supply Design of 2011 QES, the power electronics specialist, has anounced that it...

New Power Supply Design Contract

New Power Supply Design Contract

New Power Supply Design Contract QES, the power electronics specialist, has anounced that it ha...

QUALITY IS UNQUESTIONED!!

QUALITY IS UNQUESTIONED!!

QUALITY IS UNQUESTIONED!! Management Systems ISO9001:2008 ISO14001:2004 In November both t...


Featured Jobs

QES Ltd have 0 jobs listed - these are some of their latest jobs.

There is nothing listed here for this company


View All Reviews

Latest Reviews

QES Ltd is rated1

Write your own review

submit review

There is nothing listed here for this company


Videos

There are no videos

There is nothing listed here for this company


(0 Videos )




Or view our website...