Front end unity power factor rectifiers and complete isolated output rectifiers now available from Preston with lowest parts count and simple control - for robust and reliable operation.

We are now selling fully working demonstration power converters up to 2.5kW AC/DC for power engineers to get to grips with H bridge converter circuits...

For powering the next generation of light weight pc's and TFT monitors - our new compact adapter technology breaks new ground in, size, weight and efficiency!

Preston designs and manufactures to order specialised high power DC-DC Converters, high efficiency & low RFI, custom shapes (e.g. cylindrical) high speed control loops for quickly fluctuating loads, proven reliability.

WE have the two FET - two diode booster for UPF front ends that does away with the diode bridge!!!

24dBuV per metre measured @ 1m. We cure power supply emissions for a military blood fridge. Conducted emissions down to 10kHz as well

More and more design groups are asking themselves - why wait for the prototype to fail EMC before calling on experienced input from the people who have done it for years...

Non optimal firing of power transistors, instability & susceptibility of a control ckt can result in your power ckt making more RFI than it really has to...