I am electro-statically trapping particles for chemical and physical studies. I do not want to discuss the details of my research. AC Calibrators are very expensive and I don't need the precision. I did find a power amplifier that could step up my sine wave generator to the values I want, but that is some pretty good pocket change. My advisor says get a transformer. That is what he used in his post-doc days. However, it has been quite a challenge find a transformer than could take the max 7 V rms of the sine generator up to 1000 V rms. Finally after a few weeks of searching, I have found some models from Information Unlimited that has the step up I need, but I am afraid that the current is too low to drive itself through the transformer since that's a lot conductor (the one I was looking at weighs around 24 lbs). Even if it worked, my advisor told me it's a waste of money to buy all that. He said the transformer for our application should weight around pound or two. We are just interested in the potential. I have some quotes on custom transformers I am waiting and few of them are hesitant to make a really low power transformers in fear it will burn out. If had a short in my system , then burning out the transformer would be the least of my worries. Does anyone know if anyone makes step up transformers that can pretty much just steps up the voltage ? Something that is just used to generate the electric field.