Ok guys thank you for your input. I did not expect so many replies so thanks again. Now, the reason I wanted to do it this long winded way around is simply because I have a load of circuits laying around that I have built and played with during my exploration of power supplies thus far. So have all sections of original idea already built apart from the inverter stage. So from what I can gather, I would not be able to get an output "sympathetic" to input voltage with an inverter?. The sine wave to power amp to step up has be put to me before (suggested @ 400hz although I can not remember why this was said) and I do plan to experiment with this also. But as I can find nothing of this idea, or my own on line I can only assume they are not the best ways to go. As for budget I do not have one, in that it is as close to nil as one could get but i do have a big junk pile and maybe up to £30. Dose anyone know of a circuit that has been built that even slightly resembles what I propose?. The 317 circuits i have use two 2n3055 pass transistors for extra current and i have a few quite large transformers in my junk pile. The reason i am thinking pure sine is that i am under the impression that anything other than sine will be hard to get a good dc from and cause noise in audio circuits??. Would it maybe be a viable option to run maybe a 1.5 volt transformer into a power amp and step that up providing the input signal to the power amp does not clip?. And what is a triac dimmer? I have a number of dimmers in my pile but do these not work by chopping the positive peek and so cause noise?. Thanks for reading my post, i wait in hope that someone can answer my questions. I will have more questions for individual replies when it is not so late at night.