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Old Dec 10, 2012, 07:08 AM
gr8flyer55 is offline
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The stumbling block for almost all DIY HV designs is definitely the transformer. If someone has the time to do a bit of research, we need an easily obtainable transformer that needs little or no rework of the initial primary windings. On my design, the windings are 400 secondary, #36 awg, 16 primary, #26awg, and 8 feedback, #32 awg. A transformer with these figures is very difficult to find. That was why I used a toroid which was hand wound. It is time consuming, very tedious work, but if wound correctly, with near perfect spacing, it is a very efficient design transformer and the cores are cheap. I can buy a pack of 10 cores at Radio Shack stores for a few bucks. There are 2 different sizes in that assortment. I have tried both and had successfully wound both sizes. I would prefer to just order an ecore based unit but finding the right one is very confusing. The ecore size you would need should be in the E-14 to E-16 size. Anyone have either a part number or a place to get them?

John
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