I don't know if i will be able to use my existing yoke or not. The v ohms is 8.2 and the horizontal is 2 ohms. I need to get them2628H chassis that doesnt require the isolation transformer. Ken, given the impedence of my yoke, will this chassis be a perfect swap or will i for certain need the yoke as well? Also, if I do have to get the yoke, does this mean i have to align the convergence /purity rings ?