Just a thought which came into my mind and maybe someone thought of this before.....what about using a Bally E122-125 transformer? Those used in the classic Bally solid state games like Mata Hari, Star Trek. This *might* be an option for 120VAC areas. Configure the transformer for 220VAC or 240VAC and connect it to 120VAC. The secundary voltages are now about half as specified. Use the 7VAC outlets and/or 12VAC outlet (normally for GI/controlled illumination/Logic) for display offset voltages. Use the 173VAC for the displays (now about half this value). The 43VAC (lugs 2 and 6) has an additional lug (4). Use Lugs 2 and 4 for the logic voltage now. This might be worth trying. First measure the secundairy outputs before your first attempt please! The values may be to far off. I never tried it ( I live in an 230VAC area also) but maybe it is a solution.