>>12137338
If you look closely in the picture of my collection you can see that mine is still miscalibrated from when I bought it. I took some electrical repair classes in college, so I dug up the old factory service manual online, put on some heavy rubber gloves and opened it up to fuck with it. I thought it was just the X and Y adjustment potentiometers or the CRT centering rings being misaligned. Turns out it was neither of those, so I'm waiting for a slow day at work so I can take it in an use a company oscilloscope to further diagnose it. I probably should buy a multicart with the factory test program before I do that, too.
Take extra care to NOT TOUCH the inside of the CRT if you open up the Vectrex, it can and will kill you if you're not careful.