I don't even need a replacement, I'm sure I have something around. I just need to know what voltage and polarity it was. There aren't any markings on it anywhere and I've misplaced the manual. I'm pretty sure it was 9v but I'm not positive. If you have one/use one/work near one, take a look at the adapter PLEASE! I doubt it matters since they all use a 6v battery but it's a Tesa-Hite 600 Plus D.