If its marked 220 plugging into 120 will not hurt it. I'd plug it in and see if you get 27 volts out of it. My first Oracle was a Mk II, I got used and the power supply was broke. Took it apart, just a transformer, diode and cap. The lead broke off the transformer, resoldered and put a new cap in it and worked fine. It will run the table without the stabilizer. I got 27v out of my stabilizer, was going to try to rebuilt that also, but it was potted with very hard epoxy. Forget getting replacements from Oracle. Looked into it. You have to upgrade the motor and power supply, which means getting a whole new base and having your sub-platter machined. Probably cost more than what you paid for your table.
Oracle MKV Turbo - Graham 2.2 - Benz Ebony H - Blue Circle BC27pi