Chosen Solution
It looks like that thing predates modern “Switching” power supplies. That being said, it is therefore highly unlikely that you could convert it with just a soldering gun, a plug and some wire. If it was made for the US/North America market and you are now in Europe what you need is a step-down transformer. (Europe uses ~210V US is ~110) Creating a replacement power adapter board is beyond my pay grade If you do get an adapter, make sure it is a transformer. Switching power supplies like those used in laptop power bricks, and cell phone chargers can adjust their operation for 110 vs 220 operation. Inexpensive adapters only convert the plug and rely on the power supply on the other end to deal with the voltage adjustment.
