To add to what RCyyz and weekilter said ...

Voltage converter? If yes, that is the problem. All he needs is a plug converter for Turkey. Most (virtually all) electronics are universal devices. They will say something like 110v - 240v, 50hz - 60hz on them if they are universal. You just need a plug converter for universal devices.

I think he just needs the standard European plug converter, which converts the US style 2 prong (or 2 prong plus ground pin) plug to the standard European 2 round pin plug. Apple even makes a set of converters that let you slide out the one on the power wart and slide in the one you need. Or you can buy cheap universal plug to European plug adapters inexpensively from places like dealextreme.com

Here's the old Apple world travel set (included power adapter is pre-ipad version, but that's not the part he needs):
http://www.dealextreme.com/details.dx/sku.37208

Universal to Europe plug adapter:
http://www.dealextreme.com/details.dx/sku.13525