Originally Posted by podz
You can hire an electrician to come to your house and wire you up a few 110v sockets. Yeah, I know it's possible because I had it when I lived in Germany. They are still 50hz, though.
It's possible to have 120 60 Hz from 240 50 Hz if you are willing to spring for an MG set (or more modern electronic rectifier-inverter system). It is not possible to go from 240 to 120 without some kind of steel i.e. MG set or transformer (far more practical but no frequency conversion). When the 110 sockets were installed in your German residence a central transformer must have been installed somewhere. This may, of course, be an option for OP.