Hello Armin,
Radio and batteries in the hand luggage is recommended. Make sure that the batteries have the Watthours on the label. This is what the airlines have as criteria. Usually it is <100 Wh.
Maybe bring your licence (or at least a copy) with you.
Everything else in the check-in luggage is fine.
Worked for me several times. There is also a reflector thread about airport security with weird stories. So no guarantee but in Europe you should be fine.
Here the airport security topic:
73 Joe