Hello I have just recently bought a fiat 500s on a 66 plate and I keep finding that my dab radio has intermittent problems.
Keeps losing signal and I'm unsure as to why it does it.


Can someone help me

If your normal radio is fine ie FM then it's likely poor dab signal in your area, if that's the case there's little you can do, even FM where I am is poor at times.

Probably a faulty ariel base, its a very common problem. Take it back to your Fiat dealer and get it changed on warranty.