tv
 

can anyone tell me can you use the built in tv aerial in rear screen for a after market digital tuner .can you buy adapter ?

I have tried and failed.

Same here. I looked into doing the same a while ago, but gave up. Not so much because of technical difficulty (since I have 30+ years experience as an electronics design engineer), but more through lack of information. I came to the conclusion it was going to take too long to figure it to be worth the hassle.

If I remember correctly, it's an active aerial, meaning that you'll need to provide it with power. I think it's usually powered over the coaxial cable by the receiver. With the right information, it could be done, but you would need to know the power requirements and impedance to make or source a suitable adaptor.