Tv On Laptop

[patmyhead]

What would i need to get to watch tv on my laptop & how would a aerial be conected is there some thing easy to use that i can get, as i would like to use it in the motorhome that i intend to get
Also is there a way to power the laptop in the motorhome the laptop requires 19volts to run is there a converter that will input 12 volts & output 19 volts
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[dgc]

I have one of these...

http://www.mdsbattery.co.uk/shop/productprofile.asp?ProductGroupID=1244

It will output dc at 15/16/18/19/24 and comes with a set of adaptors to fit most laptop power inputs

Great for powering from 12v supply on plane/train/car...or motorhome.

As far as the tv is concerned I would suggest a nebula digitv usb but I'm not sure you would have a suitable ariel or always be in a freeview area. Might be best to stick to analogue.
No personal experience of analogue tv cards