I live on a narrowboat, it has a Travelsat mini dish which has a single LNB. My Humax box died a death which I have replaced with a Freesat 4K recordable 1TB box. The Freesat manual states it needs a widebeam LNB. Can anyone advise on a suitable widebeam LNB that would be compatible. I have also replaced the single coaxial cable with twin.