It was a BBC series, an adaptation of the Winston Graham novels set in the late 18th century in Cornwall. It was shown from 1975-1977. Robin Ellis played the part of Ross Poldark - he was a bit of a heart throb!
I thought Demelza (played by the late Angharad Rees), was the most beautiful name I had ever heard, and vowed that if I ever had a daughter, that would be her name! Thankfully I had two sons.
I remember being glued to the TV when this was on. I read all the books too. Hope the remake is good.