Here in the states Orbitron was a big dish manufacturer. I don't know if in europe there was a company with the same name.
most of the big dish manufacturers have since went out of business. there are a few of them still around. we have several people on the board that either have a Orbitron big dish or know of them. so if you have a Orbitron specific question then ask away we might be able to answer it
Orbitron has not been around for a lot of years, but you may want to get hold of Mike Kole @ global.net, he was a big shot for them years ago, before they closed their doors.