Has anyone ever tried to strip 3/4" hardline COAX cable? It is the stuff they use to broadcast signals on towers and what I have is about 30yrs old or more. This has a 3/16" copper coated aluminum core followed by a layer of polyethylene plastic within a corrugated copper tube in a plastic sheath. It's been sitting around for a couple of years because I haven't come up with an efficient way of stripping it yet.

The trouble I'm having is trying to cut through the corrugated copper layer. The layer is thin but because it's corrugated it makes it much tougher. I tried with a carpet knife but all it would do is scratch it. The other question was is it pure copper or is it alloyed with aluminum?

Thanks!