MikeN wrote:

I have a 30 metre length of large diameter coax which I need to
identity to ensure I get the correct connectors.

The cable is about twice as thick as RG213, and has the following
parameters.

Sheath is 22mm OD black PVC. or PE
Inner conductor is a single solid 5 mm dia copper conductor
Outer conductor is bare copper braid.
Dielectric is solid polyethylene

I think this coax is UR 74 or perhaps UR 74M (is there a difference?).

Could someone confirm my identifcation or put me right if I'm in
error.

Thanks

MikeN ZL1BNB

is there nothing marked on the outside?