Just repairing my elect antenna and needed to replace the cable. I have never seen coax with no core. I poked a wire down the middle and there is nothing. It only had a little connector on the end of it. Has anyone seen anything like this.
All coax cable has a small wire down the middle usually covered by a sheath and then by a braided outer conductor. The small inner wire probably pulled out when the cable was disconnected. You might want to check the other end of the cable for the small wire.