Have you heard of any dual coax 50 ohm cables stuck together? I mean, i saw twinax but that is two cores stranded targetting 10GBps LAN topologies, right? Stranded cores are not for analog signals ...

Making use of coaxial cables, is there any performance guaranteed up ... an unpublished application note that discusses cable testing on lower cost cat5 and twinax cable. This data was taken using ...