Though we’ve never used their cables, [Blue Jeans Cable] out of Seattle, WA sure does seem to take the black art of cable manufacture seriously. When they read the Cat 6 specification, they k… ...

Cat 6 is cable that's more reliable at higher speeds than Cat 5 or Cat 5e. They look pretty much the same; in fact, Cat 6 is backward compatible with Cat 4, so you can mix and match.

Yes, correct. The resulting 50 ohm two-paired line would still be a balanced line and you’d want a balun. Trying to run eight RF lines down CAT6, expecting 50 ohms, is going to result in a ...