5M SPDIF cable

[Speedskater]

RG6 is an old generic designation for a 75 ohm cable with about a 1/4 inch outside diameter and a 18AWG center conductor. Many different models optimized for different parameters fit this basic designation.

With well designed input and output stages any good 75 ohm cable should work at over 15 meters (50 feet).

[Speedskater]

21 hours ago, sandyk said:

  The qualifier here is any good 75ohm cable.

Not all 75 ohm cables have better than average shielding, which becomes more important at longer lengths.

Just about any 75 ohm coax from Belden Canare or Mogami that is not optimized for cable TV frequencies  (that would be approaching 1 GHz).