Thanks for all the responses. I was thinking the "digital coax" cable was just a regular coax with RCA ends but wasn't sure. I ended up just getting a GE "Digital coax" for $9.99. If I was going to make my own, RCA ends at Home Depot are like $3.00 a piece so I don't feel like I paid all that much more. By the way, the equivalent "digital coax" in Monster Cable was $19.99!