I have access to many 16" radio discs from the 1940s that I'm transferring to CD. Here's the problem which I would like an explanation of, if there is one, and a fix, if there is one of that too. I'm dubbing these from a properly equipped record player directly into the Sony RCD-W500C CD recorder via RCA cables. There's only one RCA out on the player, which I split to two RCA's going into the recorder. I then record a program from the discs...(30-minute programs, approx. 15 minutes per side). Afterwards, I finalize. Now, a number of these CDs have a hard time, and in some cases, won't play at all on any other CD player I have, including other Sony units. However, they play just fine on another RCD-W500C that I have. On CD units they won't play on at all, when you press "eject", and the tray comes out, the disc is spinning real fast. Is this a unit problem? A CD problem? Are there CD's that Sony units "like" better then others?