Quote Originally Posted by Urbania View Post
1. In the documentation for the L297-8 drivers PMinMO mentions the fact that we can use LM138/338's instead of the LM317 voltage regulators. My question is, is the LM338K a drop-in replacement for the LM317? (with obvious regard for the BCE configuration, and the maximum current rating of the L298's )
Regards,
Wayne
Where do I say you can sub a LM138..LM338?

As far as I know the LM138..LM338 are only available in TO-3 packages. The pcb for the L297-8, the LM317 is a TO-220. Two entirely different mechanical packages.