I know this is probably a subject that has been beat to death, but what pedals did Waylon Jennings use? I know he used a Phase 90 and a Maestro PS-1a phase shifter. But what else did he use? Here's Austin City limits in 1984. That is not just a Phase 90 and the in amp reverb. It could be a Maestro PS-1a but I can't tell for sure. The next time he played Austin City Limits he used some kind of chorus pedal which you cna plainly hear. My guess would be an something combined with a Phaser. I say MXR because you can plainly see an orange box on top of his amp at times. Furthermore, I'm pretty sure he used an overdrive of some kind when he was with The Highwaymen in 1990. Just listen to the tone he gets in this clip from when they played at the Nassau Coliseum. That doesn't sound like just a cranked amp to me...maybe I'm crazy.