Mike from NYC:
Uncle Chick:Also, while "Relax" is noted as incomplete, no mention is made of the fact that "A Quick One While He's Away" is also incomplete. The first part of the song is missing and begins with the Ivar the Engine Driver section.
They ran out of tape which is why there are the gaps in Rael/Relax and A Quick One.
I don't think so. Every version of this show I've heard, including the one here, seems to be sourced from acetate. There are clicks and pops all over and sibilance is often quite bad, as if the stylus wasn't tracking well. Relax is particularly distorted, which would make sense if it was the inner track on an acetate. Note that My Generation also fades out.