Top Pops #63

I was listening to some TPs, the early ones had locked grooves.  LOCKED GROOVES, who remembers those?  If you don't, what a locked groove would do is just stop after the song.  That made it harder to leave the switch open and run the next song accidentally.  Pronunciations?  It was never a regular thing, I only remember rarely seeing them.  At least no one could say Joe Maphis wrong!