Does anyone know where to find information about track widths of various recording formats? I’m interested mainly in the TSR-8 and 688, but I also want to know about the large formats like the Studer A820 24 track, for example. I’ve read in forums that the TSR-8 has similar track width to 24 track 2 inch machines (only with a smaller gap between tracks) and am curious if this is true. Surely there are some reference materials on this somewhere.