Julie Andrews Here's some more "tape lore", if lore is the word I want. The Ampex 456 1" tape reel in center is labelled "MT HH Reel 2". "Reel 2" is self-explanatory, and "MT" obviously = "MT(X)." But what the heck is "HH"? Well, it's lucky I am the archivist, because I'm...See more