roy@gitpyr.UUCP (Roy Mongiovi) (08/31/84)
Am I missing something or what? It seems to me that if you consider a
reel of tape to be magnetic medium separated by air and plastic, then
it looks something like this:
layer N - 1 | air | plastic | layer N | air | plastic | layer N + 1
Anyway, it seems to me that there is the same distance between layers
N - 1 and N as between layers N and N + 1. Why do some of you say that
one layer is closer to another? It looks like a pretty close tie to me.
Shouldn't print-through be the same in both directions?
--
Roy J. Mongiovi. Office of Computing Services.
Georgia Institute of Technology, Atlanta GA 30332
Phone: (404) 894-6163, (404) 894-4660 [messages]
...!{akgua,allegra,amd,hplabs,ihnp4,masscomp,ut-ngp}!gatech!gitpyr!roy
...!{rlgvax,sb1,uf-cgrl,unmvax,ut-sally}!gatech!gitpyr!roydmmartindale@watcgl.UUCP (Dave Martindale) (09/03/84)
Am I missing something or what? It seems to me that if you consider a reel of tape to be magnetic medium separated by air and plastic, then it looks something like this: layer N - 1 | air | plastic | layer N | air | plastic | layer N + 1 Anyway, it seems to me that there is the same distance between layers N - 1 and N as between layers N and N + 1. Why do some of you say that one layer is closer to another? It looks like a pretty close tie to me. Shouldn't print-through be the same in both directions? The layers of tape are equally spaced. However, the oxide on the tape isn't necessarily recorded to its full depth. High frequencies, in particular, tend not to go very deeply into the oxide. So print-through won't necessarily be the same in both directions.
steve@ea.UUCP (09/08/84)
#R:gitpyr:-17700:ea:1000008:000:1359
ea!steve Sep 7 17:19:00 1984
not really from Steve,
but from Mike Andrews on his tty and with his consent
There are two ways to store tape: "tails-in" and "tails-out". A tape is
"tails-in" if it is rewound after being played or recorded, and
"tails-out" if it is left on the takeup reel after being played or
recorded. Note that a "tails-out" tape must be rewound to be played.
The reason for storing tapes "tails-out" is to put them on the reel
at a constant tension, rather than at the variable tension imposed by
rewind motors at full-tilt-boogie. It seems to me that print-thru will
be more apparent in those layers that are at higher tension, and
(from my experience producing an early-music radio show for 6 years)
that rewind on all the machines I've used is at much higher tension
overall than that imposed by the takeup-mode motor.
Mind you, I have no theoretical basis for my statements, and I hope
you won't flame Steve for them; I'm the one who typed this missive. How-
ever, it does seem that it works that way in practice. Perhaps that's
why most recording studios, networks, stations, etc. store their tapes
"tails-out".
I am obliged to you all for your kind attention.
Mike Andrews
PS. I will gladly forward responses to mike...
Steve Blasingame (at Oklahoma City University)
ucbvax!mtxinu!ea!steve