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In Reply to: RE: Speaking of 707s and old tape posted by LtMandella on January 11, 2020 at 18:30:25
Tape dust is fine. If you have sticky-shed, you'll know it (and regret it.)
You mentioned in the other post using 456. I would never touch it. Save the reels if they're any good, and toss the tape.
I attached the link to Richard Hess' excellent paper on tape degradation.
WW
"I'd crawl over twenty miles of bad country to listen to you pee in a tin cup on the telephone." (Jo Carol Pierce)
Follow Ups:
thanks for the link, very helpful!
There must be something wrong with me for not having something wrong.
thanks Jim,
I am using Quantegy 456. I have read conflicting info - that they changed the formula to eliminate the shedding, and also conflicting info that it has the same problem as Ampex.
Have any experience with the Quantegy?
There must be something wrong with me for not having something wrong.
Bill is correct, not sticky shed.
if you have it, the tape will bind up on the deck and bring the transport to a halt.
Then you'll have a clean up mess to remove all the gunk before you can play another tape.
Great, so far: no sticky shedding.
Is it possible to detect a sticky tape problem visually or tactically, before trying to playback and messing up the tape transport?
There must be something wrong with me for not having something wrong.
Nope. You can't tell by looking at the tape or by touching it. While back-coating is NOT the reason for sticky-shed syndrome, all of the tapes that have SSS are in fact back-coated, so that's one sign you should be careful.
If the tape in question doesn't have valuable/irreplaceable program material, then just rewind a small amount and then look at the tape lifters. If they're gunky, then the tape has SSS. It either needs to be thrown out, or baked so it can be played for a transfer.
If the tape contents are valuable, bake first, then play to transfer (either to another reel, digital, or both).
Rob
"Let there be songs, to fill the air"
I'll just add that the problem is the binder which "glues" the oxide to the substrate. Over time, it absorbs moisture, and becomes "gummy".
Many years ago, I built a tape baking "oven" to overcome the problem, since I have many 70's vintage tapes on Ampex 406/407/456 and others.
Maybe since I am living in the desert now, my tapes will naturally lose any moisture that has invaded their guts...
There must be something wrong with me for not having something wrong.
KYI. Ampex tape baking patent
http://www.richardhess.net/restoration_notes/USP5236790.pdf
Yeah, I've been aware of the patent itself since about 1999. I first delved into this area in about the mid-nineties. At some point around then, I found an article on Wendy Carlos' site (wendycarlos.com). This was quite by accident, while I was looking for information on photographing a solar eclipse.
lol, i'll go ahead and send those idiots my payments: $.0000000000000000000001 per foot of tape baked.
is this type of thing a consequence of the stupidity of the patent officers or of patent law itself? or both?
There must be something wrong with me for not having something wrong.
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