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Hi, Marie,

I would love to see photos of your latest as well.

Shai jumped a beat. Unwinding tapes that stick together is done 
slowly, but playing tapes that squeal at a faster speed will 
sometimes change the dynamics of the mechanical system enough to 
avoid the squeal--or at least move it up to a point where it no 
longer is in the audible frequencies (further analysis needed). On 
the other hand, a different tape path is also sometimes a solution. 
The Racal instrumentation (IRIG) machines seem to do that well,  but 
post-eq is required in the DAW. I wrote about fast playback of tapes here:

http://richardhess.com/notes/2007/11/08/success-with-squealing-shamrock-031-tape/

related info on the Racal here:
http://richardhess.com/notes/2007/11/21/how-to-play-4-track-1875-ins-tapes/
and
http://richardhess.com/notes/2008/01/09/using-the-proper-toolsand-dont-try-this-at-home/
and
http://richardhess.com/notes/2008/04/15/a-solution-to-reduce-spoking-in-old-acetate-tapes/

Cheers,

Richard

At 04:14 AM 2009-12-16, Marie O'Connell wrote:
>I don't think Richard meant fast, infact, slow.....lllllllll.......yyyyyy is
>very helpful.  We have modified 2 of our Studer B67 to be low friction
>machines and that has helped alot.  I can send pics when I get back to work
>in the morning.  I rarely use the isopropyl drip machine now because of
>these 2 .  They do a grand job.
>
>Cheers
>Marie
>
>On Wed, Dec 16, 2009 at 8:17 PM, Shai Drori <[log in to unmask]> wrote:
>
> > It's sad to hear Peter passed away. His knowledge was extensive and his
> > humor was in the best British tradition. I wonder if I have a 
> picture of the
> > thing somewhere. BTW, I didn't think about playing squealing tapes fast,
> > that's a good idea, Thanks Richard. I'll try it next time a tape comes in
> > that does that. I didn't think about it before but I now realize that all
> > the tapes that squealed  were 3.75ips.
> > Shai
> >
> >
> > Mark Campbell wrote:
> >
> >> Please tell us more about the "grandfather clock" tape recovery machine.
> >>
> >> Mark
> >> -----Original Message-----
> >> From: Association for Recorded Sound Discussion List
> >> [mailto:[log in to unmask]] On Behalf Of Shai Drori
> >> Sent: Wednesday, 16 December 2009 8:12 AM
> >> To: [log in to unmask]
> >> Subject: Re: [ARSCLIST] Tape Shed-Sticking & stripping
> >>
> >> This reminds me of the "grandfather clock" thingamajig I saw at the
> >> British library. It is a large board with rollers that the tape goes
> >> through making a serpentine. The tape travels very slowly and can be
> >> heated or chilled as needed. They made this for some agfa tapes that
> >> stuck. I have never had a 3m 176 make trouble but this sounds like many
> >> 50's 60's tapes I transfered that were of American origin. One squealed
> >> so bad we had to soak it with silicone. I am wondering it there is a
> >> benefit to slow winding under a cold air blast, like an air conditioning
> >> duct pointing at the transport. My a/c/ has a setting for drying the
> >> air. Very cold air forced out and the rh drops very fast..
> >> Shai
> >>
> >> Richard L. Hess wrote:
> >>
> >>
> >>> Hi, Martin,
> >>>
> >>> This is very problematic, and I do NOT think baking is a good idea.
> >>>
> >>> There is a CHANCE that month-long cold soak in a desiccated atmosphere
> >>>
> >>>
> >>
> >>
> >>
> >>> (silica gel inside double freezer (or foil) Zip-Loc bags in the fridge
> >>>
> >>>
> >>
> >>
> >>
> >>> (not freezer)).
> >>>
> >>> It has worked for some 3M 176 that showed this symptom. It has also not
> >>> worked for other tapes. Jim Wheeler gave me this technique. I 
> don't know his
> >>> source. I haven't used it much.
> >>>
> >>> The other thing to try is VERY slow unwinding - 1.88 in/s or slower.
> >>> Sometimes that alone helps.
> >>>
> >>> The tape in the photo was baked based on a consensus of the people at the
> >>> seminar (including the tape owner) because we didn't have time for
> >>>
> >>>
> >>
> >>
> >>
> >>> cold soak and we wanted to see what would work (or not).
> >>>
> >>> Since that article, I have had good results with 3M201 which had the same
> >>> problem and the 1.88 in/s wind-through solved it.
> >>>
> >>> Good luck!
> >>>
> >>> Cheers,
> >>>
> >>> Richard
> >>>
> >>> At 12:34 PM 2009-12-15, Martin Fisher wrote:
> >>>
> >>>
> >>>> Got a polyester/plastic non-backcoated reel in which the binder is
> >>>> stripping off onto the adjacent wind.  AKA "binder adhesion to 
> back of next
> >>>> layer" on Richard Hess' site.
> >>>>
> >>>> http://richardhess.com/notes/2006/05/26/binder-adhesion-to-back-of-ne
> >>>> xt-layer/
> >>>>
> >>>>
> >>>> Might baking be a solution for this?
> >>>>
> >>>> Martin
> >>>>
> >>>>
> >>> Richard L. Hess                   email: [log in to unmask]
> >>> Aurora, Ontario, Canada       (905) 713 6733     1-877-TAPE-FIX
> >>> Detailed contact information:
> >>> http://www.richardhess.com/tape/contact.htm
> >>> Quality tape transfers -- even from hard-to-play tapes.
> >>>
> >>>
> >>
> >>
> >>
> >

Richard L. Hess                   email: [log in to unmask]
Aurora, Ontario, Canada       (905) 713 6733     1-877-TAPE-FIX
Detailed contact information: http://www.richardhess.com/tape/contact.htm
Quality tape transfers -- even from hard-to-play tapes.