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Topic: Dolby cards

Michael Schaffer
"Where is the
Boardwalk Hotel?"

Posts: 4143
From: Boston, MA
Registered: Apr 2002

posted 08-09-2002 10:35 PM

Are there still CP100s being used anywhere? If so, how do you service them? Can you use some of the later cards to replace those in a CP100 or would you have to check and repair all the parts on a defective card yourself?
Michael

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Stephen Furley
Film God

Posts: 3059
From: Coulsdon, Croydon, England
Registered: May 2002

posted 08-10-2002 03:08 AM

The Projected Picture Trust recently installed a CP-100 in the Enigma Cinema at Bletchley Park. Not a 'normal' cinema, but certainly a 100 still in use.

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Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99

posted 08-10-2002 02:06 PM

Many are now in use in home film theatres.
Mark

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Stephen Furley
Film God

Posts: 3059
From: Coulsdon, Croydon, England
Registered: May 2002

posted 09-12-2002 05:47 PM

Frank said:

quote:
Only recently did I replace it with a Valley People compander with fifty-million controls on it that all have to be precisely tweaked. I moved to the compander only because it can be used to add a bit of downward expansion for the surround channel on Dolby A & SR prints, helping to slightly attenuate the crosstalk in quite passages -- good for the folks who are not in that perfectly timed-delayed sweet spot -- a real help in large halls like ours.

Large venue, and you're still running mag prints, that sounds interesting, what sort of place do you work in? Is there much still available on mag over there, there's just about nothing here.

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Frank Angel
Film God

Posts: 5305
From: Brooklyn NY USA
Registered: Dec 1999

posted 09-13-2002 01:33 AM

Actually not much here either. Kit Parker had a lot of mag ranging from decent to barely runable. Now Warners and MGM still have some mags but most come from private archives, like UCLA, MOMA and a few private collectors. We'll keep the mag penthouses because we still have private sources, but the studios have only kept the IBTechs; any of the Eastmans have been junked because they are all red. That doesn't leave much.

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000

posted 09-13-2002 05:46 AM

Frank said: "any of the Eastmans have been junked because they are all red. That doesn't leave much."

The acetic acid vapors from mag-stripe induced vinegar syndrome on acetate print film accelerated the fading of the dyes in color prints made prior to the early 1980's, when Kodak introduced more stable dyes. Both dye fading and vinegar syndrome are greatly slowed by recommended cool and dry storage conditions, and either vented storage containers, or sealed containers with Molecular Sieves to adsorb the excess moisture and acid vapors.

------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243
e-mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion

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Frank Angel
Film God

Posts: 5305
From: Brooklyn NY USA
Registered: Dec 1999

posted 09-14-2002 01:59 AM

I must say, John, those recommendations have served us very well. We have quite a number of original mag prints from the 60s and 70s that are stored at about 55 degrees in open air that is moving and constantly being exhausted. None of these prints have gone into acidosis, although most have warmed considerably, they still retain enough color to be enjoyable to watch. I only wish I had known about all this much earlier on -- perhaps I could have extended their color life a bit longer.

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Steve Kraus
Film God

Posts: 4094
From: Chicago, IL, USA
Registered: May 2000

posted 09-14-2002 10:42 AM

Going back to the CP-100, is there any reason *not* to use

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