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Topic: Cyan-dye soundtrack conversion
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Steve Guttag
We forgot the crackers Gromit!!!
Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 01-11-2000 11:35 PM
>>"The sound improvement with the LED readers is pretty dramatic. We got our LED reader a year or so before our DTS unit. A friend of mine called the LED "poor man's digital." While I woulnd't go THAT far, it really does improve the sound a lot."<<I think the improvement you are receiving can more be attributed to the reverse scan optics than to using an LED light source. The LED does offer more uniform light coverate and when it fades, it is more even than a filament sagging. Anyone that has used a Norelco AAII has had these benefits for decades. Steve ------------------
"Old projectionists never die, they just changeover!"
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John Pytlak
Film God
Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000
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posted 01-12-2000 02:47 AM
Information on silverless (dye) analog soundtrack conversion plans is posted on the Kodak web site at:
http://www.kodak.com/US/en/motion/support/sound/ Dolby's and USL's sites also have info. ------------------
John Pytlak, Senior Technical Specialist
Worldwide Technical Services, Professional Motion Imaging
Research Labs, Building 69, Room 7419
Eastman Kodak Company
Rochester, NY 14650-1922 USA
Tel: 716-477-5325 Fax: 716-722-7243
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Steve Guttag
We forgot the crackers Gromit!!!
Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 01-12-2000 10:58 PM
>>"I disagree with the AA2. Granted the steering was incredible, but the slit was too wide! I hear someone is making narrower slits now, though.
I could also do without the melting of the film if the exciter lamp was left on and the machine stopped."<<I don't know how many you worked on or set up but off the ones I have set up, flat out to 16KHz has been the norm (in line with current reverse scan readers). Perhaps you did have unusually wide slits on yours? The exciter lamp thing is the fault of the installer...In the olden days, many houses had exciter lamp changeover and the correct method of installing the unit had a power resistor in-line with the exciter lamp power supply to ghost the exciter lamp if the sound was on that machine but not running. If the projector was running, then the extra pole in the motor contactor was used to jump out the resistor and provide full current to the exciter lamp. Nowadays, one can either keep the power resistor for idle situations or omit it but still used the contactor. Either way, the melting of film is no longer an issue, just bad installation. Steve ------------------
"Old projectionists never die, they just changeover!"
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