This is topic Cyan-dye soundtrack conversion in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.
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Posted by Andy Davis (Member # 262) on 01-11-2000, 02:07 AM:
Any idea when prints will start showing up with cyan-dye soundtracks? My theatre still uses exciter lamps and I was curious how much longer we had to put off an upgrade. We have digital sound in all of our houses so the change isn't absolutely critical right now.
Posted by Stephen Jones (Member # 16) on 01-11-2000, 04:36 AM:
I understood it was suppose to be some time in 2000 I could be wrong but they keep changeing their minds.------------------
Posted by Ari Nordström (Member # 288) on 01-11-2000, 06:12 AM:
The latest info from our local tech is one to two years, according to the info he got. His guess was that it would take at least two.In the mean time, we're looking for a cyan-dye soundtrack reader that will fit into a Zeiss Favorit70 (Prevost P70) machine without too much trouble. Does anyone of you know of a company that makes laser scan readers (or any other workable solution) for this projector?
Posted by Tim Reed (Member # 137) on 01-11-2000, 02:29 PM:
The information I got several years ago, which prompted me to SELL READERS like hotcakes, was that cyan-dye tracks were supposed to already be in abundance by now.And now, nothing! Sure got egg on my face over THAT one!
Posted by Mike Blakesley (Member # 26) on 01-11-2000, 06:30 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.
Posted by Steve Guttag (Member # 268) on 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
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"Old projectionists never die, they just changeover!"
Posted by Brad Miller (Member # 2) on 01-12-2000, 01:01 AM:
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.
Posted by John Pytlak (Member # 331) on 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.
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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
Posted by Greg Mueller (Member # 17) on 01-12-2000, 09:56 AM:
"I could also do without the melting of the film if the exciter lamp was left on and the machine stopped."
Brad
I have installed in mine, a resistor that lowers the voltage and therefore the light output when the motor is not running. The fix is in the Norelco manuals and updates. Works well.
Posted by Steve Guttag (Member # 268) on 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
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"Old projectionists never die, they just changeover!"