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Author Topic: CYAN DYE tracks FACTS OR FICTION Ken McFall Jedi Master Film Handler Posts: 615 From: Haringey, London. Registered: Apr 2001 posted 05-25-2004 05:28 PM                     Gordon & Peter, I don't think Frank is saying he has a Kalee model '1' projector, did such a model even exist. He in fact says he has '1' Kalee projkector used in a drive in! It would help if he was to give the model number.  |  IP: Logged Steve Kraus Film God Posts: 4094 From: Chicago, IL, USA Registered: May 2000 posted 05-25-2004 05:50 PM                    John, just what is the effect of the IR flooding through? Seems to me that it would just create a constant DC offset on the solar cell output which would be eliminated by the differential input of the preamp.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-25-2004 06:45 PM                     IR flooding through would definately bias the input differential and not necessarily be cancled out just because it is a differential pair... and not all preamps use a differential pair input anyway. Mark  |  IP: Logged Kenneth Wuepper Phenomenal Film Handler Posts: 1026 From: Saginaw, MI, USA Registered: Feb 2002 posted 05-25-2004 07:36 PM                     The old Ballantine 6/4/1/ solid state system had transformer input to the optical preamplifier. The current from the solar cell would saturate the core of the little transformer and so we had to insert a capacitor to isolate the DC component from the signal input. This method of DC removal is very effective. In low impedance circuits you have to use a large capacitance to transmit the low frequencies. KEN  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 05-25-2004 08:10 PM                     except the old Ballantine 6/4/1 solid state sound system was a bitch at the best of times to service and as they got older keep working  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 05-25-2004 08:29 PM                        I suspect that since over half of the energy from a tungsten lamp is in the infrared, and there is no silver to modulate it, you could easily drive the cells to near saturation.  |  IP: Logged Frank Jerkic Film Handler Posts: 77 From: Ayr Queensland Australia Registered: May 2004 posted 05-25-2004 09:50 PM                        Good day again The Century's I own are fitted with the TR4B sound reproducer, one has never been converted to stereo (same as it left the factory) the other was changed to stereo by moving the exciter light to the end where the solar cell was originally fitted. The Kalee soundhead is the 890 which is stereo for the drive in, the solar cell runs straight into a preamp-FM STEREO transmitter, The Drive in went Stereo years ago and our first Stereo movi was WILLOW  |  IP: Logged Peter Hall Master Film Handler Posts: 314 From: London, UK Registered: Dec 2000 posted 05-26-2004 10:48 AM                        Steve - Yes, it is close to $1000, but you never need to replace any LEDs... Ken - I have never seen a Kalee 1 - even City Screen didnt use gear that old - but I have run Kalee 2s in NZ so I assumed that there was an older brother. Or maybe Kalee has emerged from the ashes and is taking a leaf out of the Star Wars book and releasing #3 before #1 (or 19/20/21/37 before 1).. Maybe it's a new model !!!  |  IP: Logged Ken McFall Jedi Master Film Handler Posts: 615 From: Haringey, London. Registered: Apr 2001 posted 05-26-2004 02:22 PM                     Peter, Kalee 11 is the oldest I've used..... I was just pointing out that I don't think he has a model 1!  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 05-26-2004 08:31 PM                     Peter, I know on Ernemanns I've had to replace lasers...they were more expensive than the LEDs Steve  |  IP: Logged Peter Hall Master Film Handler Posts: 314 From: London, UK Registered: Dec 2000 posted 05-27-2004 08:36 AM                        Yes, I've had the same ecperience with the Ernemanns - we use a different laser.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 05-27-2004 09:42 AM                     The only ernamann lasers I have had to replace were with Xetron consoles and it was felt that the RF from the ignitors had caused the failures as they had also failures of the MCU in the TA10 automations mounted in the same consoles  |  IP: Logged Peter Hall Master Film Handler Posts: 314 From: London, UK Registered: Dec 2000 posted 05-28-2004 09:05 AM                        Interesting Gordon - I think you are onto something. The Erneman ones we have changed were on Ernemann 15s, which I believe borrowed a lot from the Xetron lhouses. Also all but one failure we have had were of lasers in l-houses with bad electrical installations, and the one exception was for a broken lens cover where the processor manufacturer's tech (doing a line up for a premiere) broke it. Which could bring me to another discussion thread on the frustration of the toos and froos of a processor manufacturer's tech "lining up" a theatre with a single mic in 5 minutes (prior to a premiere etc) and drastically changing settings made over hours of work with a R2 or similar.. And the theatre sounded like poo.. (we now xerox the C64s on a 55/65/200 so that the theatre can hit the "undo" button - easier on a 500 or 650 of course) I had one such tech tell me that he needed to roll off the bass to compensate for tube train noise breaking thru to the theatre... Ken - fair point. Maybe the machine is so old that the first 1 of the 11 has worn off !  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 05-28-2004 09:25 AM                     Peter for several houses that I service that get a lot of visiting "engineers" re tuning for one offs I have a spare set of eq cards there they get to use  |  IP: Logged

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