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Author Topic: Cat 702?? Ken Lackner Phenomenal Film Handler Posts: 1907 From: Atlanta, GA, USA Registered: Sep 2001 posted 01-05-2003 09:20 AM                     Dolby has a Cat 702 soundhead on their website. It looks the same as the 701. How is it different?  |  IP: Logged Jean-Michel Grin Expert Film Handler Posts: 222 From: Geneva & Lausanne, Switzerland Registered: Jul 2002 posted 01-05-2003 10:08 AM                        Maybe the red Led illumination device ?  |  IP: Logged Richard Fowler Film God Posts: 2392 From: Ft. Lauderdale, FL, USA Registered: Jun 2001 posted 01-05-2003 10:12 AM                     It is like the BACP/USL penthouse since the 702 does not require an internal power supply and cord....the power for the LED and pre-amplifier is tapped from the voltage rails from the digital cable...a sharing of technology even if they do not publicly admit the source  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 01-05-2003 10:24 AM                     Another "borrowed" idea is that it has "go/nogo" LEDs that are visible through the cover to indicate if the LED level is sufficient Steve  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 01-05-2003 10:27 AM                     Indeed, you are right. Dolby reportedly made a deal with Jack Cashin to use the design as well as some of Jacks Light meter stuff in the 650 to make it track SRD better. Of course, Dolby has to be at least a tiny bit competitive to be able to sell product..... Mark @ CLACO  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 01-05-2003 11:35 AM                     To bad USL/BACP never followed through with the original idea of their penthouse having the both SRD pickup and a DTS timecode reader allon the same unit  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 01-05-2003 12:14 PM                     I wonder if thats covered by some still valid DTS patent? Mark  |  IP: Logged Christos Mitsakis Expert Film Handler Posts: 242 From: Ag.Paraskevi, ATHENS, GREECE Registered: Sep 1999 posted 01-05-2003 02:02 PM                     So has the time come for Cat701 to pass to history? As I understand, for some time Dolby will have both in catalogue. If you have to choose now a penthouse DD head which of the two would you choose 701 or 702? Or should you also consider USL/BACP? Indeed, less wires the better, but I have to say that I am happy with Cat700 and 701. Christos  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 01-05-2003 04:06 PM                     I think the 701 is history. In a free marketplace, you should always feel free to chose whomever's product you feel gives you the best value/performance. As to the lack of DTS...the rumor was to having the Dolby license (and hence, supply of the CCD board) they couldn't make a combo reader. If the rumor is true, it was a dumb stipulation since if someone was to buy the reader, they would have a Dolby Digital system in there anyway. Steve  |  IP: Logged Ken Lackner Phenomenal Film Handler Posts: 1907 From: Atlanta, GA, USA Registered: Sep 2001 posted 01-05-2003 04:18 PM                     What is USL/BACP?  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 01-05-2003 04:27 PM                     USL= Ultra Stereo Labs BACP= Bay Area Cinema Products  |  IP: Logged Richard Fowler Film God Posts: 2392 From: Ft. Lauderdale, FL, USA Registered: Jun 2001 posted 01-05-2003 04:28 PM                     BACP is Bay Area Cinema Products, which is run by Sam Chavez who until the early 1990's did cinema marketing for Dolby. He is one of the key people who pushed the LED reverse scan idea which is now common. After leaving Dolby he was for a while at Component Engineering before setting up BACP. USL is Ultra Stereo Labs which manufacture BACP product in a joint partnership with Jack Cashin, the only other man to get an Academy Award for optical sound improvement in addition to Ray Dolby.  |  IP: Logged Rick Long Jedi Master Film Handler Posts: 759 From: Toronto, Ontario, Canada Registered: Nov 1999 posted 01-06-2003 12:44 AM                     Sorry, slightly off topic but.... I did a search for this, honest, but couldn't find the answer. Anyways this seemed like a good as any topic to dump this in. I have a few 701's which do not give out the required level (this after led power supply adjustment). This causes me to think that the l.e.d.'s are a little old. Are these l.e.d.'s field replaceable? A few other units have failed also giving no output whatsoever, causing me to think the CCD board has failed. I notice that the CCD itself is installed in a socket. Is the CCD the likely suspect and if so, can it be replaced in the field or should the whole board be replaced? Out of desparation, I tried putting a CCD board from a 701 into a 700 sound-head. I had to reduce the links to the X1 position to drop the signal level, but it seemed to work ok although there did seem to be a little resistance to dropping to SR on the loop splice. I should mention that these tests were all done in a shop with the same Dolby (CP-500) test jig. Thanks in advance, for any help.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 01-06-2003 07:57 AM                     The RED LEDs have dimmed to the point of being unusable. God you just gotta love the visible red LEDs...more unstable than an exciter lamp at seven times the price! The LEDs are field changeable. The LED itself is available (you'll need to be handy with a soldering iron) or by changing the whole head assembly out. Steve  |  IP: Logged Rick Long Jedi Master Film Handler Posts: 759 From: Toronto, Ontario, Canada Registered: Nov 1999 posted 01-06-2003 09:12 AM                     Thank you, Steve. Warming up my 100-watt American Beauty as we speak.  |  IP: Logged

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