my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » cat 700 bulb

Author Topic: cat 700 bulb Mike Carro Film Handler Posts: 67 From: Tempe, Az USA Registered: Nov 1999 posted 09-15-2003 05:37 PM                        I know I should know this but what is the exact bulb to use for the cat 700. I very rarely have to change mine but I think it's due and I can't find a number or specs anywhere. Thanks I know it's a 10 volt but what's the wattage?  |  IP: Logged Art Averett Film Handler Posts: 14 From: Orlando, FL Registered: Mar 2000 posted 09-15-2003 06:39 PM                     Mike, the lamp is coded EPT. An easy way to remember is Early Pregnancy Test.  |  IP: Logged Aaron Sisemore Flaming Ribs beat Reeses Peanut Butter Cups any day! Posts: 3061 From: Rockwall TX USA Registered: Sep 1999 posted 09-15-2003 07:26 PM                     Another alternative to the EPT is the EXZ bulb, preferably the one made by Osram. -Aaron  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 09-15-2003 08:51 PM                     Another tid-bit...only the GE version of the EPT works. Apparantly the EPT wasn't as well standardized as it should have been so other forms of EPT will have drastically inferior video levels. Steve  |  IP: Logged Aaron Garman Phenomenal Film Handler Posts: 1470 From: Toledo, OH USA Registered: Mar 2003 posted 09-15-2003 08:58 PM                     We just replaced one of these. Anyone have an estimate on how often this is done or should be done? AJG  |  IP: Logged Mike Carro Film Handler Posts: 67 From: Tempe, Az USA Registered: Nov 1999 posted 09-15-2003 09:05 PM                        Thanks to all I appreciate the help  |  IP: Logged Aaron Sisemore Flaming Ribs beat Reeses Peanut Butter Cups any day! Posts: 3061 From: Rockwall TX USA Registered: Sep 1999 posted 09-16-2003 02:42 AM                     quote: We just replaced one of these. Anyone have an estimate on how often this is done or should be done? When the error rates start going up or the system begins reverting to analog, check the bulb. If it shows even the least bit of 'fogginess' on the reflector, regardless of the condition of the bulb filament , then the bulb must be changed. -Aaron  |  IP: Logged Chris Hipp Phenomenal Film Handler Posts: 1462 From: Mesquite, Tx (east of Dallas) Registered: Jul 2003 posted 04-29-2004 12:02 PM                     Do any other A-chain adjustments need to be made after changing the bulb? I can't see how it would as long as the light tube is not removed. I have four cat 700 readers with their original bulbs from 1998. We rarely used the dolby before, but I would like to get away from SDDS as much as I can.  |  IP: Logged Scott Norwood Film God Posts: 8146 From: Boston, MA. USA (1774.21 miles northeast of Dallas) Registered: Jun 99 posted 04-29-2004 12:05 PM                        You should just be able to replace the bulb. Usually, you'll see the error rate drop noticeably with a new bulb.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 04-29-2004 01:19 PM                     "Another tid-bit...only the GE version of the EPT works" Actually Steve, you are wrong on that statement. The WIKO version of the EPT works just as well as the GE version does although the reflector is quite different. Used many of them when I was at GTS and obtained just as good of results of video level and life span. "but I would like to get away from SDDS as much as I can." Yea, but SDDS sure sounds miles better than SRD does. If you ahve 3000's SDDS should be no more problem to play back then SRD ocasional is. If you have the older SDDS units then oh well...but they can be made to work pretty darn reliably if your chain gives a hoot. Mark  |  IP: Logged Darryl Spicer Film God Posts: 3250 From: Lexington, KY, USA Registered: Dec 2000 posted 04-29-2004 02:35 PM                    We had to get some from dolby because I was having problems finding it here locally. They sent the GE type. Turns out after furthur investigation that there is a problem with the power supply or socket. The reading withour bulb was 10V but the reading with the bulb installed with a load on it was 3.8V. Dolby is sending us another power supply on a repaor/exchange. I hope this remedies our little problem we are having here. As far as the wattage of the bulb as asked in the original question it is 42Watts for future referance.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 04-29-2004 03:42 PM                     Darryl, Don't waste your money on this Dolby scam! All thats wrong is the power supply connectors are cooked. This is akin to the USL power bypass switch failing and how many bought new or replacement supplies that didn't need to. Just remove the connectors from the PCB and solder the wires directly to the board. Can't tell you how many 700 power supplies I've seen this happen to but its pretty much every one that I come in contact with. My most recent one was two weeks ago in Wyoming. I have made it a habbit of removing the crap Molex connectors and soldering the wires directly to the board for several years now. If you do yours you can chuckle with me over the available unused pins that Dolby doesn't use for the DC connections that could have alleviated this problem. If you replace it your new power supply will also eventually follow the same route down the road in a few years USL is wise and now leaves the power backup switch off all new supplies!! Mark  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 04-30-2004 06:38 PM                     Mark, I'm happily corrected on this statement. I believe it was OSRAM's EPT that simply had a different focal point so the light was not efficient with Cat. 700 set up. Apparantly, even though there is an ANSI EPT, it isn't too well standardized. Now Wiko I've had mixed results with in general. They are popular now due to cost but I've found the quality of their minature lamps to be quite questionable. I can't speak to their EPT lamp as I have never used them. Thanks for the tip. Steve  |  IP: Logged Chris Hipp Phenomenal Film Handler Posts: 1462 From: Mesquite, Tx (east of Dallas) Registered: Jul 2003 posted 04-30-2004 07:37 PM                     quote: Darryl Spicer We had to get some from dolby because I was having problems finding it here locally. They sent the GE type You can order the GE bulbs from Grainger for about $36. I guess I should have said that I want more options than just SDDS. We just got four new cp650/cat701 readers for you big houses and I have four cat700 readers and two da20's on carts. I'm also getting my DTS6D's repaired right now. I just hate having broken down equipment lying around. The DA20's are dropping out but I am pretty sure putting new bulbs in will fix that.  |  IP: Logged

All times are Central (GMT -6:00)

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.