|
|
 
|
|
Author
|
Topic: 5K Bulbs - Different pin size frustration
|
Dan Reiter
Film Handler
Posts: 74
From: Easton PA
Registered: Jul 2002
|
posted 11-13-2002 03:45 PM
Has anyone else out there been frustrated by the different 5K bulbs out there? The Osram is one design, and most others follow the 4K architecture. The result is different Negative pin diameters, bulb lengths, and arc locations. As a manufacturer and parts distributor, it sometimes causes extra problems if the manufacturer of the bulb is not specified when ordering a bulb adapter.Also, why just the 5K? Just curious,
Dan ------------------
| IP: Logged
|
|
Steve Guttag
We forgot the crackers Gromit!!!
Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
|
posted 11-13-2002 04:48 PM
Certain lamps inititate the package size. For instance, the 1600HS initiated the size of the 1600, 1000 and 700HS...The 2500HS originated its size and the 2000HS and 3000HS conform. The 3000HW has always had a larger pin than the 4000HS. When the 7000 watt lamp came out, the 7KW conformed to the 4000HS standards...most lamp manufacturers have filled the inbetween sizes based on that standard...that is the 5000HS and 6000HS (if the manufacturer supports them) have the same pin size though not all use the same ferrule diameters. Perk and Elmer (ORC) have always used HUGE ferrules. OSRAM, I guess, took the opportunity to go with a larger pin when they made the 5KW. Christie is a least consistant...they use an HTP lamp with the same threaded pin on all sizes! Steve ------------------
"Old projectionists never die, they just changeover!"
| IP: Logged
|
|
|
|
|
|
|
|
|
|
Don Sneed
Master Film Handler
Posts: 451
From: Texas City, TX, USA
Registered: Aug 2001
|
posted 11-16-2002 09:10 AM
I can relate to this topic, I just finish installing a new 18-screen theatre which had two screens using 5K Osram bulb in a Strong console, the rear connection had a 18mm connector on the bulb, upon installing I could not get a focus, found out the rear collet was too short, called Strong, a new collet was order, new one came in the same way, I was told this was the only one Strong make for that 5K lamp.. I measure from the collet connection to the bulb's focal point & found I needed 3/4" longer the standard collet....When Strong's tech came out to aligned the consoles, saw the problem & made the new collet on site to fit...all was good now, but the bulbs had a problem with the metal to the glass was very loose, we order new bulbs to replace.....GUESS WHAT ??? The new bulbs are now 3/4" too long now !!! The bulbs are Osram 5000 W/H OFR.....What is Osram smoking, the same bulb numbers but some is 3/4 " too short or too long....So does mean the theatre may have to keep changing the collets each time they change a 5K bulb....Come on Osram put down the pipe down & keep the bulbs the same size !!!!
| IP: Logged
|
|
Pat Moore
Master Film Handler
Posts: 363
Registered: Mar 2000
|
posted 11-16-2002 10:47 AM
Hi Don; I heard about this, of course. Sorry about that but we share your frustration. Stuff like this makes the "standard" idea far more appealing.We can all understand why there needs to be physical differences between different wattages, and why there might be two designs for the same wattage, and even manufacturers preferring threaded ends or clamped pins for the mounting and connections. But how many versions and permutations do we need? Our internal lamp adapter chart in the office is a full 8 x 14 sheet, and based on your encounters it's about to change -- yet AGAIN! There are also 5kW lamps out there with 8mm pins, and their focus point is probably different as well. Pat
| IP: Logged
|
|
|
|
|
|
|
|
All times are Central (GMT -6:00)
|
|
Powered by Infopop Corporation
UBB.classicTM
6.3.1.2
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.
|
Home
Printer-friendly view of this topic