quote: Robert D. LaValley

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I dont have a meter to check airflow but it seems to be pulling air pretty good becuase the air vein stays up and when I put a hand near the exaust pipe it feels like its moving air pretty good.

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quote: Aaron Mehocic

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On the other hand, I have noticed problems with sound systems (and other circuit-based equipment) when it gets that hot. Excessive heat causes DTS units to drop out of digital. Also the screens on the CP500 becomes faint and has a slight flicker to it.

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..better get an auxillary fan/cooling/exhaust system blowing on these units to keep their temperatures under control as well..just don't let them perculate in the heated atmosphere..you'll kill them very quickly due to the excessive heat, for electronic items are so very sensitive to heat as well..

-Monte
 

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Posted by Mark J. Marshall (Member # 1409) on 04-02-2006, 10:36 AM:
 
All the equipment prefers it to be cool. Set the AC at 68, and all the equipment will thank you. If the booth operators are cold, give them a jacket.
 

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Posted by Louis Bornwasser (Member # 3063) on 04-02-2006, 10:56 AM:
 
I think the "Florida" issue is excessive heat and humidity. Besides the personal discomfort; it would surely be cheaper to TAKE CARE OF THE EQUIPMENT by having suitable cooling and therefore reduction of humidity. (I don't think there are any owners who care about people.) Rust, bulb life, and all kinds of circuitry problems are stopped instantly by proper temperature and humidity control. Louis
 

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Posted by John Pytlak (Member # 331) on 04-03-2006, 09:00 AM:
 
For proper film handling, control of relative humidity is more important than temperature. Ideally, film handling and projection areas should be maintained near 50% relative humidity. At very low humidities (below about 30% RH), the film curl becomes excessive, and static issues are more likely. In very damp conditions (above about 70% relative humidity), the film emulsion becomes softer, stickier, easier to abrade, and more prone to buildup of hardened gelatin in the hot projector gate. Really damp conditions can be an issue for high voltage electronics, especially xenon ignitors. As Louis mentioned, rust and corrosion are more problematic in damp conditions.

Temperature is more critical for operator comfort, and for proper cooling of electronic equipment. Remember that winter heating can significantly reduce the relative humidity below the desired range, so humidification may be needed to keep the relative humidity near the aim of 50%RH. In tropical climates, air conditioning or dehumidification should be used to lower the relative humidity to near 50% RH.

Every projection room should have accurate humidity gauges to be sure the relative humidity is near 50 percent RH. Accurate digital gauges are available for about $20 USD.
 

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Posted by Matt Fields (Member # 3211) on 04-03-2006, 09:31 AM:
 
I was having problems with the bulbs striking last summer...and then I bought a dehumidifier and the problems went away.
 

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Posted by Phil Blake (Member # 2012) on 04-03-2006, 09:32 AM:
 
quote Ron Curran

quote: Ron Curran

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some of our operators worked in their underwear in Australia's summers.

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yep! I was one of them ,Carbon arcs DC Motor generators and no AC it got damn hot in there , i remember gasping at the open ports while dodging incoming bugs the size of golf balls.
 

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Posted by John T. Hendrickson, Jr (Member # 849) on 04-03-2006, 04:54 PM:
 
Monte Hall said:

"When I was working in the drive-in's, Summer booth temperaturs where quite high due to those two Ashcrafts pumping out the heat and the booth wasn't insulated".

Amen to that Monte! Here in NJ you got those hot nights where you left the screen doors open and had a fan to blow the air across the booth. Usually you sat outside (if the bugs weren't too bad) until changeover time. Then, thread, check the carbons again and make a bee-line for the outside.

Fortunately, I only worked relief at the drive-ins. Much perferred the hardtops in the summer.
 

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Posted by Monte L Fullmer (Member # 2797) on 04-03-2006, 11:53 PM:
 

quote: John T. Hendrickson, Jr

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"Monte Hall"

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..one of my nicknames...lol ..

..and you talk about heat is when you work in a drive-in with Strong Futura II's with those big 13.6mm rotators carbons blasting light and the heat through a pair of Motiographs "AA's" to shoot light on a 100x60 foot screen 150 feet away... Damn..that booth was HOT during the summer..let along having 14 Motiograph tube amplifiers for the speakers pumping out the heat as well, fans everywhere, drinking ice water, wiping our selves down with wet cloths..et.al. ..and that booth didn't have an front outside exit to get away between changeovers. You had to pass though the concession area to get to the booth..Thus, you were stuck either in the booth or in the concession area (which wasn't the best idea since you might just miss the reel end alarm at times) but, you know, that was still fun.

-Monte
 

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Posted by Gordon McLeod (Member # 33) on 04-04-2006, 09:56 AM:
 
Most electronic equipment doesn't like an ambient temp much above 90f
 

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Posted by Sam D. Chavez (Member # 1841) on 04-04-2006, 10:51 AM:
 
Nostalgia will get you everywhere. The girls were prettier, the burgers were tastier, etc.

I too remember my DI days fondly, my dog chasing the seagulls when I did the field, the fog rolling in late at night before the film ended, the exit guard bringing me donuts at midnight, and most of all running the Clint Eastwood trilogy until 4:00 AM while my ex wife was schtuping(sp) someone at home.

Just Kidding, maybe!
 

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Posted by John T. Hendrickson, Jr (Member # 849) on 04-04-2006, 06:25 PM:
 
Point well taken Monte. Obviously I had a deal on my mind last night
 

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Posted by Frank Dubrois (Member # 3042) on 04-09-2006, 07:08 PM:
 
If I sweat, then its too hot. Usually no one cares.
 

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Posted by Floyd Justin Newton (Member # 1316) on 04-10-2006, 06:03 PM:
 
Frank--

When I was in the booth with a pair of JJs W/a pair of Ashcraft
Super Cinex pumping and humping on 190 Amps, we had 5 tons of
refrigeration that kept the booth at a toasty 70 degrees. It
was kept at that temperature year round, and we had no problems
with any of the equipment. Everything just hummed along.
 

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Posted by Frank Dubrois (Member # 3042) on 04-10-2006, 11:32 PM:
 
70 degrees would be a dream!! its always around 85...until summer hits..then its closer to 88. I sweat...but no one cares
 

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Posted by Monte L Fullmer (Member # 2797) on 04-11-2006, 12:15 AM:
 
Hmmmm... Ashcraft "Super Cinex" - they DO pump out quite the heat, especially running at 190amps...Muy Calente! ...that would have been a hot booth without any form of A/C .. and a massive 'sweathouse' . Monte
 

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Posted by Jason Burroughs (Member # 68) on 04-12-2006, 11:58 AM:
 
Heating conditions like those listed here, are a PRIME reason that the exhibition industry is no where near ready for the mass roll out of digital cinema.

Most theaters were designed with no consideration to power redundancy and conditioning and very little consideration to the environmental conditions of the room.

Some theaters, especially those in smaller chains, that even if they are able to afford the migration to digital, will not be able to afford, or even know about the special considerations to protect their investments.

The digital equipment will be much more sensitive to temperature and humidity that equipment that currently exists in most projection booths. Even the digital audio equipment has essentially been hardened somewhat to be able to live in the average projection booth.

I honestly don't see the average theater retro fitting their facilities to properly house this equipment, and instead performing a 1 for 1 swap and leaving it at that and PRESTO they have digital. However they will be plagued with outages, and high repair costs due to their short sightedness.
 

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