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Sunday, May 27, 2012

Measuring Projector Light Output

The newer JVC projectors appear to have an issue with bulb life. Some bulbs have been known to dim and or explode after a few hundred hours. I decided to get a cheap meter ($13) to measure the light output and monitor under consistent conditions as I accumulate hours. There is a test pattern in the service menu that throws a white screen with 9 circles that I use for placement of the meter sensor. Pictured is the center circle. The average of the 9 spots are 134.8 lux with 20 hours on the lamp in normal mode. Now I have a reference which to base future measurements. Normally this is a two handed operation, but I had to hold the camera too!


Thursday, May 10, 2012

Dedicated Electrical Outlets

I finally got around to wiring some dedicated outlets above the rack. I'll now have a dedicated 120v-20a duplex outlet for rack electronics, and a 240v-20a duplex outlet for my subwoofer amplifiers - Crown CE4000s. Next up I need to recalibrate, as the amplifiers now are running with their fullest gain potential, 3600 watts into 4 ohms. each. Progress!