Hi,

I am getting weird readings doing my 6500K for my CRT projector (Marquee 9500LC Ultra)

Setup:

- HCFR software.
- DTP-94 in "None" mode
- PJ Ceiling mounted
- DTP-94 (tripod mounted) pointing at the projector (green gun)

What happens is that I am getting very high measurements on the Blue channel (or very low on the RED, I don't know) and as a result, if I balance them (drive and g2) for good 6500K greyscale tracking I get very reddish whites.

Any ideas what may be going on? I have also tried the Spyder2, and the Eye2one LT with very similar results.

Since you've tried 3 different sensors, I'd assume it's not a problem of incorrect calibration of the sensor.

This probably isn't it either, since you've tried different setups, but: depending on how directional the sensor is, you can get seriously skewed temp results if the sensor is aimed a bit more at the blue side or the red side. It's best to aim the sensor at the screen so you don't have that problem, and you also take any color-shift from the screen (hopefully none) into account.

Only trick is, you have to make sure the sensor doesn't "see" its own shadow. This is especially important with a CRT, since you'll have a multi-colored shadow and I imagine that would mess up a color-temp measurement.

zoyd recommended adding a tube, painted black inside, to the Spyder2 sensor. That way everything the sensor sees is black except a small area at the end, and you aim it so that small area doesn't include the shadow.