John Mears dot Co dot UK

Where 2 wrongs don't make a right, but 3 lefts do.


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Sony VPH-1271QM CRT SuperData EX Multi scan Projector.

This is my Sony VPH-1271QM CRT SuperData EX Multiscan Projector.

Here are some photos of it.

I use this projector with a Promax 120 inch 4:3 ratio fixed frame matte white screen with a gain of 1.2

CRT projectors are the ultimate in home cinema


3-gun RGB CRT (Cathode Ray Tube) projectors are known for creating a more "film-like" or "cinematic" image often lacking on modern imager types like LCD and DLP, and for having a more 3-dimensional feeling of depth as compared to the flat, artificial image of many non-CRT projectors.

CRT projectors deliver excellent black level performance, which has long been a weak area for almost any lamp driven design (LCD, DLP, DILA, SXRD and the rest). Deep, true black levels are crucial for overall image quality and contrast ratio. Not surprisingly, even "low end" CRT projectors from the early 1980s still offer higher contrast ratios than some of the latest super-expensive LCD / DLP models.

Unlike every other consumer display technology available (LCD, DLP, plasma, etc.), a 3-gun CRT projector does not use a pixel structure to produce its image, thus avoiding many pixel-related image defects other projector or display types suffer from. Artifacts such as "screen door effect" on LCD projectors or the dreaded "rainbow effect" on DLP projectors simply don't exist on a CRT projector.

The colour fill rate on a properly setup CRT projector is also higher since there are no pixels, so there are no gaps between the pixels, just a smooth, solid image no matter how close you get. Most displays not only use pixels but also sub-divide each pixel into red / green / blue, which means that each primary colour is really only covering less than 1/3 of the screen surface. A properly setup 3-gun CRT is the only display that can paint all three colours comprising the image across the entire screen surface.

(DLP projectors are a slight exception. They alternate projecting red / green / blue very rapidly, and thus are able to cover closer to 100% area with each colour, but not at the same time. Each colour is shown less than 1/3 of the time. This trades one limitation for another and can create a "rainbow effect" which is often even more objectionable for folks who notice it.)

Newer professional DLP projectors use 4 DLP chips known as RGBK, this results in better contrast ratio and no rainbow effect as each DLP chip has a perminant colour filter (not a spinning colour wheel).

CRT is a mature technology with decades of development and refinement. Despite the hype, many of the latest digital projectors up to 20,000 and beyond still can't quite match the combination of resolution, black level, contrast ratio and fill rate that CRT can provide, which is why CRT remains the choice for many knowledgeable home theater enthusiasts. But, be aware that this is serious, professional grade video equipment. It is larger, heavier and more complex to setup than a typical LCD / DLP unit. It may take you a few hours or even days to get use to the set up process but it will be worth it!

The pictures shown of the projected video image are a bit crap as firstly the image ratio is incorrect (as it was only a quick rought setup) and my digital phone camera is old, it picks up the vertical scan frequency and results in camera putting black lines over the image )o:

Copyright © 2011
All images remain property of John Mears.



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