Originally Posted by ssj2
Additionally, the "auto convergence" nearly all newer CRT based RPTVs can do a very respectable job on convergence.
I'd beg to differ on that one. Even Vidikron told me on the phone years ago about their $50K camera-equipped ceiling pj, that their CAMERA-EQUIPPED auto-convergence system only got you 80% there. The rest had to be done by an onlocation calibrator. Which I of course did while there.
The only way to make an auto-convergence system - Magic Focus (Hit), Touch Focus (Tosh) and Flash Focus (Sony) - do any sort of efficacious job is to sit way far back from the display from then on, effective reducing the size of what you are trying to watch, immensely. It's really sloppy compared to tightly stitched manual convergence, done from about 2'-3' away from your set.
Feel free to come over to my place and see what a high-precision manually stitched convergence will look like, watched at 8' away from my 65" screen. Or go to my website and go into Screenshots and click on/blow up the CSI image and study the detail.
That level of detail is NOT available via auto-convergence!
However, I do have to take issue with the statement that CRTs can easily resolve 1080i. This is true only for those with 9" tubes. With 8" & especially 7" sets you might be displaying the 1080i signal, but you're not getting 1080 lines of resolution.
Nothing out there presently delivers full 1920 horizontal resolution except the new HD DVD players. As I said earlier, according to Joe kane OTA, the least compressed out there, only delivers 1400. 7" guns have no problem with 1400.
It's not the size that matters here. It's the level of the technology. A CRT is a CRT. A 5" CRT can still resolve 1080i. You just can't magnify it enough, optically, for big screen use. And who's going to supply a 5" display with the extreme electronics it takes to do 1080i? Maybe the military, for special applications, but you won't find it in consumer grade stuff.
You'd still need triple gun technology, tho, because monochromatic guns are the only way to truly get the highest of res necessary for projected HD. Triple chromatic guns, like regular 19" single screen SD CRT units, have all 3 colors on them, spaced out and requiring a shadow mask to differentiate them. As such much of the potential is masked, and always has been.
Not so with monochromatic CRTs. What you see is what you get, directly and with no shadow mask in the way.