Originally Posted by virusc
slim type CRT's are terrible as the deflection angle causes major distortions towards the edge and serious white field uniformity issues.
Deflection is the enemy of any CRT's proper geometry, however, this has been defeated decades ago with the standard 4:3 ratio. The introduction of 16:9 wide screens again cause the issue of geometry errors, prone from bad deflection, which is typically made worse with thinner tube depths. There are, however, several non-slim widescreen tubes that have proper geometry. Of course, as with any CRT, this can still be wacked out over time, use, and absolutely with abuse. It's just a caveat that anybody still using the technology has to deal with. Avoid widescreen, avoid slim, or avoid the two of them together if it bothers you enough and you'll be as reasonably well as can be expected.
Also, these types of CRT's always use variable pitch shadow mask that also causes issues at edges.
This is another side-effect of extreme deflection and thin depth tubes. It is just impossible to have a pixel the same size at an extreme horizontal end when the beam starts so close to the front of the tube.
Bottom line. All consumer and most professional CRT's are greatly inferior to any decent modern plama/LCD-whatever.
For potential geometry issues? Absolutely. Is anybody saying otherwise? I don't think so.
True broadcast 20"-29" CRT's (with much smaller visible area) are still valid. These monitors cost 20-50k. They also have very low light output and are 2-3' feet deep.
I think you would have a tough time selling those for even a fraction of 20k, nice as they are.
Anyone that still thinks that CRT's are superior to the modern digital panel is crazy unless they have to have original 480i or special native resolution (like 15khz arcade games)
You don't have to be crazy to think a CRT is "superior to the modern digital panel." You just have to have a clear notion of what you prefer. Colour accuracy, gamma, white level--and yes, proper resolution supports like 480i, or any interlacing really, means exactly that. If you need that to have the proper image that you want to view for whatever purpose, you need a CRT
. Just because a tube is prone to geometry problems does not mean it will be prone to geometry problems if the user in question does not have his head up his rear end. A well-cared for tube can be calibrated properly, last and work perfectly for an application years at a time. If you need an absolute larger screen, if you need to wall mount, if you need easy portability, if you need low power, particular connections, higher resolution progressive scan, absolute lack of EMI, easily, a "flat panel" can be "superior." Just be clear as to what is superior for your purpose. A lot of these things are not such handicaps for certain CRT use, and can be worked around. And why would you do that? Well...
For the record I own many CRT's (50+)
If you own that many CRTs then I can only hazard a guess that you have a specific purpose for them, one which they work properly for.
For consumer CRT's you can't import them anymore legally. This is due to lead and mercury import environmental laws that went into affect a few years ago. In special cases you can for military and commercial CRT's but this is few and far between.
Importing a CRT just to use yourself should not be a problem. Importing a CRT such as the ones from the factory suppliers I listed, and then trying to sell
them, is a much more dicey proposition in the USA, for the reasons you just mentioned. Good luck getting any kind of efficiency rating or safe environmental disposal ROHS qualification on a Chinese-made tube designed for third world markets, they just don't flipping care, and I doubt they will be assed to retool their production just to satisfy American standards.
Originally Posted by fatbottom
PAL has superior colour
Says who? And what's superior about it? The lack of a tint control?
and higher resolution. 480i versus 576i.
When the resolution is interlaced the numerical comparison you are trying to make is largely meaningless, and given that interlacing, the 50Hz is utter crap for a stable, pleasing picture.
NTSC stands for Never Twice The Same Colour.
Yes, when the vacuum tubes of your NTSC tube television screw up your colour and you can't use anything newer than S-Video, you sure do wish that you had a nice PAL TV from 1955... ? This is the most retarded outdated complaint imaginable. At any rate, I would rather deal with a tint control than stupidly varying speed rates of video and film that confuse broadcasters across the planet, let alone on your little island.