I hope I never have to make a switch from CRT TV's to modern flat panel TV's for classic gaming.
As far as I understand, CRTs have a finite lifespan, due to the finite supply of electrons in the cathode.
You'll be well served by watching these videos:
Here's part 1 (each part is about 2 hours)
If you are concerned, watch your local craigs list, there are Sony CRTs for free almost every single day, get 2 more and put them in storage for backup. The problem is the part are not made to last forever, capacitors wear out , phosphorus gets consumed and you may find in the next few years of your life, this hobby will become much less important to you..
Planar PD8150 with DC4 DMD paired with a Dalite HP 2.8 110"
Some cities have e-recycling too. Mine has no restrictions but I have to bring them to their drop-off center.
you will probably have better luck finding a working used one in the future than finding a replacement CRT .
Those trinitron Tube replacements cost more than a new set when you could still get a tube I don't think consumer trinitrons were ever available as rebuilt.
Trinitrons and Wegas will probably be popping up on craigslist for the next 20 yrs they must have made millions of those sets
by then you will want OLED anyway. I don't think any consumer CRT are being rebuilt anymore mostly just specialized medical/military/industrial
and aviation parts and most of those are being replaced by panels now anyway
I'm certainly no expert on this subject matter but I'm thinking:
1) A problem in the circuitry and/or color gun may make it appear to be a phosphor problem.
2) The phosphors may very well degrade uniformly. Each particular color set is made of the same material and deposited uniformly at the same time using the same process, and during use are scanned continuously; but one color set will degrade at a different rate than another color set.
unfortunately, randy fromm was recently upgraded to google plus and lost all his videos. I contacted him and he's working on getting them back online!
The cathode is the part of the electron gun that has a coating of a material, and when the cathode is heated, it releases electrons. But these electrons aren't recycled.
CUTOFF RELATED FAILURES
In order to understand the cutoff test, let's take a closer look at the way the cathode works. The cathode is the source of the electron beam. It is coated with a material (such as barium or thorium) which gives off large numbers of electrons when it is heated by a filament. Believe it or not. there is a finite amount of this electron emitting material and it gets used up or "stripped" after years of extended use. Once the barium is used up, the picture tube cannot be completely restored.
My Sony Trinitron 27" TV I bought from Lowes Hardware store in 1994 and it is still in mint condition - except for the speaker system which works OK and all but I think it sounds bad to me now because of my awesome sound system on my PC. I think this TV will last forever but if not forever at least another 10 years.
Pretty reliable sets all in all at least for me.
I have a Sammie Plasma and Toshina and LG LED/LCD's now all 2012-2013 models so time will tell on those.
I'm going to get another LED/LCD set next month maybe Sony,Toshiba, or Samsung. IMO they seem to have better pictures than most of the other brands
My Toshiba is much better than my LG IMO.