k f . e
Argggg... no tube, no glass, no filament, no socket, no HV, no warm- up, no static, no heat (good for winter), no cracking crak sound, no Hi-Fi (speaker), no H-Hold, no V-hold, no sliding door, no leg, no veneer, no linen, no etc....
But at least there's connector to plug in the antenna ?
On a sunny day (Tue, 18 Dec 2012 08:56:50 -0800 (PST)) it happened halong wrote in :
No wide viewing angle, no color fidelity, no convergence / registration errors, no depth, no magnetic sensitivity north south changes, no degaussing at startup, no imploded tubes, no more cheap fish tanks.
Yes.
Which would have made the tube unsuitable for rebuilding by most companies. The machine to do monochrome phospers cost about three times what the rebuilding equipment cost, so it was rarely done. They just laughed when I asked what it cost for the machines needed to do phospor replacement for color CRTs.
What do you mean, no HV? How do you think they power the CCFL tubes?
No big bux No tiny screens No X-Rays No hernia
Why?
ubes?
ok...
no high KV, no H+ boost, no flyback ...
anyway I feel sorry for this folk, who felt in love with an old TV set
On a sunny day (Tue, 18 Dec 2012 13:00:22 -0500) it happened snipped-for-privacy@att.bizzz wrote in :
errors,
First thing little kids ask is 'Why?'. Any answer will do, but later on, when they grow up, with those answers and the system hardwired into their brain, they are already dead, blind, and only good for reproduction of the species. So I will let you figure it your self, justto help humanity.
So, the ~2 KV at enough current to kill you is OK? They still use a ferrite HV transformer to step up the voltage.
errors,
OTOH, some aren't wired at all.
k f . e
It's not April 1 yet. Nobody makes picture tubes anymore. BTW, where do you get the analog signal for your old TV? You do know analog TV was turned off in 2009. If you're actually serious, you probably broke it when you opened it and no one will take it back.
Merry Christmas
G²
Long obsolete. No CCFL's any more.
So, they aren't using them in anything, anymore?
I'm watching it right now. I have about 30 channels of Analog TV availible.
V
do you see Santa Claus shopping a flat screen TV ?
Why would I need another TV? I have a 10" flat screen about three feet from me, right now. I have a 7" battery powered NTSC/digital flat screen portable, too.
I have about 12 CRT TVs and just gave away two small color portables.
BTW, I don't see Santa Claus. What are you drinking?
I've seen them taken down to air with a very small drilled hole ( a few mils carbide drill).
Good rebuilders pumped them down in an oven, both to stress-relieve the glass, and help degassing.
There was also a process called "spot knocking", involving about 30kV, applied between the final anode and all other electrodes. Supposed to remove potential flashover nuclei. Done in a lead-lined box.
a shop
I believe once the inner surface has been cleaned, that a slurry of phosphor is poured in and allowed to settle, then a rinse and repeat for each color. Masks like what is used in PCB making are used for de dots.
AIUI, the actual shadowmask with which the tube would operate was used to mask three separate exposures, using UV point sources located exactly where the respective guns would be. All done before the faceplate was attached to the flare. All inaccuracies in manufacture of faceplate and mask consequently accounted for.
Shadowmasks were accurately located on pegs molded into the faceplate.
The process would have more than filled the space I had avaialible for the equipment, if I wanted enough space around each machine to maintain them.
Some fire extinguishers are pressure tested in a big tank of water. No big drama if one bursts.
(I used to be in the fire protection biz, for a while. Margins are low.)
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