Talk:Cathode-ray tube

Cathode-ray tube was a good articles nominee, but did not meet the good article criteria at the time. There may be suggestions below for improving the article. Once these issues have been addressed, the article can be renominated. Editors may also seek a reassessment of the decision if they believe there was a mistake.

Article milestones
Date	Process	Result
June 12, 2007	Good article nominee	Not listed

Electronics High‑importance

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Older Comments

since someones mentioned not messing with a CRT, should it be mentioned that one should short the large capacitors to avoid a shock

I've just added:

These high voltages can persist long after the device containg the CRT has been switched off.

In general, the untrained shouldn't be opening the box in the first place, and providing warnings is better than providing "how-to" details: where do you stop?

To do:

phosphor metamerism
color gamut

The line "CRT is a triode. More complex CRTs contain greater numbers of electrodes. " was deleted. Primarily, this makes no sense logically, and also, triodes were mentioned later.

Sounds good to me, welcome to Wikipedia. -- Tim Starling 07:47, Jan 5, 2004 (UTC)

CRT illustrations made especially for Wikipedia

Hi - danish wikipedian here.
For some snazzy illustrations, check out the danish article (language: "Dansk") on the subject: I just rendered some "cut-away" images of various CRTs...

User:Peo on danish Wikipedia

... and now I've moved large versions of those illustrations onto Commons. See:

User:Peo, from danish Wikipedia - again!

How many joules are in the capacitors? lysdexia 22:18, 19 Oct 2004 (UTC)

"...children should even be encouraged to do this so that they may see the immediate and dramatic effect of a magnetic field on moving charged particles, provided they are informed to never do the same with a color tube."

TEACHER: So remember, kids, never put a magnet near your TV or you'll mess up the screen.

JOHNNY (THINKS): Gee, that's great! If I mess up our crappy old TV Dad'll have to get a new one! Lee M 01:59, 2 Dec 2004 (UTC)

---

I wonder if *THAT* is what happened to my crappy old 13" TV? :)

Seriously, the Exploratorium has a color TV and a huge magnet set up for just this sort of playing around.

Meanwhile, [[User::lysdexia]] asks about how many joules are stored. Well, Joules = KV^2 * uF, so lets take a SWAG and call the CRT 0.01 uF. Meanwhile, the charge on the CRT can be 25 to 30 KV on a modern color CRT so we can calculate 6.25 to 9.00 Joules based on our SWAG about the capacitance. Having been on the receiving end of a 17KV discharge from an old B/W CRT (never grab the 1B3GT by the bottom; you might contact the HT pins!), I say that sounds like it's in the right ballpark. The shock wasn't too bad, but I really hurt my elbow when it smashed into the wall behind the TV set.

Atlant

CRT TVs were popular until the late 2000s Beyond the United States and the last commercials for new CRT TV models were between 2007 and 2008.

CRT TVs known as tube TVs were popular around the world in general until the end of the 2000s because until the end of the 2000s in several countries CRT TVs were still selling a lot in stores because there was still great demand. They only began to be replaced slowly since the mid-2000s but were only completely replaced in the early 2010s when they lost popularity worldwide in general. Eusouwikipede2001 (talk) 18:48, 29 May 2024 (UTC)[reply]

Cathode current seems off

"...while at the same time current is supplied to the cathode; typically anywhere from 140 mA at 1.5 V to 600 mA at 6.3 V."

Implies there's ~100s of mA applied to the cathode. The source this sentence cites implies the same. This is certainly the the heater voltage/current (e.g. 5CP1 datasheet [1]), however. Is it possible to rephrase this? MyIpIsLocalhost (talk) 03:32, 23 December 2024 (UTC)[reply]

Wiki Education assignment: Technical and Professional Editing

This article is currently the subject of a Wiki Education Foundation-supported course assignment, between 13 January 2025 and 6 May 2025. Further details are available on the course page. Student editor(s): KamileBidan (article contribs).

— Assignment last updated by Dr.ozkul (talk) 21:28, 11 February 2025 (UTC)[reply]