CRT Screens and Magnets

Which means? they deflect the cathode rays, which make the picture? Why does it leave a discolouration?

Cheers thanks for answering my question

Excellent answer frankd20. I would like to add some to your post. "its a wonder they don't get screwed up from the earth's magnetic fields." Actually they do. If you have a small - say 13" color TV with a CRT try turning it on its side while it is on and notice how horribly the color screws up. Then return it to its original position and it should look fine. Technology has improved over the years so that the earths magnetic field is not as big a problem as it once was. For instance, The first color sets in the states required a service call every time you oriented the TV. Such as moving it from a North wall to an East wall. Degaussing and purity Adjustments were typically done. (as a side note: service calls were $3 - $6) The purity magnets are now factory set and don't require regular attention. An automatic degausser is included which demagnitizes the shadow mask each time the set is turned on (From a cold start). It won't work if you turn it off and right back on. Hope this helps

lovely boy.

Do you mean flat screen CRTs do not need a shadow mask?

Or are you referring to non CRT technologies?

non-CRT, of course

Sometimes the obvious is masked by generalisations.

indeed, sometimes I forget that the audience is general

Any color crt has to have a mask to allow the electron beam from only one of the 3 guns to hit the proper color phosphor. Even Sony trinitrons (one gun) crt's have them.

Yes, I was just making a point on usage of flat screen as a definition of non CRT technologies, witch may lead to misunderstanding of the fundamentals being explained.

GA for the first fully correct answer when reading down from the top!!!

Our TV gets this colour screwed up in one room and facing a particular direction, say south. But keeping in another room facing the same direction, south, doesn't get affected.

Could this be because of the magnetic field build up and concentrated at some favourable places more than other due to usage of iron rods in RCC? If yes, is this magnetic field build up on such iron rods in RCC is due to earth magnet or induced from power wiring crisscrossing the building?

Magnetic field has energy is a public knowledge, everyone will know it.

Well, Whats your wonderful theory in face of Teslas box? put out.

OH NO!!!

what?

One of my friends once came to me that he had trouble with the TV, discoloring of the screen, i just moved his big ass doubly surround speaker a little away from the TV and presto the TV screen was OK again.

I also had a big screen TV with Boxes built into it but the maker magnetic shielding was somewhat weak and one side had a greenish hue to it

yesyen maybe that is part of your problem?

I do not know how much I'm off the topic. I was just curious to know the impact of being among the strong magnetic field?

Earth magnet, fine, is all over, but should be stronger near poles than around middle/equator.

Are there any recorded facts about the influence of this field on human?

Is sleeping (that is where we spend most of life) east-west better than north-south or the other way?

And living in concrete buildings with tons of steel surrounded by electrical wiring and electromagnetic gadgets, subject us to greater flex of the induced magnetism. Was there any study or finding on this?

On this regards only I was saying some corners in buildings like ours with concrete roofs/floors (RCC) are notorious for TV color distortion. Is this an indication of stronger magnetic flex concentration?

Epke, no additional speakers other than the built-in, still looses the color in some corners/directions.