Re: What's that black dust in monitors?

An Ioniser is generally left on continuously and attacts 'particles'.

However, this tends to be brownish, not the black stuff that appears in a monitor/TV Set.

sPoNiX

attract

I spend a lot of my life mending TVs so I see a lot. The colour of the dust is definately related to location. In an office with photocopiers it will be black, there is a bakery in our town and TVs from within that area have white dust in, a smokers house has brown horrible smelly stuff (yes I do smoke) and so on, some of them are absolute health hazards and you really wouldn't want to touch them with a barge pole.

On Mon, 22 Sep 2003 03:33:09 +0000 (UTC), snipped-for-privacy@manx.misty.com (Don Klipstein) Gave us:

Even the most powerful models are only around 6kV.

Most large CRTs are between 15kV and 30kV. Some even higher than that.

On Mon, 22 Sep 2003 03:43:08 +0000 (UTC), snipped-for-privacy@manx.misty.com (Don Klipstein) Gave us:

I don't know. I know that a dusty surface ribbed with oily hands moistens and blackens the dust.

When I score lines on a new, plastic project box for cuts to be made, I can rub the scores with my fingers, and the dirt on my hands alone will turn the scores to a black line.

Clothing colors darken upon getting moist or wet. I am certain that dust will also follow this trend. So, even dust that is not initially black could easily turn that way if ALSO moisture particles are being drawn to the surface. Neons hove nowhere near the corona levels found inside consumer monitors that have "open air" design HV components.

The military and space organizations have known about this, and have fully potted HV sources for decades. The only remaining open air stuff is that which is in transmitters, and they are fully caged.

The fact remains that it is indeed an accumulation, and NOT some kind of emission, as has been earlier put forth by the idiot that likes to attack me.

On Mon, 22 Sep 2003 03:48:56 +0000 (UTC), snipped-for-privacy@manx.misty.com (Don Klipstein) Gave us:

Oils are non conductive molecules, and are airborne. Cigarette smoke, cooking smoke... the list goes on. The surface could have anything short of a conductive material on it. VERY SIMPLE.

On Mon, 22 Sep 2003 15:53:57 +1000, MC Gave us:

The only thing more retarded than the stupid Rod Speed poster, is the stupid twit that thinks that his filter edit announcements have some meaning or purpose. You be lame, boy. You be that retard.

On Mon, 22 Sep 2003 16:44:25 +1000, "Simon Harris" Gave us:

And such a poor posture it is.

On Mon, 22 Sep 2003 06:49:14 +0000 (UTC), snipped-for-privacy@manx.misty.com (Don Klipstein) Gave us:

When I was a kid, I could climb a phone pole in five seconds flat. Up the guy wire.

OI was in TJ, Mexico a few years ago, and jumped up to grab one of those guy lines, and the damned thing had a half inch of the blackest, wettest (oil and grease), nastiest s*it on the planet on it. That place is lame, and full of cooking smoke from the street vendors.

Case closed. Moist particulate turns dry brown dust black. Pretty simple s*it.

On Mon, 22 Sep 2003 06:49:14 +0000 (UTC), snipped-for-privacy@manx.misty.com (Don Klipstein) Gave us:

In the high field area around the HV components, including the flyback xformer, the fields are so high that the dust in the field can settle on any surface the field is impressed on. Including nearby metal chassis parts. Just not as prevalent.

On Mon, 22 Sep 2003 07:01:59 GMT, Jackie Gave us:

You should have been able to glean from the posts the fact that it is a dust accumulation that is influenced by the high corona field present on anode supplies, and the CRTs they attach to.

Learn how not to top post.

On Mon, 22 Sep 2003 19:31:43 +1000, "Rod Speed" Gave us:

You're an idiot. At best.

Mine are mostly pretty transparent, very light colored.

Dark line, anyway. Not the jet black soot you get adjacent to the FBT in a monitor tho.

Yes.

Yes, but it doesnt end up jet black like the soot adjacent to the FBT in a monitor.

And that jet black soot adjacent to the FBT in a monitor isnt moist or wet anyway.

Fraid not. And while dust certainly gets darker when moist or wet, it lightens in color when it drys out again. That jet black soot adjacent to the FBT in a monitor isnt wet or moist at all, and is still jet black when completely dry when the monitor is quite warm when used in summer.

Yes, but thats so you dont end up with moist dusty arc paths.

Nothing to do with where the jet black soot adjacent to the FBT in a monitor is coming from.

And FBTs are epoxy coated themselves.

Just claiming its a fact doesnt make it a fact.

Just proclaiming that cuts no mustard.

Pity what was clearly being discussed there was 'positively charged surfaces'

In fact there is MORE soot on the metal, just because its closer to the FBT than the inside surface of the case adjacent is.

On Tue, 23 Sep 2003 05:07:33 +1000, "Rod Speed" Gave us:

Pity? Would you please grow the f*ck up, boy?

A grounded metal chassis has no charge on it. Doh!

If it is in proximity to a high strength field, however, it can accumulate dust, right along with the charged surfaces. And nobody ever said what polarity they had, except for your lame ass.

The word for today is FIELD. Learn it. Try to get out of the pit you are in, boy.

And what about tire rubber and carbon? That rubber goes somewhere...

Thomas

Very common in and near Philadelphia!

The brown color is mainly from nitrogen dioxide, which is usually the

- Don Klipstein ( snipped-for-privacy@misty.com)

I've seen this black 'stuff' on monitors in the Pacific islands - there sure as hell weren't enough diesel vehicles (or tyres, for that matter!) to do this.

Ken

Actually, it's Tooth-fairy droppings. Not many people know this, because most people think tooth-fairies are large. This is easy to believe if you think that each tooth is removed by only one tooth-fairy, but in fact it takes a multitude of tiny tooth-fairies to take away each tooth and a similar multitude to replace it with cash. Before computers, the tooth-fairies used to live in the fireplace, ever vigilant for gap-toothed ankle-biters, and their droppings coated the inside of chimneys. Now they prefer to live in the warm seclusion of monitors. By the way, it will be pointless to peer into the monitor looking for the fairies: just as no-one has ever seen tooth-fairies actually removing a tooth, so no-one will ever see them inside the monitor. Trust me.

Tried web searching... Looks like you're right on that one, and cobwebs made solely of dust was something that I heard incorrectly before. My cobwebs are definitely at least part dust and are usually very dark in color, much darker than most of the dust in my home.

- Don Klipstein ( snipped-for-privacy@misty.com)