black carbon looking things

[LOUCAT111]

Great Forum , What are the black things that on allot of wires and on the copper cones on monitors ? dumd question . Thanks

 

[resabed01]

Hi and welcome to the forum. I think what you described is the yoke of the monitor. The yoke is dark grey and cone shaped thats wrapped with copper wire. The yokes core is a magnetic ceramic and has practically no more value than steel.
I usually pull off all the copper and toss the core either in the garbage or in with the scrap steel pile depending on how my mood is that particular day.

 

[Smack]

Be safe when taking CRT's apart, you can get electric shock injury and may even cause death. Learn what not to touch.

 

[resabed01]

Good point and thanks for mentioning it. I've been working on TVs and monitors for the last 35 years so the precautions I take are ingrained into habits and I don't even think about it really.
For somebody not knowing, a CRT television or computer monitor can be a very dangerous place. The tube can hold a high voltage charge for years and the vacuum tube is dangerous in itself to handle.

 

[LOUCAT111]

Thanks , I had to ask . I am loving all the info here .

 

[oldgoldman]

plus i've seen more than one CRT implode and send leaded glass everywhere when the vacuum seal is not broken safely

 

[NoIdea]

Hmmm, guilty as charged. I was processing a number of CRT's, the hole, where the high voltage plugs into, has a wee metal seal/connection, this is where i use a nail punch and hammer to make a small hole, allowing air in and no bang bang.

Weeeell i was on the last CRT and it was the biggest(36inch) and i forgot to release the vacuume, i started cutting through the steel mounting band with the angle grinder and BANG!!

I "Always" wear safety goggles when working with CRT's, had i not that particular day, i would be writting this blind. :shock:

Deano

Edit: Those black things are nickel ferrite, they go into my scrap iron bin.

 

[g_axelsson]

I defused CRT:s by putting a flat screwdriver between the legs on the electron gun and give it a twist. It broke off one leg and let the vacuum out. :mrgreen:

/Göran

 

[gold4mike]

I think the original question from LOUCAT111 was in reference to the ferrite donuts that wires are run through and wrapped around. They're found in a lot of electronic applications and there are large, usually two or three piece, cone shaped ferrite cores in the yokes of CRT's and TV's.

I throw them in with my steel from computer cases and sell them at (lately) about $.10 per pound.

 

[LOUCAT111]

Thanks Gold4mike . You are right on . They look cool so I hoped they were worth more .I have lots of questions . yours Lou