| Author | Message | ||
     Anonymous |
I have an old computer monitor and I am wondering if I can open the tube to see what componets are inside. Is the gas (or is it a vaccuim?) inside toxic? | ||
| Simon Quellen Field (Sfield) |
Don't mess with it. The implosion that results when the vacuum is broken will send glass shards into bystanders at some distance. The materials inside contain toxic phosphors and heavy metals, none of which you want in your bloodstream on the way to the hospital. The technology is over 100 years old, and there are no secrets there. It is very easy to look up "how crt tubes work" on Google or at the library. You will learn quite a lot more that way than by blinding yourself with glass shards. Once you have learned how they work, then you can decide if there is more you need to know, and find a safe way to find out. Ask a local TV repair shop if they have a tube that has already lost its vacuum. Sometimes they have cutaway demos you can look at, where a tube has been sliced down the middle with a bandsaw. | ||
| Ferny |
I really really suggest you do not try to open the monitor CRT. long ago I had a tv in my bedroom and my brother triped over the wire and knocked it down the CRT broke in a cloud of phosphor. To clean it up we had to wear a dust mask to avoid breating it. There is nothing inside the CRT. It is just a big glass tube coated with phosphor on the front and has the electron gun i the back. Then the back of the tube coated with windings to guide the beam across the screen. There is no secret like Simon Quellen Field (Sfield) said there is no secret there is nothing special so dont do it. It would be dumb to endanger your life to see that. | ||
| Anonymous |
I'm pretty sure that somewhere on www.howstuffworks.com, they show you what would happen if you were to fire a gun at your computer- you could quench your curiousity there. | ||
| Isaiah Ware Unregistered guest |
I would reccomend that you not go to far into one. You can open the plastic that makes up the outer case if you want but even doing this is dangerous because of the high power of the devices, i wouldn't reccomend it. DONT GO ANYWHERE NEAR OPENING OR TAMPERING WITH THE GLASS TUBE. | ||
| KEVIN Unregistered guest Posted From: 195.29.73.160 |
GO OPEN IT . IT IS NOT DANGEROUS THEY ARE LIE TO You!!! | ||
| Simon Quellen Field (Sfield) Senior Member Username: Sfield Post Number: 620 Registered: 12-2004 |
Kevin thinks it is funny trying to get you killed. The large high voltage capacitors in a television can be deadly, even when the TV is unplugged. The glass tube can implode if dropped or hit with a screwdriver, sending glass flying at dangerous speeds. | ||
| KEVIN Unregistered guest Posted From: 195.29.65.87 |
SIMON IS ONE BIG LAIR!!!! | ||
| Marat Orazov (Marat_o) Member Username: Marat_o Post Number: 18 Registered: 6-2005 |
Kevin I would suggest you not to post about things that you know nil about. And how dare you call Simon a liar, not that you even know how to spell the word... | ||
| Simon Quellen Field (Sfield) Senior Member Username: Sfield Post Number: 625 Registered: 12-2004 |
The high voltage section of a television is usually protected by a metal cage, so that someone working on the other sections of the television won't accidentally touch one of the 6,000 volt capacitors, which can retain energy even after the set has been unplugged. You might try a Google search for "Voltage of a Television Picture Tube" and see what you get. Another search you might try is "implosion picture tube", or "implosion television tube". So we have a bunch of people agreeing that it is dangerous to fool around with high voltage and television picture tubes, and we have Kevin telling you to go ahead and do it. I suggest you have Kevin send you an opened one. That will solve one of the two problems. | ||
| Marat Orazov (Marat_o) Member Username: Marat_o Post Number: 19 Registered: 6-2005 |
HE HE Good one Simon. | ||
| KEVIN Unregistered guest Posted From: 195.29.67.170 |
HA HA HA HA HA HA HA HA HA HA HA HA HA HA HE HE HE HE HE HE...!!!!!!!!!!!!!!!!!!!!! | ||
| KEVIN Unregistered guest Posted From: 195.29.68.160 |
SHOCK FROM THE HIGH VOLTAGE CAPCITOR WHEN TV IS UNPLUGED IS LIKE THE JOLT FROM THE DOORKNOB AFTER SCUFFING YOUR FEET ON THE CARPET. THER IS NO TOXIC SUBSTANCE THERE. IMPLOSION OF TELEVISION TUBE IS LIKE IMPLOSION OF THE LIGHT BULB. | ||
| Simon Quellen Field (Sfield) Senior Member Username: Sfield Post Number: 634 Registered: 12-2004 |
Incorrect on both counts. It is easy to test both ideas. Charge a 6,000 volt 0.022 microfarad capacitor to 6,000 volts. Now touch put your left hand on one terminal and your right hand on the other, so the current goes through your heart. Do this in your doctor's office so he can test the defibrillator. The television tube is like a very big light bulb. That's like saying a stick of dynamite is like a big firecracker. I have been in the same room when someone dropped a computer monitor. It makes a very loud bang, and we were picking glass shards out of his legs for the better part of an afternoon, and his denim jeans were ruined. If he had been looking into it as he was deliberately breaking it, he would probably no longer be able to see. The energy available at your fingertip when you touch the doorknob is pretty small, because it is stored in the capacitance of you body, and you don't have a lot of skin surface area to store electricity in, and you are fairly high resistance. The human body capacitance to ground is about 150 picofarads, and the resistance is a about ten thousand ohms at the fingertip, and only 500 ohms for a metal object held in the hand. Thus the capacitor has 150 times the capacitance, and thousands of times less resistance than the fingertip on the doorknob. The thing I am having a hard time figuring out is why you want kids to play around inside television sets in the first place. Would you invite a kid over to your house to try it, so that you were financially and criminally responsible for what happened? Could you live with yourself if some kid killed himself following your advice? Could you do the time? Don't be irresponsible. Lastly, the use of all capitals is the online equivalent of shouting. Don't shout. Don't call people names. Be respectful. Use humor to defuse conflict. This is called netiquet. It helps people respect you. | ||
| Marat Orazov (Marat_o) Intermediate Member Username: Marat_o Post Number: 29 Registered: 6-2005 |
Bravo! And you forgot to mention the "THER IS NO TOXIC SUBSTANCE THERE." http://www.ban.org/ban_news/garbage_in.html for the above link do a search for "toxic" also see this very very helpful site: http://www.tpub.com/content/fc/14098/css/14098_56.htm Oh and by the way, the glass of a Cathode-Ray Tube(CRT) has lead in it to reduce the amount of X-rays emited, thus when there is an imlosion all that lead in the glass gets dumped into the environment. | ||
| KEVIN Unregistered guest Posted From: 195.29.68.181 |
WHO IS THAT STUPID TO DO IT EVEN SEVERAL PEOPLE SAID HIM THAT IS DANGEROUS AND ONLY ONE THAT IS SAFE??? I HAVE JUST JOKING WITH YOU SIMON. | ||
| KEVIN Unregistered guest Posted From: 195.29.76.92 |
**** Kevin's offer to engage in certain recreational activities with Marat has been edited due to his unimaginative vocabulary and general lack of any interesting things to say. Making such offers to minors is illegal, and making them to others is ill-advised, especially if you know nothing about their recent medical history. They also associate you with a subculture that is frequently subjected to discrimination and abuse, none of which anyone generally welcomes. As I suspect Marat does not welcome your advances, please direct them to some other web page, preferably one that does not have a large audience of young people who only have a vague idea of what I am talking about, but who are nonetheless giggling nervously as they read this. **** | ||
| DR.EVIL Unregistered guest Posted From: 195.29.76.92 |
HE HE Good one Kevin.  | ||
| Marat Orazov (Marat_o) Intermediate Member Username: Marat_o Post Number: 37 Registered: 6-2005 |
I am sure Kevin is angry at me, for pointing out his wrongs, however as mentioned in the above message of the administrator, I do not welcome propositions such as those Kevin made. His remarks put him in the group of people that I generaly try to avoid, for obvious reasons, to most at least. | ||
| Alexander N Roberts (Whoo_mythbusters) New member Username: Whoo_mythbusters Post Number: 3 Registered: 9-2005 |
I would just start ignoring "kevin", he can't even put words together in a compleate thought let alone know what he is talking about. | ||
| KEVIN Unregistered guest Posted From: 195.29.72.49 |
****** Administrator: Kevin has once again extended his offer, although this time he was not able to spell it correctly. ******* | ||
| possum (Unregistered Guest) Unregistered guest Posted From: 64.33.151.154 |
I tend to agree with Alexander N Roberts. KEVIN, you are out numbered here i suggest either changing your way of thinking and expressing yourself, or shutting up and sitting down. | ||
| justine aquino (Mnado) Advanced Member Username: Mnado Post Number: 59 Registered: 12-2005 |
hey KEVIN?how bout you do the job opening the cathode tube?and send pictures if your still alive ok?no offense but i think you are to scared to do it your self thats why you let other people do it (Message edited by mnado on January 1, 2006) | ||
| justine aquino (Mnado) Advanced Member Username: Mnado Post Number: 60 Registered: 12-2005 |
and about the non-toxic part you said.you are so wrong about that,when you inhale phosphor its like eating one box of match | ||
| Simon Quellen Field (Sfield) Senior Member Username: Sfield Post Number: 873 Registered: 12-2004 |
Don't confuse a phosphor with the element phosphorus. Both words come from the Greek, meaning to carry light. But there are many phosphors, (compounds which glow when illuminated with higher frequency light), and only one element named phosphorus, which is used in matches. | ||
| mnado (Mnado) Senior Member Username: Mnado Post Number: 131 Registered: 12-2005 |
sorry,i guess i got that one wrong..its been a long time since i read this portion see i got my name changed to mnado | ||
| Joshua Martin (Mr_) Member Username: Mr_ Post Number: 16 Registered: 1-2006 |
My sister cracked a tv and got 36 stitches from one and a month later DON'T DO IT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! | ||
| Troy (Pharoah) Intermediate Member Username: Pharoah Post Number: 24 Registered: 3-2006 |
Okay, I don't know what is going on with this thread, but I think that if you discharge the CRT and then break off the glass tip at the smallest end it will not implode. Don't take my word for it, though. | ||
| alex (Alex) New member Username: Alex Post Number: 2 Registered: 4-2007 |
If you work with a CRT like a tiran you will get hurt ... anyway i did deactivate some crt's you just need to be realy carefull ... i usualy just break a pin to get a small hole (even so it is dangerous) i used to deal with CRT's an deactivating them for the front side that i used to create telescope mirrors Anyways ... instead of destroyng CRT's you might consider constructing an osciloscope from it (it's more usefull and safe then simply "killing the CRT and probably yourself" :P) sorry for my bad english :| (Message edited by alex on June 1, 2007) | ||
| marx (Vdg) Member Username: Vdg Post Number: 11 Registered: 4-2008 |
Could you make a marx generator using those HV capacitors from a junked CRT? | ||
| Patrick (Firewire) Advanced Member Username: Firewire Post Number: 81 Registered: 12-2007 |
No, but you could get a good spark from it. I just don't know If it would arc... A Marx Generator is made up of capacitors connected in parallel to one another, with resistors connecting them in series, and is usually determined by stages (combination of caps and resistors)... Though you could use the TV set to charge the capacitor and power your Marx generator, I suggest that you don't play with your TV set, the above messages tells how dangerous a dismantled TV set can be, and what to expect when you try to open one... If you're really into high voltage just buy a device specified to do the job... |
