why crt's so high voltage - Techist - Tech Forum

Go Back   Techist - Tech Forum > Computer Hardware > Hardware Repairs and Troubleshooting
Click Here to Login
Closed Thread
 
Thread Tools Display Modes
 
Old 07-05-2006, 08:15 AM   #1 (permalink)
Banned
 
Join Date: Sep 2005
Location: LONDON
Posts: 902
Send a message via MSN to robina_80
Default why crt's so high voltage

the cathode tube they hold up to 20,000 volts dont they is that for any crt no matter what size it is, why do they hold that much
__________________

robina_80 is offline  
Old 07-05-2006, 08:22 AM   #2 (permalink)
Memberbot
 
Elbatrop1's Avatar
 
Join Date: Mar 2004
Posts: 4,057
Default

This should help you out
http://electronics.howstuffworks.com/tv.htm
__________________

__________________

Intel E6750...........PSN: ELBATROP
XFX nForce 650i Ultra
Patriot PC2-6400 8GB (4x2GB)
eVGA 9800GT
36GB WD Raptor
120GB SG
1TB SG
Logitech X-530
Samsung SyncMaster 931c
Samsung SyncMaster 750s
Windows 7 Home Premium 64
Elbatrop1 is offline  
Old 07-05-2006, 09:47 AM   #3 (permalink)
Techie Beyond Description
 
Apokalipse's Avatar
 
Join Date: Jun 2003
Location: Melbourne, Australia
Posts: 14,559
Default

Quote:
Electrons are negative. The anode is positive, so it attracts the electrons pouring off the cathode. In a TV's cathode ray tube, the stream of electrons is focused by a focusing anode into a tight beam and then accelerated by an accelerating anode. This tight, high-speed beam of electrons flies through the vacuum in the tube and hits the flat screen at the other end of the tube. This screen is coated with phosphor, which glows when struck by the beam.
voltage is basically the difference in the amount of electrons between two ummm... things, they could be anything really (unless they don't allow much flow of electrons if any, like rubber). but for electricity to move, the electrons must be attracted to something. in a thing with not many electrons, electrons in abundance from another thing will flow more readily towards it.

anyway, this is a pretty poor explanation, but what I'm basically saying is that, the more voltage, the more electrons are attracted to the screen. and that's how the monitor can be quite bright.

did you know static electricity can be thousands of volts?
__________________
Apokalipse is offline  
Old 07-05-2006, 10:43 AM   #4 (permalink)
Lord Techie
 
Nitestick's Avatar
 
Join Date: May 2005
Location: смерти для спаме
Posts: 8,473
Default

expanding on what apok just said, when you get a static shock and a spark jumps from your body to the object that is said to be 30,000+v!!!!!

voltage is not necessarily harmful, current is more damaging.
Nitestick is offline  
Old 07-05-2006, 12:21 PM   #5 (permalink)
Super Techie
 
Join Date: Mar 2003
Posts: 337
Send a message via AIM to shdwsclan
Default

Look at voltage vs amperage.
Thats should solve all of your questions.

Anyways, a crt is basically xray tube.
And if you have an old or cheap monitor/tv, you could be xraying your head, body....and of course....genitals....

There is also a link between such leaking radiation with kids with birth defects and kids getting crooked teeth.
shdwsclan is offline  
Old 07-05-2006, 01:07 PM   #6 (permalink)
Wizard Techie
 
CrazeD's Avatar
 
Join Date: Feb 2006
Location: Maine
Posts: 3,736
Send a message via AIM to CrazeD Send a message via MSN to CrazeD
Default

Have you ever been zapped by a sparkplug, from a car or a dirtbike/ATV or whatever? I have (hurts too). They have around 70,000 volts...but no amps, so they don't hurt you (well it's painful, but they do no damage).

But that's not to say that being electricuted by your TV is a good thing, because that 30,000v's is backed up by 25 - 30amps, so you'll most likely die.
__________________

__________________

Intel Q9400 | Gigabyte EP45-UD3P | G.Skill 2x2GB DDR2 1000 | XFX HD5870

Need website help? PM me!
CrazeD is offline  
Closed Thread

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 05:59 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.