Discharge CRT UNSAFE way!

How to discharge a television CRT (the UNSAFE way)! Please do not try this at home, This can hold 30kv or 30,000 volts of electricity. If you still think you want to try, go here first: http://www.repairfaq.org/REPAIR/F_safety.html

Category:

Science & Technology

Tags:

• television
• tv
• crt
• cathode
• ray
• tube
• unsafe
• discharge

[anorwood84]

I thought what held the charge was the anode. (The metal clip inside the rubber cup thats wired to the flyback) Not the tube itself.

[mcraze123]

yea you are correct, but I've seen sparks come out of the TV before, I think it acts like a capacitor and holds a charge. I worked at a TV/computer repair shop for three years. I didn't really do much tv repair, I was the one who fixed the computers. I learned a lot about testing power supplies and circuits though.

[soundspark]

I don't think the CRT actually got discharged.

[mcraze123]

yea, It didn't really have that much of a charge on it. And I didn't start recording until after the first time he held the pliers in front of the hole for the anode. You could hear and see a few small discharges if you were there, but the mic or camera didn't pick them up well...

[wbcisgay]

@1forest1n That was you that did that? You asshole it ruined my dinner! :D

[1forest1n]

All true I once watched a tv give of a spark that blew out every light bulb in my street, car alarms went off and every tv dinner in my freezer got cooked!!! True story honest.

[sideslide23]

@DanielHeusburgh same thing happens to a regular light bulb.

[AerialTheShamen]

@kittyfanatic1980 ...and when the xray builds up, it will become a radioactive critical mass and explode like the Hiroshima bomb.

Absolute dullshit. A CRT can never hold deadly voltage for 50 years (its just static electricity between inside and outside metal paint on the glass; air humidity discharges it at the contact). May be the powder cloud from implosion itself MIGHT produce a lightning, but it sounds unplausible.

[kittyfanatic1980]

speakerfreak is ABSOLUTELY CORRECT the crt itself can hold a DEADLY charge. its a vacuum tube and henceforth can store deadly voltages for decades. ask my old friends who found an olddddddd tv by this abandoned farmhouse. the house was abandoned good 40 50 years and this was early to mid 90s but they proceeded to pop crt and they had to run bc a HUGE white bolt came directly at them. thank god for the ditch or theyd prob. be dead now.

[SpeakerFreak95]

@mcraze123 the tube can hold a charge or even build up a new charge, BE CAREFUL!!!

[DanielHeusburgh]

What happens if you smash it :)

[BankaiIchigo12345]

The pliars tip was NOT grounded! Which meant YOU ARE the ground, and a milimeter thick of rubber grip is NOT a usefull ammount of HV insulation for a full 30kv. If this was charged, you'd be in a world of hurt right now, NOOB!

[Watcher3223]

@laserman55901

The other thing to observe is that the anode cap on this tube has already been detached. Chances are that whatever charge was in the tube had been discharged when the anode cap had been removed, especially if the anode was ever allowed arc to ground during the removal of the cap.

If that is the case, then sticking the tip of a pair of pliers in the CRT anode would be about as dangerous as white bread toast.

[Watcher3223]

@laserman55901

Fortunately, for the man using the pliers, the charge in the tube is relatively low in amps. If you get zapped by it, it won't kill you. However, it will hurt like hell.

Plus, the capacitive charge is parasitic and doesn't remain in the tube for very long; leave it unpowered for a few days or even just a few hours and most, if not all, the charge in the tube will have been lost.

Of course, you should always arc the tube to the DAG ground before detaching the anode cap.