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Registered Member #135
Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
what do you expect, I learned it from my grandfather who had been doing it for years.
The gun is not a loss, its just that you have to clean it. If you do it quickly with some acetone, you will not comprimise the nickle too much. Corrosion is an issue. The guns should be stored carefully, but also to prevent damage to the sensitive filament.
Your next task will be to get suitable getter materials (berillium, barium, magnesium, aluminium, calcium), a hard vacuum(2 stages....roughing and diffusion) and a suitable new home. But you're on your way. :)
Registered Member #176
Joined: Tue Feb 14 2006, 09:35PM
Location:
Posts: 44
Hi All,
I did my c & g in TV theroy and part of that was how to correctley dispose of old TV tubes.
The correct method as recomended by the manafactures is to use a center punch. Where the glass nipple is on the tube neck align a center punch and hit it with a hammer one firm hit and it should not implode. You will hear a hissing noise but thats about it.
You can then remove the tube neck for the e guns with ease.
The method we used for doing this was with a cheap glass cutter cut the glass on the neck tap it with a hammer and the glass came away leaving the intack guns.
I allways wear saftey glasses when doing this. After all if anything goes wrong thing of all that glass and where its likley to go.
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Yay for the secret life of machines! I think it's about my favourite science-related TV show ever.
I remember once trying to dispose safely of a 20" CRT. I knew you were meant to break the glass nipple, but it was inside a plastic cap glued on with silicone. So I tried chiselling the plastic cap with a screwdriver and hammer. Nothing happened so I hit it a bit harder. Nothing happened again so I gave it a real good whack. The whole neck snapped completely off the tube with a loud Thoomp! sound.
I had covered the tube in a couple of thick blankets and was wearing goggles, because I was worried about screwing up like that. But actually no glass flew anywhere.
One time, I took a real old round CRT from a 405 line TV up to the dump for disposal. One of the dangerous ones with no rim bands The guy looked at it for about a second then banged it on the side of a dumpster to crack the fill stem and threw it in. It totally failed to implode and kill him.
Years and years ago I remember trying to smash the front of a TV tube by throwing rocks at it. They just bounced off. I got some help from a friend who could throw them harder and eventually it broke. Again it just shattered with no violent explosion.
Registered Member #116
Joined: Fri Feb 10 2006, 03:19AM
Location: Erie Pa, USA
Posts: 29
The front side of a crt is extremely resiliant, I have shot them at short range with a .22lr rifle with no vacuum loss...but the 2nd shot in the same place will do the trick. Also be careful to discharge the crt anode if it has been run recently. Rich
Registered Member #131
Joined: Fri Feb 10 2006, 09:25PM
Location:
Posts: 185
Steve Conner wrote ...
I remember once trying to dispose safely of a 20" CRT. I knew you were meant to break the glass nipple, but it was inside a plastic cap glued on with silicone. I
That’s what mine were like! I just took a screwdriver and a hammer and taped the tiny glass button and after a wile, it broke and air hissed in.
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Breaking CRT Tubes
The guy looked at it for about a second then banged it on the side of a dumpster to crack the fill stem and threw it in. It totally failed to implode and kill him.