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    I have busted them at the yokes. Why would busting them at the band make them explode? What am I missing?


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    eesakiwi is offline Metal Recycling Entrepreneur
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    Quote Originally Posted by IdahoScrapper View Post
    I have busted them at the yokes. Why would busting them at the band make them explode? What am I missing?
    Its a weak link. Theres different glass in the front of the screen & the rear of the screen.
    Because the glass is welded together when its hot, as its cooled down theres been different rates of contraction of the glass.
    When its normal cold, theres a stressed band around the screen at the join.
    Now, since the tubes under vacuum all that needs to happen is for something to break the tube at the join.

    That causes it to break 360 degrees around the tube & then the vacuum takes over & tries to suck the fount of the screen inwards.
    Then you now have pressure in two different directions, in & out, as the screen explodes/implodes it shoots out the finger sized shards of razor sharp glass, at high speed, for about 6+ feet.
    Along with the shockwave it causes too.

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    eesakiwi is offline Metal Recycling Entrepreneur
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    Quote Originally Posted by IdahoScrapper View Post
    I have busted them at the yokes. Why would busting them at the band make them explode? What am I missing?
    Busting then at the yokes will cause the glass to break there & the gas gets let in quickly. That kills the vacuum effect.
    I'm hoping you mean at the rear of the coils etc, though I do see a lot busted just under the yoke.

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    There is more total vaccuum the larger the surface area. Also the crt is normaly under vaccuum so upon breakage of the larger surface area, shrapnel is first drawn inward, then it bounces violently off the inside and back out until all of the energy of the implosion is spent. I have released the vacuum before by cracking the little tip at the yoke. Now I am concered about polution. If the yoke end was later sealed with silicone; would that be a better practice?
    Last edited by Resourceful; 01-03-2012 at 03:05 PM.

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