Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Early Color Television

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #31  
Old 12-08-2010, 11:07 AM
sampson159's Avatar
sampson159 sampson159 is offline
sampson159
 
Join Date: Sep 2007
Location: columbus,ohio
Posts: 2,170
that story reminds me of my post about "hillbilly frank".he cut the band of a magnavox crt to use in something else.he fired the set up and after a few minutes,i heard a blast like a grenade.the set exploded in his living room.he was on the phone with me when it happened.i have cut off the ears on a magnavox crt but never cut the pressure band.though it didnt pull the nails from the walls,it did leave pieces everywhere.
Reply With Quote
  #32  
Old 12-08-2010, 10:48 PM
bgadow's Avatar
bgadow bgadow is offline
VideoKarma Member
 
Join Date: Oct 2003
Location: Federalsburg, MD
Posts: 5,814
Why was the band cut off during rebuilding-heat expansion issues?
__________________
Bryan
Reply With Quote
  #33  
Old 12-09-2010, 09:26 AM
julianburke julianburke is offline
VideoKarma Member
 
Join Date: May 2004
Location: Knoxville, Tennessee
Posts: 644
Yes, when the tube goes into the over the band has to come off because it has to expand or it definitely will go off in the oven.
__________________
julian
Reply With Quote
  #34  
Old 12-09-2010, 10:00 AM
DaveWM DaveWM is offline
VideoKarma Member
 
Join Date: Feb 2009
Location: Orlando FL
Posts: 5,607
nver understood how the band prevented implosion, thats for that explantion.
Reply With Quote
  #35  
Old 12-09-2010, 10:03 AM
DaveWM DaveWM is offline
VideoKarma Member
 
Join Date: Feb 2009
Location: Orlando FL
Posts: 5,607
so I guess the follow up question would be, if a bonded glass CRT has the cataract removed, then why would the CRT not implode upon removal of the bonded glass? Can a band be added to a tube that had the bonded glass (guess before the removal takes place) to be safe again? if so is there a procedure/tools/tension mearuring device that should be used?
Reply With Quote
Audiokarma
  #36  
Old 12-09-2010, 10:11 AM
miniman82's Avatar
miniman82 miniman82 is offline
First Light: 1952-2011
 
Join Date: Jun 2009
Location: Great Mills, MD
Posts: 4,159
Because the glass is just glued to the front of the CRT, it does not impart any tension on the face at all like a band does.
__________________
Evolution...
Reply With Quote
  #37  
Old 12-09-2010, 10:42 AM
DaveWM DaveWM is offline
VideoKarma Member
 
Join Date: Feb 2009
Location: Orlando FL
Posts: 5,607
besides the band or safty glass is there a difference in the contsrution of the two?

What I am getting at is "should" a band be added to a CRT that has the safty glass removed.

If they are the same basic CRT just one uses bonded glass and the other has a band, then it would seem that a band should be added if the bonded glass is removed.
Reply With Quote
  #38  
Old 12-09-2010, 05:07 PM
old_tv_nut's Avatar
old_tv_nut old_tv_nut is online now
See yourself on Color TV!
 
Join Date: Jul 2004
Location: Rancho Sahuarita
Posts: 7,184
Quote:
Originally Posted by DaveWM View Post
besides the band or safty glass is there a difference in the contsrution of the two?

What I am getting at is "should" a band be added to a CRT that has the safty glass removed.

If they are the same basic CRT just one uses bonded glass and the other has a band, then it would seem that a band should be added if the bonded glass is removed.
As far as I know, they would NOT be "the same basic CRT," as I don't think you will find the same part number with a safety glass OR a band - it will be one or the other. Note the danger of implosion of a banded tube when the band is removed. This tells me the banded and unbanded tubes must be basically different. The engineers may have determined that a particular glass kit could be used either way, but I don't know if that has ever been done, unless someone who knows tells us.
Reply With Quote
  #39  
Old 12-10-2010, 01:03 AM
aidynphoenix's Avatar
aidynphoenix aidynphoenix is offline
VideoKarma Member
 
Join Date: Aug 2005
Location: wentzville, mo
Posts: 72
when i was about 11 years old me and some of my friends were playing around in a house that had burnt down months before we went in it..
the roof had collapsed in several of the rooms. and there was a large tv in the living room. the case was real wood and i remember the screen looking grey and not black like moden screens..
the tv was atleast 32inches..

we were throwing rocks at it trying to break it.. after all we were kids and the tv was glass...
i was throwing big rocks or chunks of cement at it.. it was only scratching the screen..
my friend threw a small rock at the screen and BOOOOOMMMMM!!!
it was a amazing sound.. it felt like sombody hit me in the chest.
i actually moved alittle from the sound it made..
it was louder than the artilary shell fireworks..

it was definetly something i didnt expect to happen.
Reply With Quote
  #40  
Old 12-11-2010, 01:06 PM
Kiwick's Avatar
Kiwick Kiwick is offline
slave to 3 equines
 
Join Date: Mar 2007
Location: Italy
Posts: 448
A couple of scary implosions on YT...

http://www.youtube.com/watch?v=NnZ39EL-wF0

http://www.youtube.com/watch?v=zKvyGt7xhGw
Reply With Quote
Audiokarma
  #41  
Old 12-11-2010, 01:22 PM
aidynphoenix's Avatar
aidynphoenix aidynphoenix is offline
VideoKarma Member
 
Join Date: Aug 2005
Location: wentzville, mo
Posts: 72
the 2nd one definetly shows how deep and loud the boom can be.. sombody needs to do it with a really good microphone..
when i did it.. it felt like sombody hit me in the chest.
Reply With Quote
  #42  
Old 12-11-2010, 05:05 PM
Aussie Bloke's Avatar
Aussie Bloke Aussie Bloke is offline
VideoKarma Member
 
Join Date: May 2004
Location: NSW, Australia
Posts: 560
Here's a video of someone smashing the 40" screen of a Sony Trinitron with a sledgehammer:
http://www.youtube.com/watch?v=XNojx-r1TY8
__________________
AUSSIE AUSSIE AUSSIE!!!!! OI OI OI!!!!!
Reply With Quote
  #43  
Old 12-11-2010, 07:53 PM
DaveWM DaveWM is offline
VideoKarma Member
 
Join Date: Feb 2009
Location: Orlando FL
Posts: 5,607
Reply With Quote
  #44  
Old 12-11-2010, 09:18 PM
aidynphoenix's Avatar
aidynphoenix aidynphoenix is offline
VideoKarma Member
 
Join Date: Aug 2005
Location: wentzville, mo
Posts: 72
well atleast he took safety into account.
although he should of have worn gloves also.
Reply With Quote
  #45  
Old 12-11-2010, 11:02 PM
AUdubon5425's Avatar
AUdubon5425 AUdubon5425 is offline
VideoKarma Member
 
Join Date: Aug 2008
Location: Picayune, Miss.
Posts: 1,769
I was sorta hoping for the shrieks of agony to commence...
Reply With Quote
Audiokarma
Reply


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

Forum Jump


All times are GMT -5. The time now is 02:58 PM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.