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PaulB
Joined: 26 Oct 2007
Posts: 359
Location: Bonnie (but rainy) Scotland
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| Posted: Sat Sep 05, 2009 12:38 pm Post subject: Glass Cloth tape or medical adhesive for tubes? |
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I've seen it mentioned that when installing new tubes its worth putting a strip of Glass Cloth Tape down each side of the tube so that the electronics have something to grip onto. I've just read in one of Curt's FAQs/How-To's that medical adhesive can also be used ( details here http://www.curtpalme.com/Sony_G90_tube_replacement6.shtm 2nd and 3rd photos down ).
Any one of these better than the other? Medical tape is dirt cheap but Glass Cloth has a high heat resistence, common sense would make me go for the Glass Cloth but can medical tape really be used on tubes without being heated to a crisp?
Thanks,
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Paul
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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PaulB
Joined: 26 Oct 2007
Posts: 359
Location: Bonnie (but rainy) Scotland
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| Posted: Sat Sep 05, 2009 1:36 pm Post subject: |
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Thats good enough for me!
Thanks Athanasios!
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Paul
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Sat Sep 05, 2009 1:49 pm Post subject: |
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I believe the correct name is surgical tape.
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Mark_A_W
Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia
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| Posted: Sat Sep 05, 2009 2:08 pm Post subject: |
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Heated to a crisp?
The tubes barely get warm to the touch. Not hot.
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PaulB
Joined: 26 Oct 2007
Posts: 359
Location: Bonnie (but rainy) Scotland
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| Posted: Sat Sep 05, 2009 2:34 pm Post subject: |
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I must admit that I simply presumed the tubes were hot because they glowed, the surgical tape makes more sense now.
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Paul
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Sat Sep 05, 2009 4:26 pm Post subject: |
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I HATE the tape on the tube necks and do not use it. It inevitabbly winds up snagging a coil when you slide them on and it's not worth the hassle. clamping dire3ctly onto the glass works fine unless you plan to have the PJ mounted in the back of a truck
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
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Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Posted: Sat Sep 05, 2009 5:12 pm Post subject: |
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I don't like the tape either, but I'd still recommend using it. Like most materials, glass has an inherent dimensional instability... It expands and shrinks when it heats and cools. It probably only ever sees a 30 or 40 degree delta in use, but that 30 or 40 degrees is enough. Without the tape, the coil can move over time, drifting away from where you (thought) you locked it down. It's the heating/cooling that is the reason the manufacturers use the tape - not for secure shipping.
SC
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Sat Sep 05, 2009 5:36 pm Post subject: |
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| ecrabb wrote: | I don't like the tape either, but I'd still recommend using it. Like most materials, glass has an inherent dimensional instability... It expands and shrinks when it heats and cools. It probably only ever sees a 30 or 40 degree delta in use, but that 30 or 40 degrees is enough. Without the tape, the coil can move over time, drifting away from where you (thought) you locked it down. It's the heating/cooling that is the reason the manufacturers use the tape - not for secure shipping.
SC |
nashou
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Mark_A_W
Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia
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| Posted: Sat Sep 05, 2009 10:51 pm Post subject: |
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NEC's, and I think Sony's have the tape.
Barco's don't (or at least my 808 doesn't).
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Sun Sep 06, 2009 1:10 am Post subject: |
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| ecrabb wrote: | I don't like the tape either, but I'd still recommend using it. Like most materials, glass has an inherent dimensional instability... It expands and shrinks when it heats and cools. It probably only ever sees a 30 or 40 degree delta in use, but that 30 or 40 degrees is enough. Without the tape, the coil can move over time, drifting away from where you (thought) you locked it down. It's the heating/cooling that is the reason the manufacturers use the tape - not for secure shipping.
SC |
the coil itself , made of ,metal and plasic, will heat and expand at many times the rate of the glass. So when the tube heats up the coil should only get tighter not loooser.
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ecrabb
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Joined: 13 Mar 2006
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Location: Utah
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| Posted: Sun Sep 06, 2009 3:44 am Post subject: |
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| draganm wrote: | | the coil itself , made of ,metal and plasic, will heat and expand at many times the rate of the glass. So when the tube heats up the coil should only get tighter not loooser. |
If the metal band heats and expands more then the glass, then it's going to loosen, not tighten! Besides, it doesn't matter... As you pointed out, they're different materials and expand/contract differently. It's the differential between the two that causes the issue. Use the tape, or don't use the tape. You wouldn't use it. I would.
SC
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jask
Joined: 17 Mar 2006
Posts: 10187
Location: kamloops BC
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| Posted: Sun Sep 06, 2009 7:18 am Post subject: |
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| Mark_A_W wrote: | NEC's, and I think Sony's have the tape.
Barco's don't (or at least my 808 doesn't). |
My 1208 does - but only under the neck board clamp. looks just like medical tape or trainers tape but the adhesive is not as 'gummy" so it peeled off pretty easily.
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