Re: Happy Fun Band...

Am I the only one that gets REAL nervous when I get near the booth at trade shows
where they have this mallet repeatedly striking the center of a working monitor
to "demonstrate how their touch panels hold up to use"?

John Robertson wrote:

> I hope this is a joke...replacing the band on a tube would be extremely
> dangerous in real life. The manufacturer of the tube has special tests to
> make sure it is done correctly, I really doubt one could be successful in a
> home environment, and would be reluctant to be within about sixty feet of a
> picture tube so modified...might not happen immediately (BANG) but sooner
> or later...I hope you carry liability insurance for the damage this will do
> when one explodes!
>
> John...
>
> (who was wrong about the risk of lethality of the HV stored in the tube.)
>
> At 09:32 AM 12/11/1999 -0500, you wrote:
> >Disclaimer: Don't anyone go out and do anything suggested below:
> >
> >The way I do tube repair is this.
> >
> >1. first put on all the safety equipment - face masks, gloves, etc..., then
> >carefully puncture the little tip at the end of the tube, but with some
> >vacuum gum on the puncture area.
> >2. through a small capillary tube, allow the vacuum to fill with air.
> >3. Next, safely remove the band and replace the ears, and make sure the
> >strap is tight.
> >4. When that's done, pull vacuum on the tube with a good vacuum pump (which
> >can be made from and old refrigerator compressor.)
> >5.With that done, carefully remove the capillary tube, but leaving the gum
> >to seal the opening.
> >6.Now, power it up and it should work fine now, but with the corrected
> >mounting tabs.
> >
> >If the picture becomes a little dim or blurred over time, go back to step 4
> >
> >Note that while the tube vacuum is released, you can do all kinds of neat
> >things. My favorite is this:
> >If the tube has bad gun(s), carefully scribe the perimeter near the end of
> >the neck then tap the end to release the guns and socket.
> >Now you can remove the electron guns and play with them and either fix them
> >or change them out with a working set from another monitor.
> >When replacing them be sure to pay close attention to alignment as it is
> >critical. Seal the cut with vacuum gum and a strip of duct tape. and pump it
> >down.
> >
> >If you feel daring, you can also scribe the edge of the tube so you can fix
> >or replace the shadow mask.
>
> John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
> Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
> http://www.flippers.com
> "Old pinballers never die, they just flip out."

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