Warning! Kaaaaboooomm!

[kc8adu]

someone dropped off a toshiba 36" tv last week to get rid of it.i found that it had a worn out crt so it stayed on the dolly and was rolled out to the loading dock.back was off to get the crt tester on it.tried to slowly tip it onto its face off the dolly when all hell broke loose.imho it was damaged somehow and just laying it on its face set it off.
the boom brought out half the neighborhood.crt totally disintigrated and peppered my hand with bits of glass.several minor cuts and ringing ears is all i got.my help got hit with a big chunk but not cut.will try to get pics later.

[shovenose]

Re: Warning! Kaaaaboooomm!

oops

[Krankshaft]

Re: Warning! Kaaaaboooomm!

There had to be some type of fracture or weakness somewhere.

The front of the CRT is the thickest part so the damage probably wasn't there.

I'd be willing to bet there was hidden damage around the rim concealed by the frame where you couldn't see it from dropping or rough handling. Tipping the TV by the front plastic frame applied pressure around the rim and when the TVs weight was on it's face it gave.

Well at least it's a modern implosion proof design an old tube would have gone off like a claymore mine.

To think I've done the same thing countless times without thinking twice.

Could the bad picture have been due a vacuum leak and not a worn tube?

[Toasty]

Re: Warning! Kaaaaboooomm!

+1

Saw this when I was selling parts. We handled Channel Master replacement CRT's and the other guys handled some brand whose name age and time have removed. Many techs had problems with face to tube fractures and dead tubes after a short while. Turns out the other manufacturer had a problem in the face re-attachment process. Took them over a year of failures to get it right. CM was still a better tube...

[smason]

Re: Warning! Kaaaaboooomm!

When I worked for Philips back in the 70's we'd replace the odd tube in Magnavox sets. We used to try to get them to implode when tossing them in the dumpster (e-cycle?, re-cycle?, safely dispose of lead?, hey it was 1978 ), never did get more than a loud hiss out of 'em. Thinking back, we were probably lucky

[Wizard]

Re: Warning! Kaaaaboooomm!

WoW!!

That means rimband failed or was not tensioned properly during CRT manufacturing.

You are very lucky! See doctor for the glass removal?

We dispose of CRT into bin and we didn't get one to implode. Only time one CRT did in a way was coworker was carrying a box and power cord snagged in his hand and jerked to free the snag. Except 14" TV fell 6 feet onto concrete floor face first. BOOM. Face intact but the bell imploded.

Cheers, Wizard

[Krankshaft]

Re: Warning! Kaaaaboooomm!

If you're going to chuck a TV in a dumpster neck it it first.

Tap the neck with a hammer lightly that's the thinnest part of the glass due to the yoke being in that area. You'll get a hiss and that's about it. You could also drill a 1/4" hole or so in the anode cap but it would take longer for the tube to fill. At least then there is no risk when the dumpster is emptied.

[Toasty]

Re: Warning! Kaaaaboooomm!

Necking seems risky. I used to cover them with a box or blanket and just pop the nib at the socket.

[goodpsusearch]

Re: Warning! Kaaaaboooomm!

If you're going to chuck a TV in a dumpster neck it it first.

Tap the neck with a hammer lightly that's the thinnest part of the glass due to the yoke being in that area. You'll get a hiss and that's about it. You could also drill a 1/4" hole or so in the anode cap but it would take longer for the tube to fill. At least then there is no risk when the dumpster is emptied.

Just recycle it.

[kc8adu]

Re: Warning! Kaaaaboooomm!

i still have 3 cm lifetime 21fjp22 tubes new in box.late 70's vintage.all test perfect.waiting till i get time to restore a few of these roundies i have.
cm did a great job on their rebuilds.i replaced very few back in the day.

+1

Saw this when I was selling parts. We handled Channel Master replacement CRT's and the other guys handled some brand whose name age and time have removed. Many techs had problems with face to tube fractures and dead tubes after a short while. Turns out the other manufacturer had a problem in the face re-attachment process. Took them over a year of failures to get it right. CM was still a better tube...

[kc8adu]

Re: Warning! Kaaaaboooomm!

was fully assembled other than the back.

[Toasty]

Re: Warning! Kaaaaboooomm!

WOW! You are damn lucky not to have been hurt worse than you are. Jeeze!

[Krankshaft]

Re: Warning! Kaaaaboooomm!

Never saw a shadow mask or aperture grille up close before. Can't tell what type of tube it was to verify.

Rebuilds what did CM actually do to rebuild a tube back in the day? Replenishing cathode emissive substance, replacing gun assembly, re-phosphoring the screen, etc?

[Wizard]

Re: Warning! Kaaaaboooomm!

For this toshiba TV, probably Mitsubishi CRT or RCA CRT or if the TV is very late model, could be generic CRT.

Cheers, Wizard

[Toasty]

Re: Warning! Kaaaaboooomm!

CRAP!

I ~had~ to work the store the day the manager got to go to CM plant where they did this. He did buy drinks that night though, so it wasn't all bad.

IIRC - New gun, re-phosphor & screen, new aquadag. There were 3 levels of tubes and each had different processes done. The top end warranty, and most costly, was the Lifetime, then I think there was a 3 year and a 1 year. I don't know if I have any old CM books that describe the whole process. If I find it (or fall over it), I'll post it up. So much crap around here....

[Toasty]

Re: Warning! Kaaaaboooomm!

Last Lone Wolf CRT Rebuilder Closing

'tis a sad day...

[kc8adu]

Re: Warning! Kaaaaboooomm!

Last Lone Wolf CRT Rebuilder Closing

'tis a sad day...

yes indeed.
scotty did a ton of great work for me over the years.everything from antique to industrial.could not tell his from brand new originals.
glad i had a few tubes rebuilt a while back just to have em.

[mbates14]

Re: Warning! Kaaaaboooomm!

There is nothing wrong with that CRT... itll buff right out.

[joedaddy277]

Re: Warning! Kaaaaboooomm!

Al-Qaeda claimed responsibility.