My first spontaneous CRT implosion.

[dr.ido]

I had my first spontaneous CRT implosion the other day.



The set is a Rank Area C2601 from 1975 - Locally assembled from imported kits, these were one of the first color sets available in Australia. I picked this one up of the side of the road a couple of weeks ago, but I hadn't got around to doing anything with it yet. It had been sitting on the shelf untouched.



I was in another part of the building when I heard the bang.



The LCD survived the incident.



The force pushed broke the back cover off it's mounts.



The CRT was a Thomas Electronics rebuild.



The yoke and clover leaf were damaged, but the chassis while full of glass particles seems to be ok.



The remains of the shadowmask.



It's is hard to see in the picture, but the join is uneven - not that I've seen many rebuilds, so this maybe normal.

[Electronic M]

Wow. Looks like it murder-suicided with the LCD set infront of it.

Glad I have yet to experience an implosion knock on wood.

I wonder how common deltagun CRTs are over there. 23", 25" rectangular and 21" round are easiest to find here everything else takes luck and patience.

[Chip Chester]

I trust you sent in the warranty card back in the day...

I've seen broken via shipping or by choice, but never spontaneous. (Unless that LCD was giving him a hard time...)

[zeno]

Growing up we had a 50's Zenith & the separate safety screen disintegrated.
Took out the remains & we used it for years. Seen a few go to air over nite for
no reason & even had a customer shoot his Admiral console. He got pissed
when the Bruins lost a game & shot the SOB with his 1911 45 cal.
BTW thats a Hitachi chassis, same looking as US ones in the early 70's.

73 Zeno
LFOD !

[mr_rye89]

I've only seen that happen whilst EOLing a TV with a gun. Don't sit too close to the TV I guess

[old_tv_nut]

I think this is the first time I've heard of a tube imploding "spontaneously" other than early developmental units in the lab.

Maybe someone with more experience can enlighten me.

[dr.ido]

We didn't get color TV until 1975 - only a few of the very first models sold here were delta gun. Most of not all of the components in this set are NEC.

The only realistic way to get this set working again would be to swap in a more recent chassis and inline tube - if I can make a 27" SPC fit in there - 26" aren't that easy to find anymore. Otherwise, it may end up as a pet bed

[dieseljeep]

Originally Posted by zeno

Growing up we had a 50's Zenith & the separate safety screen disintegrated.
Took out the remains & we used it for years. Seen a few go to air over nite for
no reason & even had a customer shoot his Admiral console. He got pissed
when the Bruins lost a game & shot the SOB with his 1911 45 cal.
BTW thats a Hitachi chassis, same looking as US ones in the early 70's.

73 Zeno
LFOD !

It seems that the problem was more prevalent with a Zenith! Lucky thing, it was at night when no one was in the room.
The label on the back states "Rank-NEC".

[MadMan]

There must've been some kind of defect in the front glass. A ticking time bomb. I would guess, anyway. What else could it have been?

[Josef]

I have seen brandnew CRTs cracking caused by fast temperature changes. In this cases the neck broke of but nothing dramatic happend.
The only damaged screen glasses were caused by fall.
I worked in a TV manufacturing plant until 2003 when it went bankrupt.
So I'm talking about 100000s of CRT TVs

[JohnCT]

Originally Posted by Josef

I have seen brandnew CRTs cracking caused by fast temperature changes. In this cases the neck broke of but nothing dramatic happend.
The only damaged screen glasses were caused by fall.
I worked in a TV manufacturing plant until 2003 when it went bankrupt.
So I'm talking about 100000s of CRT TVs

Same here (although in the field).

I've never once heard of a CRT imploding with anything short of a gunshot to the faceplace.

John

[Ed in Tx]

Originally Posted by JohnCT

I've never once heard of a CRT imploding with anything short of a gunshot to the faceplace.

John

Originally Posted by Josef

The only damaged screen glasses were caused by fall.
I worked in a TV manufacturing plant until 2003 when it went bankrupt.
So I'm talking about 100000s of CRT TVs

Makes me feel a little better about the 1987 vintage NEC 30" TV stored out in the garage with its temperature extremes for the last 12 years next to my 1988 S10 pickup truck. If that tube imploded like the OP, the truck would likely be totaled! I may still have to get that out of there just to be safe.

[Electronic M]

ISTR someone posting about a spontaneous implosion of the CRT in a 50s set in their collection here on VK in the last 2-3 years...

I used to own an otherwise mint with paperwork CBS 50s console that the original owners told me had the safety glass spontaneously shatter when it was fairly new.

[jr_tech]

Originally Posted by Electronic M

ISTR someone posting about a spontaneous implosion of the CRT in a 50s set in their collection here on VK in the last 2-3 years....

thread here : http://www.videokarma.org/showthread...t=packard+bell

jr

[colorfixer]

Could there have been a scratch or chip on the tube face?