Things to save from a CRT TV being scrapped

[DanielParticipant @daniel]

Could someone explain to me the personal injury risks, regarding an imploding object ?

Or have I overlooked something obvious ?

Daniel

[frank brownParticipant @frankbrown22225]

The problem with implosions is that the bits don't stop in the centre, but bounce off each other. CRTs are tough as old boots, other then dropping them on your foot or stupidly breathing in the dust, no problems. Ion trap magnets worth keeping, like the LOPT. Old cabinets worth sitting on! Recent TVs I have stripped for their loudspeakers were a waste of time as the modern loudspeaker has a foam suspension to the cone which rot through after 10 years, so it leaks air, while the 1960 grey pressed steel ones at least kept an air seal for decades. Something to think about the modern big sets that need sound bars, cos' their internal sound are all very poor and we all know that your soundbar loudspeakers will be rubbish too in a few years.

TV Studio sound is brilliant, shame most of you lot won't have heard it.

Frank

[Bob McParticipant @bobmc91481]

I had worked as a tv engineer for many years and dealt with changing the old black & white and CRT colour tubes, one thing you may not be aware of is that the high voltage used for colour tubes around 25kV charges up the glass dielectric just like a capacitor, and the charged glass slowly releases its charge over quite a long period of time into the 'plates' producing a very high voltage.

The same goes for the black & white tubes but with only about 16kV.

So…when handling the tube, don't put your finger in the little connector hole!!! even if it was months ago that the tv set was used and even if you short the thing out with a couple of screwdrivers from the hole connector to the outer coating of the tube..! it can re-charge itself and give you a nasty reminder that the electric stresses in the glass are still there.

I don't advise smashing the tubes and there is not much inside to use, the colour tubes do have a 'shadow mask' which is like a very fine sieve …. please also be aware that on being smashed a kind of dust seems to be emitted which may be the phosphor from the screen.

..Bob..

[BazyleParticipant @bazyle]

Looking across the living room I can see the 4ft high cabinet of our first TV, bought second hand in about 1959, BBC1 only, 13 in screen, nice twin doors at the front. Sadly the innards have long gone. Has been a bookcase for a while.

Depending on age the old TV might yield some useful BA screws.

[Ian S CParticipant @iansc]

You can fit quite a nice fish tank in a TV cabinet, you then have movies and you don't need a licence (don't think you need a licence to keep fish in UK—yet).

Depending on it's age there maybe quite a bit of metal work in there, plated steel sheet as brackets etc, aluminium as chassis, brass stand off pillars, screws,nuts and bolts, wood.

Ian S C

[John Stevenson 1Participant @johnstevenson1]

All of which will never get used and turn what could be a nice working area into a tip

[Ian S CParticipant @iansc]

JS, true

Ian S C

[BazyleParticipant @bazyle]

Unlike the parts from a lawnmower I took apart yesterday that was old enough I hope to be whitworth nuts and bots not UNC. The slightly newer Suffolk Colt that gets the chop today has plastic bits so might even be metric.

[SandgrounderParticipant @sandgrounder]

Posted by John Stevenson on 10/09/2016 12:13:35:
All of which will never get used and turn what could be a nice working area into a tip

I agree with John on this, amongst my many interests I am a radio amateur and have built quite a few bits and pieces over the years, about 10 years ago I dismantled a Sony 32" CRT TV looking for useful items, however the only things I found that could be useful were 2 loudspeakers which I kept until about 6 months ago and then binned them having moved them around countless times as they were always in the way.

The most rewarding part of the exercise was dropping the bare tube about 10' onto the concrete floor at the local tip.

John

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