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Author Topic: TV glass toxicity?  (Read 1898 times)

FlashGP

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Re: TV glass toxicity?
« Reply #30 on: June 25, 2019, 07:59:31 AM »
Hi Makky,  the high lead glass should be the front of the screen, to protect the viewer from X radiation.

TV screens have tens of thousands of volts potential in them, the little 16 inch screens we ran in space invader mavhines ran at between 15000 and 25000 volts.  The bigger the screen, the higher the voltage.

When breaking a svreen, first earth one end of the probe to the chassis, then poke the business end under the rubber flange over the end of the HT lead where it meets the screen.  If the screen is live, it will discharge with a crack.  It is then safe to handle.

Remove the yoke, a good source of copper binding wire, and break the neck of the tube off with a hammer.  It is thin here and the safest place.  You can then saw up the tube with lapidary equipment, or a diamond blade on an angle grinder if you take precautions to avoid breathing the dust.

RegardFlash.
Yours Sincerely
Flash (Gordon)

roughcreations

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Re: TV glass toxicity?
« Reply #31 on: June 25, 2019, 07:26:30 PM »
Hi Makky,
Thanks for the welcome. I was on this forum lurking a few years ago, but my account got banned because I was sometimes behind a VPN, and the forum software doesn't like that, it automatically labelled me as a spammer, lol.
I am really interested in encoders after hearing from you about their application to faceting machines, and also now that I searched and found the relevant forum thread I understand the requirements a lot better.

I bought my trusty Facetron from the fine folks at Aussie Sapphire a few years back, the machine has an exposed moving pivot bolt on the side facing the user, the other end of the pivot bolt is covered with a block of alloy, housing the dial gauge etc. It seems like an encoder should be quite do-able, at least from first impressions and a thread for Facetron conversions might be quite a good resource given the number of owners of this brand on the forum. I am not in any great hurry, but it would be good to get an idea of the work involved for this make sometime in the next few months when time allows.

Yeah, the TV glass is a novelty I guess, but there's lots of other readily available gemstones out there that look even better when well cut (smoky quartz anyone?).

Cheers,
Laurie
(RoughCreations).

Ghost

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Re: TV glass toxicity?
« Reply #32 on: June 25, 2019, 07:37:46 PM »
I have a very nice piece of Toohey's Topaz that I cut from rough that was found on the roadside in Victor Harbor.

roughcreations

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Re: TV glass toxicity?
« Reply #33 on: June 25, 2019, 08:11:59 PM »
Shouldn't that be 'West End' topaz rather than Tooheys for S.A.? Spent a lot of time travelling the stretch of road between Goolwa and Victor in my earlier years.
I have this piece of Broad Arrow Pub amethyst I am pondering how to cut - it's actually the base of a beer glass..


« Last Edit: June 25, 2019, 08:15:04 PM by roughcreations »

MakkyBrown

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Re: TV glass toxicity?
« Reply #34 on: June 25, 2019, 10:37:38 PM »
Big low RI heart/trillion/pear. Three fold symmetry that is powerful at low RI. 
Like this, Gemray at RI 1.52 :) Chat in July about machine.CheersAndrew


« Last Edit: June 25, 2019, 10:40:00 PM by MakkyBrown »

Rusted

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Re: TV glass toxicity?
« Reply #35 on: June 26, 2019, 09:33:50 AM »
Broad arrow pub, that was an interesting place back in the day.

Could your purple beer glass actually be a part of a telegraph pole insulator?

roughcreations

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Re: TV glass toxicity?
« Reply #36 on: June 26, 2019, 11:56:26 AM »
Yes an interesting part of the world. I used to work in a gold mine south of Kalgoorlie back in the late eighties, however I didn't actually collect this piece myself - I was given it at lapidary club - it has some diamond saw cuts. I will ask the person who gave it to me what shape it was initially when I see them next. Here is another view:


MakkyBrown

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Re: TV glass toxicity?
« Reply #37 on: July 17, 2019, 10:22:29 PM »
Hey RCreations,I've just got sitting beside me a nice chuck of smashed glass bottle base with a very nice colour to it. Very similar colour to your piece, so next on the dop will be it. I'll practice what I preach so to speak and cut a nice big trillion from it.I'll also try and drop into the club Tuesday.
CheersAndrew

MakkyBrown

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Re: TV glass toxicity?
« Reply #38 on: July 17, 2019, 11:08:51 PM »
My bit of glass :)


MakkyBrown

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Re: TV glass toxicity?
« Reply #39 on: July 19, 2019, 08:53:54 PM »
Turned out really nice. I tried to take a good photo but failed, not having much luck with good photos. So I just took this with flash. It is slightly darker than the gem but not a bad representation of what it's like.

roughcreations

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Re: TV glass toxicity?
« Reply #40 on: July 20, 2019, 04:46:07 PM »
Wow, with a capital W!
I have been interstate for the school holidays with the family, missed lapidary club for the last few weeks and arrived back home today - just saw your post.
The photo looks amazingly good to me, but agree, faceted gems are the hardest things to photograph. Would love to see the stone in person some time!

roughcreations

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Re: TV glass toxicity?
« Reply #41 on: July 20, 2019, 04:52:26 PM »
Hi Makky,
Once again, I can't believe it's not a concave-cut with that scintillating performance. What sort of size and/or carat is it?

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