collapse

Author Topic: TV glass toxicity?  (Read 1504 times)

FlashGP

  • ALF'er Platinum
  • *
  • Posts: 477
    • View Profile
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

  • ALF'er Bronze Member
  • *
  • Posts: 8
    • View Profile
    • Email
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

  • ALF'er Platinum
  • *
  • Posts: 440
    • View Profile
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

  • ALF'er Bronze Member
  • *
  • Posts: 8
    • View Profile
    • Email
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

  • Global Moderator
  • ALF'er VIP
  • *****
  • Posts: 1070
    • View Profile
    • Email
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

  • ALF'er Platinum
  • *
  • Posts: 371
    • View Profile
    • Email
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

  • ALF'er Bronze Member
  • *
  • Posts: 8
    • View Profile
    • Email
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

  • Global Moderator
  • ALF'er VIP
  • *****
  • Posts: 1070
    • View Profile
    • Email
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

  • Global Moderator
  • ALF'er VIP
  • *****
  • Posts: 1070
    • View Profile
    • Email
Re: TV glass toxicity?
« Reply #38 on: July 17, 2019, 11:08:51 PM »
My bit of glass :)


Tags:
 

* Sponsor

HTML Online Editor Sample

ALF is hosted by Aussie Sapphire as a free service to the Lapidary community.

Visit our website here
Phone 1800 50 21 40
Or find us on Facebook

Recent Activities

Faceting Designs Book by scratchie
[Today at 02:45:50 PM]


TV glass toxicity? by MakkyBrown
[July 17, 2019, 11:08:51 PM]


ebay - plans for 16" saw...... by MakkyBrown
[July 17, 2019, 10:58:06 PM]


Broome earthquake by Jamo
[July 16, 2019, 09:29:36 PM]


Replacement stones for ring by Gerda
[July 15, 2019, 08:25:30 PM]


Advice needed on the Hall Xtra faceting machine by Glenn
[July 12, 2019, 08:19:37 AM]


1500 Carat Rough Emerald by Orange Pirate
[July 11, 2019, 06:03:31 PM]


Can anyone id this facet head? by roughcreations
[July 10, 2019, 10:23:22 AM]


Joke of the Day by starsapphire78
[July 08, 2019, 11:56:44 PM]


Threaded Shafts by Rusted
[July 08, 2019, 12:33:37 PM]


My new blog and You Tube channel information by Findem
[June 26, 2019, 02:24:29 PM]


Stepper motors Fantasy machines by MakkyBrown
[June 25, 2019, 10:44:42 PM]

* Calendar

July 2019
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 [19] 20
21 22 23 24 25 26 27
28 29 30 31

* Who's Online

  • Dot Guests: 91
  • Dot Hidden: 0
  • Dot Users: 1
  • Dot Users Online:

* Find us on Facebook

* Forum Stats

  • stats Total Members: 4061
  • stats Total Posts: 54776
  • stats Total Topics: 5845
  • stats Total Categories: 6
  • stats Total Boards: 27
  • stats Most Online: 186