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what is this high voltage display device called?
What I'm thinking of is not a plasma globe, although, like the globe, it
too is intended primary for display. If I were to describe it, I remember it being made out of glass, maybe 1-2 feet in diameter, and nearly flat in thickness. Electric discharges from the center to the edge of the glass and looked a lot like lightning. I remember these devices being used in Star Trek The Next Generation used behind the heads of Borg drones. They used to be in Spencers too available for purchase. |
what is this high voltage display device called?
On 11/17/19 7:27 PM, Branden wrote:
What I'm thinking of is not a plasma globe, although, like the globe, it too is intended primary for display.Â* If I were to describe it, I remember it being made out of glass, maybe 1-2 feet in diameter, and nearly flat in thickness.Â* Electric discharges from the center to the edge of the glass and looked a lot like lightning.Â* I remember these devices being used in Star Trek The Next Generation used behind the heads of Borg drones.Â* They used to be in Spencers too available for purchase. Here's an image: https://i.imgur.com/72YjfM9.jpg |
what is this high voltage display device called?
On 11/17/19 7:27 PM, Branden wrote:
What I'm thinking of is not a plasma globe, although, like the globe, it too is intended primary for display.Â* If I were to describe it, I remember it being made out of glass, maybe 1-2 feet in diameter, and nearly flat in thickness.Â* Electric discharges from the center to the edge of the glass and looked a lot like lightning.Â* I remember these devices being used in Star Trek The Next Generation used behind the heads of Borg drones.Â* They used to be in Spencers too available for purchase. Ok, I found it. Luminglas or plasma plate or plasma disk. Wow, they are really costly now. The ones in Spencer's 20 years ago were around $40 for 15 inch size... now it looks like at least 3 times that! |
what is this high voltage display device called?
On Sun, 17 Nov 2019 21:16:17 -0500, Branden wrote:
Ok, I found it. Luminglas or plasma plate or plasma disk. Wow, they are really costly now. The ones in Spencer's 20 years ago were around $40 for 15 inch size... now it looks like at least 3 times that! Inflation innit. A price tripling over 20 years doesn't seem that unlikely. -- This message may be freely reproduced without limit or charge only via the Usenet protocol. Reproduction in whole or part through other protocols, whether for profit or not, is conditional upon a charge of GBP10.00 per reproduction. Publication in this manner via non-Usenet protocols constitutes acceptance of this condition. |
what is this high voltage display device called?
On Sun, 17 Nov 2019 19:27:27 -0500, Branden
wrote: What I'm thinking of is not a plasma globe, although, like the globe, it too is intended primary for display. If I were to describe it, I remember it being made out of glass, maybe 1-2 feet in diameter, and nearly flat in thickness. Electric discharges from the center to the edge of the glass and looked a lot like lightning. I remember these devices being used in Star Trek The Next Generation used behind the heads of Borg drones. They used to be in Spencers too available for purchase. An ordinary clear-glass incendescent bulb makes some nice sparks inside if you apply HF-HV to one side of the filament. -- John Larkin Highland Technology, Inc lunatic fringe electronics |
what is this high voltage display device called?
On 18/11/19 13:45, Cursitor Doom wrote:
On Sun, 17 Nov 2019 21:16:17 -0500, Branden wrote: Ok, I found it. Luminglas or plasma plate or plasma disk. Wow, they are really costly now. The ones in Spencer's 20 years ago were around $40 for 15 inch size... now it looks like at least 3 times that! Inflation innit. A price tripling over 20 years doesn't seem that unlikely. Much too high. In the UK, inflation from 1999 to 2019 accounted for a price rise of about 72%. https://www.officialdata.org/uk/inflation/1999?amount=1 You have to go back to 1985 for inflation to triple the value in 2019. -- Jeff |
what is this high voltage display device called?
On 11/18/19 12:31 PM, Jeff Layman wrote:
On 18/11/19 13:45, Cursitor Doom wrote: On Sun, 17 Nov 2019 21:16:17 -0500, Branden wrote: Ok, I found it.Â* Luminglas or plasma plate or plasma disk.Â* Wow, they are really costly now.Â* The ones in Spencer's 20 years ago were around $40 for 15 inch size... now it looks like at least 3 times that! Inflation innit. A price tripling over 20 years doesn't seem that unlikely. Much too high. In the UK, inflation from 1999 to 2019 accounted for a price rise of about 72%. https://www.officialdata.org/uk/inflation/1999?amount=1 You have to go back to 1985 for inflation to triple the value in 2019. Looks like I should have bought one at the time. There's now way I'll shell out 4x for it now. Oh well. |
what is this high voltage display device called?
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what is this high voltage display device called?
On Mon, 18 Nov 2019 11:49:12 -0800, John Larkin wrote:
No, I meant an ordinary light bulb. John means a lightbulb with a tungsten filament in it which burns very brightly when a current is passed through it. You have to have attained great age, like John and I, in order to remember such obsolete atrocities. -- This message may be freely reproduced without limit or charge only via the Usenet protocol. Reproduction in whole or part through other protocols, whether for profit or not, is conditional upon a charge of GBP10.00 per reproduction. Publication in this manner via non-Usenet protocols constitutes acceptance of this condition. |
what is this high voltage display device called?
On Mon, 18 Nov 2019 20:17:16 -0000 (UTC), Cursitor Doom
wrote: On Mon, 18 Nov 2019 11:49:12 -0800, John Larkin wrote: No, I meant an ordinary light bulb. John means a lightbulb with a tungsten filament in it which burns very brightly when a current is passed through it. You have to have attained great age, like John and I, in order to remember such obsolete atrocities. But don't heat the filament, just apply a lot of high voltage, high frequency stuff to it. -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com |
what is this high voltage display device called?
On 11/18/19 3:20 PM, John Larkin wrote:
On Mon, 18 Nov 2019 20:17:16 -0000 (UTC), Cursitor Doom wrote: On Mon, 18 Nov 2019 11:49:12 -0800, John Larkin wrote: No, I meant an ordinary light bulb. John means a lightbulb with a tungsten filament in it which burns very brightly when a current is passed through it. You have to have attained great age, like John and I, in order to remember such obsolete atrocities. But don't heat the filament, just apply a lot of high voltage, high frequency stuff to it. Yes, Ive applied clear incandescents to a HV source too! It can produce a different display from an actual plasma globe depending on bulb vacuum or type of gas used. One has to be very careful of the 25 watt incandescents though if applied to high voltage. Some of those used to produce x-rays because they were vacuumed but not backfilled! I think manufacturers have corrected this nowadays, but 20 years ago they were not backfilled. |
what is this high voltage display device called?
On 18.11.19 21:20, John Larkin wrote:
On Mon, 18 Nov 2019 20:17:16 -0000 (UTC), Cursitor Doom wrote: On Mon, 18 Nov 2019 11:49:12 -0800, John Larkin wrote: No, I meant an ordinary light bulb. John means a lightbulb with a tungsten filament in it which burns very brightly when a current is passed through it. You have to have attained great age, like John and I, in order to remember such obsolete atrocities. But don't heat the filament, just apply a lot of high voltage, high frequency stuff to it. Like putting one in the microwave. To protect the microwave, also put a glass of water inside. The lamp does not need to be in working order. |
what is this high voltage display device called?
Part of that price is the size. If you must have a 15" disk, it's going to
cost you. 6" are about $25 to $30. -- Paul Hovnanian ------------------------------------------------------------------ The large print giveth and the small print taketh away. -- Tom Waits |
what is this high voltage display device called?
On 11/17/19 7:27 PM, Branden wrote:
What I'm thinking of is not a plasma globe, although, like the globe, it too is intended primary for display.Â* If I were to describe it, I remember it being made out of glass, maybe 1-2 feet in diameter, and nearly flat in thickness.Â* Electric discharges from the center to the edge of the glass and looked a lot like lightning.Â* I remember these devices being used in Star Trek The Next Generation used behind the heads of Borg drones.Â* They used to be in Spencers too available for purchase. Just wanted to update that I now actually have thee of the Luminglas displays! Although eBay prices are out of this world, I found all of these either on Facebook Marketplace or Craigslist and all for less than $50 each. A lot more reasonably priced! I remember them charging anywhere from $25-50 back in the late 90's early 00's when they were in Spencer's and elsewhere. If they are indeed collector items now, I may have three chances in the future to sell if I ever grow tired of them. |
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