Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Old November 24th 19, 10:42 PM posted to sci.electronics.repair,sci.electronics.design
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Default another vintage HV device finding challenge: LARGE plasma balls!

Ok, my previous post concerned the outlandish prices for some neat
looking HV devices originally from the late 90's: Luminglas discs. I
was successful finding several, and at good prices comparable to what I
would have paid in 2000 for some nice used ones. However.....

I have been on a new quest to try and find a large plasma ball. True,
they are all over the Internet, but the most common sizes seem to be 8"
diameter or less and I am looking for 12" diameter or more! However,
the price seems to increase maybe as much as 20 fold going from 8 to 12
inch size! I see some on eBay in 12" size for just under $200, but I'm
hoping to do better. Problem with the used ones I see is that the
sellers don't specify globe size and 99% most definitely are 8" or less
diameter.


Suggestions would be welcome. One thing I tried googling for was some
sort of a history on plasma globes with maybe larger ones from the past
mentioned. Other than Spencer's 12" Megavolt, that's all I could come
up with (and, incidentally, the person wants more for the Megavolt than
a new 12" one!).

Thank you.

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Old November 24th 19, 11:31 PM posted to sci.electronics.repair,sci.electronics.design
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Default another vintage HV device finding challenge: LARGE plasma balls!

On 11/24/19 4:42 PM, Branden wrote:
Ok, my previous post concerned the outlandish prices for some neat
looking HV devices originally from the late 90's: Luminglas discs.* I
was successful finding several, and at good prices comparable to what I
would have paid in 2000 for some nice used ones.* However.....

I have been on a new quest to try and find a large plasma ball.* True,
they are all over the Internet, but the most common sizes seem to be 8"
diameter or less and I am looking for 12" diameter or more!* However,
the price seems to increase maybe as much as 20 fold going from 8 to 12
inch size!* I see some on eBay in 12" size for just under $200, but I'm
hoping to do better.* Problem with the used ones I see is that the
sellers don't specify globe size and 99% most definitely are 8" or less
diameter.


Suggestions would be welcome.* One thing I tried googling for was some
sort of a history on plasma globes with maybe larger ones from the past
mentioned.* Other than Spencer's 12" Megavolt, that's all I could come
up with (and, incidentally, the person wants more for the Megavolt than
a new 12" one!).

Thank you.


The very large type you see in science museums and such are probably
custom jobs I don't think there's enough demand for globes of larger
size to make an industry of selling anything but one-offs.
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Old November 24th 19, 11:35 PM posted to sci.electronics.repair,sci.electronics.design
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Default another vintage HV device finding challenge: LARGE plasma balls!

On 11/24/19 5:31 PM, bitrex wrote:
On 11/24/19 4:42 PM, Branden wrote:
Ok, my previous post concerned the outlandish prices for some neat
looking HV devices originally from the late 90's: Luminglas discs.* I
was successful finding several, and at good prices comparable to what
I would have paid in 2000 for some nice used ones.* However.....

I have been on a new quest to try and find a large plasma ball.* True,
they are all over the Internet, but the most common sizes seem to be
8" diameter or less and I am looking for 12" diameter or more!
However, the price seems to increase maybe as much as 20 fold going
from 8 to 12 inch size!* I see some on eBay in 12" size for just under
$200, but I'm hoping to do better.* Problem with the used ones I see
is that the sellers don't specify globe size and 99% most definitely
are 8" or less diameter.


Suggestions would be welcome.* One thing I tried googling for was some
sort of a history on plasma globes with maybe larger ones from the
past mentioned.* Other than Spencer's 12" Megavolt, that's all I could
come up with (and, incidentally, the person wants more for the
Megavolt than a new 12" one!).

Thank you.


The very large type you see in science museums and such are probably
custom jobs I don't think there's enough demand for globes of larger
size to make an industry of selling anything but one-offs.


I'd perhaps talk to someone on the facility of a place like which has
one, might be able to at least find parts or who made theirs. I'd be
prepared to pay a few G at least for a two-foot diameter one or such....
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Old November 25th 19, 08:06 AM posted to sci.electronics.repair,sci.electronics.design
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Default another vintage HV device finding challenge: LARGE plasma balls!

bitrex wrote in
:

On 11/24/19 4:42 PM, Branden wrote:
Ok, my previous post concerned the outlandish prices for some
neat looking HV devices originally from the late 90's: Luminglas
discs.* I was successful finding several, and at good prices
comparable to what I would have paid in 2000 for some nice used
ones.* However.....

I have been on a new quest to try and find a large plasma ball.*
True, they are all over the Internet, but the most common sizes
seem to be 8" diameter or less and I am looking for 12" diameter
or more!* However, the price seems to increase maybe as much as
20 fold going from 8 to 12 inch size!* I see some on eBay in 12"
size for just under $200, but I'm hoping to do better.* Problem
with the used ones I see is that the sellers don't specify globe
size and 99% most definitely are 8" or less diameter.


Suggestions would be welcome.* One thing I tried googling for
was some sort of a history on plasma globes with maybe larger
ones from the past mentioned.* Other than Spencer's 12"
Megavolt, that's all I could come up with (and, incidentally, the
person wants more for the Megavolt than a new 12" one!).

Thank you.


The very large type you see in science museums and such are
probably custom jobs I don't think there's enough demand for
globes of larger size to make an industry of selling anything but
one-offs.


https://www.metalsphere.com/product/...m-half-sphere/


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