I do have to hand out much credit to her. To be able to bend glass like
that, is a real art form.
Ira.
On 11/23/2024 10:33 AM, Miles Thatch wrote:
I'm not sure what is so dramatic about the bombarding process? Sure
it's high voltages, as one would expect with this sort of
manufacturing but if the young lady can do it with confidence, I don't
see why full grown men here can't.
On Saturday, November 23, 2024 at 12:49:13 PM UTC-5 Instrument
Resources of America wrote:
I saw bombarding being done. I sit here now shaking and shuddering
from the experience. Here is a fairly detailed video of neon sign
manufacturing. https://www.youtube.com/watch?v=kH635AEawGY The
bombarding process starts at about 12:30. The demonstration that I
saw, they deliberately drew a two foot arc just for show. It was
impressive, and S-C-A-R-R-Y. This may not help you with your
endeavors, but it is interesting, and mentions 'neon' a number of
times.
Ira.
On 11/22/2024 8:27 PM, gregebert wrote:
Several years ago I researched neon signage, and you need a
high-vacuum, around 1 micron (10-3 Torr). The books I have didn't
get into specific vacuum levels, as there are multiple ways to
cleanse the tubes, notably via bombarding. They did not cover
nixie tubes.
To get micron-level vacuum, you need a mechanical pump to get
around 100 microns, followed by a diffusion pump. There might be
other ways to get the required cleanliness without a diffusion
pump, but I dont have any details. If you just want to do some
experimenting, start with a mechanical pump. I plan to do that
soon, as I have a small pump used for evacuating air conditioning
equipment.
Some of the reasons I'm not doing neon work are the cost of the
equipment, the dangers of bombarding, need for mercury to extend
tube life, and I expect it to be difficult to find getter
material. All I want to do is get some sort of discharge glow,
and play around with easy-to-find gases like argon and helium.
I saw a mention in the Weston book of pressures in the 10-2 to
10-4 Torr, though it covers theory of operation rather than
fabrication details.
On Friday, November 22, 2024 at 12:33:28 PM UTC-8 Miles Thatch wrote:
vac.png
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