I distinctly remember some of Dalibor's first tubes from mnay years ago
when he first started experimenting.
He made one that looked a lot like this one. Nice Work!
Chuck
---- Original Message ----
From: "joshua dejaen" <dejaenjos...@gmail.com>
Sent: 10/24/2021 2:36:14 AM
To: "neonixie-l" <neonixie-l@googlegroups.com>
Subject: Re: [neonixie-l] Re: Homemade Purple Nixie Tube
Thanks for all the comments, sorry I could not reply sooner.
I have added mercury to glow tubes in the past but I have not wanted to
contaminate my new pump.
I could do it on my old pump but it is not able to pump below 1 torr
and the tube would be left with impurities.
My electrodes consist of copper welded to tungsten with a nickel buffer
and then the tungsten welded to nickel wire that forms the digits inside the
tube.
The tungsten forms the actual seal to the pyrex glass and the copper
provides a nice external lead.
I heat up the tube with the torch while pumping for about a minute and
let it pump under high(ish) vacuum (5-10 microns) for 30 min.
I then open the bleed valve and adjust the pressure until the glow
looks good and seal it off.
I also have made Triodes in the past and those require about 15 min
heating with the torch on the pump along with an hour of pumping.
On Wednesday, October 20, 2021 at 12:49:28 PM UTC-7
nickja...@gmail.com wrote:
I don't recall for certain if it was NeonJohn
or another guy, or even what group it was in. Could've been the old
geigercounterenthusiasts group on yahoo. This was some time ago, when we were
laughing about the insane overreaction to breakage of CFLs in school
classrooms. I've never tried opening a tube in a controlled fashion myself,
but have seen tiny droplets in broken ones, usually near the ends of the tube.
Been playing with glass laser tubes a little
the last week. Found that Gammex patient positioners used both red and green
HeNe before diodes took over. Got one that won't lase though the plasma tube
is a nice bright pink. It hisses or buzzes continuously but no beam output.
The PS is good as it lit up a couple of similar size d tubes last night when I
tried. I need to completely remove it and try sighting through the bore. It's
possible it's leaking and coming up in pressure slowly and is now dead. I was
looking at the metal evac/fill tube where it's crimped off and wondering about
the possibilities of re-gassing... I have a couple of those metal tube ends
with some defunct old tubes I got from Laser Sam a couple years back for
experimenting. More interests, less time...
On Wed, Oct 20, 2021 at 2:37 PM Mac Doktor
<themac...@gmail.com> wrote:
On Oct 20,
2021, at 2:59 PM, Nick Andrews <nickja...@gmail.com> wrote:
A guy
built a device to try and capture the mercury, thinking he could recover and
build up a small supply. He found that he never could get any significant
quantity from the tubes.
Did he condense the vapor first?
Terry Bowman, KA4HJH
"The Mac Doctor"
https://www.astarcloseup.com
“...the book said something astonishing, a very big thought. The stars,
it said, were suns but very far away. The Sun was a star but close up.”—Carl
Sagan, "The Backbone Of Night", Cosmos, 1980
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