Hi,
but where do you get the mercury dispenser? Do you have a source? I am
just curious because I searched for it some months ago and did not find any.
But Ron is probably right: Many Nixie tubes neither have getters nor
mercury in there, so the bakeout really is the crucial part.
Jens
Mercury + stainless steel cathode are the best combination for the
longest lifetime of the tube. Another possibility is to use molybdenum
cathode, but it is not easy to obtain (0.1mm shim), I dont know how to
etch it, it is quite brittle to work with and difficult to spotweld to
lead-in-wires. I will fill mercury by mercury dispenser - metal
compound, activated by heating, this procedure relieve the mercury..
Similar to flashing the getters,
Dalibor
2012/6/26 glasslinger <[email protected] <mailto:[email protected]>>
Good reason for not using mercury in your tubes! Pick a low
sputter cathode metal so it isn't necessary. Also, getters are not
really necessary in tubes operating at nixie tube pressures. Just
do a good bakeout and you will be fine.
ron
On Tuesday, June 26, 2012 5:09:26 AM UTC-7, Dalibor wrote:
Important info! Thanks for that!
Dalibor
2012/6/26 Alek onet <[email protected]
<mailto:[email protected]>>
Flashes getters aren't good for nixie tubes because barium
mirror exchange mercury vapours to another gases. That's why.
Best regards
Alek
W dniu 2012-06-26 09:51, Dalibor Farný pisze:
Thats exactly what I mean, I will use flashed getter for
testing - I will disassemble some old TV tube as Ron
suggested. But I want to use right getter later..
Do You have any info about your progress on your site?
Dalibor
2012/6/26 jb-electronics <[email protected]
<mailto:[email protected]>>
Hi folks,
the only tube with a flashed getter I know of is the
XN-1:
http://www.tube-tester.com/sites/nixie/data/XN1/XN1.htm
To be honest: I will not use getters at the moment.
There is so much glasswork to figure out for me, that
is the part that I will focus on in the next months. :-)
Jens
Hi Dylan,
flashed getters are not used in nixies (I havent
seen it at least), just some VFD tube use flashed
getters. Flashed getters leave a coating on a glass
envelope of the tube - we don't want that. I think
that kind of getter needs only initial activation by
heat which could be done by induction heating as
well as in the case of flashed getters. Look to
IN-14 nixie, there is exactly the same pellet.
The only matter to solve will be attaching the
pellet to a wire, but I think that will be possible
to do by spot welding - inspired by IN-14.
Thanks,
Dalibor
2012/6/26 dylan roelofs <[email protected]
<mailto:[email protected]>>
Hey Dalibor and others-
I don't feel that these are the right getters
for nixie tubes.
The literature lists them as thermally
active- they only absorb if you put them
somewhere hot.
Many styles of getters are made this way;
most tubes do run quite hot, beacuse of the
filaments..
There isn't anywhere in a nixie tube that is
constantly 100C-200C. (That's part of the magic
of nixies, of course)
You really want some flashed barium getters;
they absorb gasses at any temperature.
-Dylan
www.dylankehderoelofs.com
<http://www.dylankehderoelofs.com>
On Monday, June 25, 2012 11:21:36 AM UTC-7,
Dalibor wrote:
Hello guys,
I've got an offer on getters, tech info
attached.. the price is approx. 5pcs/1 eur.
Is anyone interested in it? I will place an
order in several weeks, I may send some
pieces sealed in argon filled tube..
--
Dalibor Farny
http://dalibor.farny.cz
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