[yes, my link included one of those too. Maybe the "see also" is a little
buried.]
jk
----- Original Message -----
From: "Marcin Adamski" <marcin.r.adam...@gmail.com>
To: <neonixie-l@googlegroups.com>
Sent: Wednesday, March 16, 2016 2:32 PM
Subject: Re: [neonixie-l] Used or NOS?
Have no answer, except that if they wanted to have a good vacuum why not
to use getter. But why do they needed the vacuum envelope at all? There is
a version of this stabilizer without the envelope. Just four tubes packed
into a single base: http://www.radiomuseum.org/tubes/tube_zz1031.html
Marcin
On 16-Mar-16 14:47, JohnK wrote:
OK... so why a getter in this one? All the little NEON tubes are each
already sealed.
http://www.tubecollector.org/zz1030.htm
John K
----- Original Message -----
*From:* Instrument Resources of America
<mailto:iracosa...@hughes.net>
*To:* neonixie-l@googlegroups.com
<mailto:neonixie-l@googlegroups.com>
*Sent:* Wednesday, March 16, 2016 8:18 AM
*Subject:* Re: [neonixie-l] Used or NOS?
As I mentioned in an earlier post today getters are flashed inside
of 'VACUUM TUBES' to absorb residual 'OXYGEN' after pump down, and
possibly some external R.F. heating of the internal elements to
further degas. OXYGEN is extremely detrimental to 'hot cathodes',
and 'hot filaments', and will destroy both quite quickly, even in
small quantities. Ira.
On 3/15/2016 10:23 AM, Nick wrote:
Why would they have a getter? An Hg pill that needs to be
vaporized, sure. But a getter? They are used to remove any stray
gas molecules given off by the glass or internal structures due to
heat & time.
Nixies are gassed tubes by definition - a getter would be
counter-productive - even during baking and initial evacuation
prior to backfilling, you wouldn't use a getter.
Nick
On Monday, 14 March 2016 01:15:28 UTC, jrehwin wrote:
Nixies are not vacuum tubes - they shouldn't have a getter.
Actually, some nixies do have a getter, but it's a different
kind of getter than vacuum tubes use, naturally. Most of the
ones with getters use "pill" getters, often on the back of the
anode, and there's normally no "getter flash" on the glass.
http://www.tubeclockdb.com/images/stories/2012/in-18-bd/in-18-nixie-clock-6.jpg
<http://www.tubeclockdb.com/images/stories/2012/in-18-bd/in-18-nixie-clock-6.jpg>
- John
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