Re: [neonixie-l] Used or NOS?

[Instrument Resources of America]

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

--
You received this message because you are subscribed to the Google 
Groups "neonixie-l" group.
To unsubscribe from this group and stop receiving emails from it, send 
an email to neonixie-l+unsubscr...@googlegroups.com 
<mailto:neonixie-l+unsubscr...@googlegroups.com>.
To post to this group, send email to neonixie-l@googlegroups.com 
<mailto:neonixie-l@googlegroups.com>.
To view this discussion on the web, visit 
https://groups.google.com/d/msgid/neonixie-l/4dde53a3-7777-46ad-adda-5fbcf295fcf0%40googlegroups.com 
<https://groups.google.com/d/msgid/neonixie-l/4dde53a3-7777-46ad-adda-5fbcf295fcf0%40googlegroups.com?utm_medium=email&utm_source=footer>.
For more options, visit https://groups.google.com/d/optout.

--
You received this message because you are subscribed to the Google Groups 
"neonixie-l" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to neonixie-l+unsubscr...@googlegroups.com.
To post to this group, send an email to neonixie-l@googlegroups.com.
To view this discussion on the web, visit 
https://groups.google.com/d/msgid/neonixie-l/56E8834B.4080303%40HUGHES.NET.
For more options, visit https://groups.google.com/d/optout.
<<attachment: IRACOSALES.vcf>>