Thanks, I understand. Well I don't have a very high voltage in the Clocks... but it is a method - yes.
Dieter

----- Original Message ----- From: "David Forbes" <[email protected]>
To: <[email protected]>
Sent: Monday, June 09, 2014 6:30 PM
Subject: Re: [neonixie-l] Question on Z5660M Tubes- What kind of gas and age survival?


Dieter,

Another idea is to use a decimal point, if the tube has one, as a secondary anode for a very high voltage trigger pulse. This would work similar to the xenon flash tubes in cameras.


On 6/9/14 8:56 AM, Dieter Waechter wrote:
You all surely know the problem, that if a standard Nixie tube is off for a longer time, say 1 hour, and switched on at night, it takes some time (0.1 ... 3 seconds) until the glowing comes up.
Does anyone know a method to speed up the ignition in this condition?
I have found out that:
- higher voltage does not make a change
- higher target current does not make a change
- slew rate of the switch (means a sharp pulse) does not make a change
It looks like nothing helps to make it glow immediately.
All the best
Dieter


   ----- Original Message -----
   From: John Rehwinkel
   To: [email protected]
   Sent: Monday, June 09, 2014 5:37 PM
Subject: Re: [neonixie-l] Question on Z5660M Tubes- What kind of gas and age survival?


I don't think there would be any need to add helium, hydrogen, or even krypton-85 to *indicator* tubes.



Helium and hydrogen no, but some 5092s had Kr85 for rapid ionization for multiplexed use. Discussion on this list from 2010:


   https://groups.google.com/forum/#!topic/neonixie-l/cKkyRyaGOGI


   - John



--
David Forbes, Tucson AZ

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