Re: [neonixie-l] Noble gas 'Neon' Chemical Sympols

[Jeff Walton]

Lots of basements with radon to spare...  Too bad you can't collect that. 

 Original message 
From: A_Nonamus  
Date: 3/26/2016  10:17 PM  (GMT-06:00) 
To: neonixie-l  
Subject: Re: [neonixie-l] Noble gas 'Neon' Chemical Sympols 

I understand that with a half-life of 3.8 days, getting a discharge tube of any 
appreciable size full of it would be problematic to put it mildly. But is it 
possible to closely mimic its spectrum and thus make a "simulated" radon tube?

On Saturday, March 26, 2016 at 11:10:28 AM UTC-7, NeonJohn wrote:I did leave Rn 
out but not unintentionally.  I'm not sure enough Rn has

ever been collected in one spot to fill the letters Rn.  If that was

possible and the contents added to the tubing, viewing the "Rn" would be

your dying wish!




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Re: [neonixie-l] Noble gas 'Neon' Chemical Sympols

[A_Nonamus]

I understand that with a half-life of 3.8 days, getting a discharge tube of 
any appreciable size full of it would be problematic to put it mildly. But 
is it possible to closely mimic its spectrum and thus make a "simulated" 
radon tube?

On Saturday, March 26, 2016 at 11:10:28 AM UTC-7, NeonJohn wrote:
>
> I did leave Rn out but not unintentionally.  I'm not sure enough Rn has 
> ever been collected in one spot to fill the letters Rn.  If that was 
> possible and the contents added to the tubing, viewing the "Rn" would be 
> your dying wish!
>

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[neonixie-l] Re: Early ZM1000 nixie failure

['marta_kson' via neonixie-l]

Can You see if the mercury giver has released it's content? Did the failed 
tube show any sign of a different color? I have a Telefunken ZM1210 where 
the giver has not melted as it should. That tube lights up in a much more 
reddish color than the OK ones. If there was an overcurrent or too long 
time slot for just that tube of any significance it should have been so 
much brighter that You had noticed something was wrong.

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Re: [neonixie-l] Early ZM1000 nixie failure

[sture nystrom]

I had a similar massive darkening on a IN-14 tube some years ago. Repalced
tube and it have working good since then. I supposed air have come inside
tube.

Sture

2016-03-26 8:29 GMT+01:00 franetic :

> Hi all,
>
> can anybody (of more experienced builders) explain extreme darkening of a
> (then new/unused) ZM1000 nixie tube in just 3 months? The failed nixie was
> used in a clock in the minutes position. (The clock is a multiplexed 2x2
> design, 10mA peak current at 25% duty cycle - this hits the average 2.5mA
> cathode current.) I've built a few of these clocks, and have never seen a
> ZM1000 fail like this. (I also use that clock at home and another one at my
> office, they have been running for years with a little silvering at the
> bottom and only slightly noticeable darkening.) One thing that I noticed is
> that the failed nixie has the anode grid cage quite a bit more out of place
> than usual. Could this be the culprit?
>
> Thanks,
> Damir
>
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Re: [neonixie-l] Noble gas 'Neon' Chemical Sympols

[NeonJohn]

I did leave Rn out but not unintentionally.  I'm not sure enough Rn has
ever been collected in one spot to fill the letters Rn.  If that was
possible and the contents added to the tubing, viewing the "Rn" would be
your dying wish!

Of course, one could sprinkle some Pb-210 into the tube.  That's the
first Radon daughter with a useful half-life (about 22 years.)

That would actually work pretty well, as the remaining daughters decay
with either beta or alpha particles.  Both are good for stimulating
phosphors and neither will penetrate the glass, though a little
Bremsstrahlung X-rays will be produced from the beta particles.

Of course, the tube would not fill with a uniform glow.  There would be
bright speckles everywhere a particle of Pb-210 landed.

John


On 03/26/2016 01:57 PM, gregebert wrote:
> I think you mean Rn (Radon), rather than Ra (Radium).
> 
> 

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Re: [neonixie-l] Noble gas 'Neon' Chemical Sympols

[John Rehwinkel]

> I think you mean Rn (Radon), rather than Ra (Radium).

You're right, I realized it after I posted it.

- John

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Re: [neonixie-l] Noble gas 'Neon' Chemical Sympols

[gregebert]

I think you mean Rn (Radon), rather than Ra (Radium).


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Re: [neonixie-l] Noble gas 'Neon' Chemical Sympols

[John Rehwinkel]

> Please can somebody trell me where to get those 'neon'-letter chemical 
> symbols of noble gases ? I gXeot the symbols for He, Kr and Xe, but are 
> missing just those  for Ne and Ar. Futher tha He symbol is told me to be 
> outgassed.

I'm guessing you're also missing Ra, but so is everybody else :).

Those letters are available from Max Whitby at

http://www.periodictable.co.uk/ 

and Jürgen Bauer at

http://www.smart-elements.com/ 

- John


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[neonixie-l] Re: Early ZM1000 nixie failure

[Jon]

A couple of possibilities to think about... Either you've got a rogue tube 
where there is some manufacturing flaw that is markedly increasing 
sputtering. Or there's a problem with the clock circuit which is allowing a 
significant over-current through that tube specifically - maybe a current 
limiting resistor is not the value that it should be (wrong component 
picked out of the parts bin?).

Without seeing the circuit for the clock, I can't judge whether the second 
explanation is possible.

Jon.

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Re: [neonixie-l] Trying to Locate Nixie Vendor

[Nicholas Stock]

He has a habit of going off of the reservation for prolonged periods of
time...

I've given up buying his stuff...

On Fri, Mar 25, 2016 at 6:03 AM, Dwayne Johnson 
wrote:

> I had a short email exchange with him on March 6th about the numiqueen.
> On Mar 25, 2016 3:22 AM, "Jeff Walton"  wrote:
>
>>
>> Anyone here had contact recently with Juergen Grau?  ("Mr. Nixie" - runs
>> nixiekits.eu)
>>
>> Have been unsuccessfully trying to contact him for over a month and I'm
>> hoping that he is just on a long vacation and nothing more.  Anyhow, with
>> as many people as in this community I was hoping for some help reaching him.
>>
>> Thanks!
>>
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