[neonixie-l] Wanted: best few photos of Nixies in military equipment

[JohnK]

I would like to get a few good pictures of Nixies in military equipment [not 
expecting it to be mobile stuff].Preferably not generally available test 
equipment but could be support equipment in the Defence industry.
Can anyone point to their favourites please?

John Kaesehagen
Australia

-- 
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/DEABD6D6B72248B394292A70C8135B3E%40compunet4f9da9.
For more options, visit https://groups.google.com/d/optout.

Re: [neonixie-l] Re: In18 displaying cathode poisoning after 1000hrs or less.

[Trumpeter]

Are you saying the helium from leaking balloon can damage these tubes? My kids 
have a couple in the living room now.

Directed to the community at large: 

I am in search of a spare set of tubes, is it recommended to buy tubes from 
89-93ish? These have a lower failure rate?  Short of messaging sellers out of 
the blue with this request I do not see these listed in that way (by dates).

-- 
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/6064c1df-9202-439a-86ed-da277207ae70%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[neonixie-l] Re: FS: IV-4, IV-12, IV-17, IV-26

[Yuriy Ovchinnikov]

Actual list:

Cathode ray tubes

3LO1I – 72 pcs. for $15,

6LO1I – 104 pcs.,

8LO4I – 11 pcs.,

8LO29I – 47 pcs. for $20,

8LO30I – 1 pc. for $100,

8LO39V – 20 pcs. for $20,

10LO2I – 18 pcs.

13LМ31V – 7 pcs.,

13LO6I – 7 pcs. for $30,

13LO18V – 1 pc.,

13LO37I – 1 pc.,

16LO2V – 1 pc.,

16LO2I – 1 pc.,
18LМ5V – 1 pc.

IV-1 – 39 pcs. for $0.6,
IV-3A – 142 pcs. for $0.8,

IV-4 – 135 pcs. for $2,
IV-4 used – 101 pcs. for $1,
IV-6 – 126 pcs. for $0.8,
IV-6 used – 19 pcs. for $0.5,
IV-8 – 191 pcs. for $0.8,

IV-11 – 120 pcs. for $1,
IV-11 used – 4 pcs. for $0.5,
IV-12 – 390 pcs.,
IV-17 – 66 pcs. for $1.5,
IV-20 – 2 pcs. for $20,

IV-22 – 87 pcs. for $0.5,
IV-26 – 500 pcs. for $2,
IV-28А – 1 pcs. for $5,
IVL-1-7/5 – 2 pcs. for $10,

IVL-2-7/5 – 24 pcs. for $1.5,

IVLShU-1-11/2 – 39 pcs. for $5,

IN-1 – 360 pcs. for $1,

IN-2 – 30 pcs. for $1.8,
IN-3 – 199 pcs. for $0.5,

IN-7 – 78 pcs. for $1

IN-7A – 57 pcs. for $1

IN-7B – 88 pcs, for $1
IN-9 used – 11 pcs. for $3,

IN-12A – 42 pcs. for $2,

IN-12B – 1 pcs. for $2,

IN-13 – 1 pcs. for $3,
IN-14 used – 295 pcs. for $2.5,

IN-15А – 19 pcs. for $1,
IN-15B – 14 pcs. for $1,

IN-16 – 38 pcs. for$5

IN-16 used – 288 pcs. for $2.5

IN-17 – 25 pcs. for $3,

IN-17 used – 6 pcs. for $1.5,

Sockets for IN18, IN4, IN7 - 56 pcs. for $2.5

IN-19A used – 1 pc. for $1.5,

IN-19B used – 1 pc. for $1.5,

IN-19V – 2 pcs. for $2,

IN-28 – 83 pcs. for $3

Z560M WF – 4 pcs. for $3
Z570M used – 22 pcs. for $3

четверг, 10 сентября 2015 г., 7:39:43 UTC+3 пользователь Yuriy Ovchinnikov 
написал:
>
> FS: 
> IV-4 - 11 pcs., 
> IV-12 - 73 pcs., 
> IV-17 - 13 pcs., 
> IV-26 - more 800 pcs.
> Anyone want?
>

-- 
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/d455e94d-2c16-4717-92ae-4f3a3db22cc9%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Re: [neonixie-l] Re: In18 displaying cathode poisoning after 1000hrs or less.

[NeonJohn]

On 02/20/2017 11:44 AM, John Rehwinkel wrote:

> Both effects happen: the neon and argon leak out because even though
> they're at lower than atmospheric pressure, they're higher than the
> partial pressure of neon and argon outside the tube.  And, more
> intuitively, oxygen and nitrogen leak in.  Both of these effects are
> detrimental to the tube's operation.

Yes.  The uber-killer, though is helium.  It goes through soft glass
like water through a paper towel.

At one nuclear plant where I was setting up their radiation monitoring
system, I suddenly started losing photomultiplier tubes in liquid and
gas monitors.  I traced the problem down to another contractor doing
helium leak tests on the monitors (why? they operate at atmospheric
pressure) and instead of the normal procedure of hooking the mass spec
up to the detector and then flooding the monitor with helium, they were
pressurizing the detection chamber and sniffing with a probe connected
to the leak detector.

I'm talking about exposure of just a few minutes.

> 
> Old-style frit (or "soft") seal helium-neon laser tubes have a
> similar problem.  The helium (a very slippery gas) would slowly leak
> out through the seals, so although the tube would still ionize and
> glow, laser action wasn't supported.  The cure is surprisingly
> simple: "soak" the tubes in a trash bag with helium in it at
> atmospheric pressure.  With the reversed (and much larger) partial
> pressure difference of helium, a few years' loss could be restored in
> a few days.  The normal setup was to leave the tube running and
> monitor the laser output.  It would slowly rise, then begin to drop
> when the helium pressure began to get too great.  Take the tube out
> of the bag then and you could get a few more years out of it.

I've done several of those.  Amazing how fast the He goes back in.

> 
> In short, you don't need a hyperbaric chamber, atmospheric pressure
> will probably suffice, but you'd want to have the proper ratio of
> gases.

Just heat-seal the tubes in metallized mylar bags, the same stuff that
modern helium balloons are made of.

And keep helium out of your house!  No helium balloons or whatnot.

I'll bet that if one did a spectroscopic analysis on the light coming
from a weak tube, one would see He in the mix.

John


-- 
John DeArmond
Tellico Plains, Occupied TN
http://www.tnduction.com<-- THE source for induction heaters
http://www.neon-john.com<-- email from here
http://www.johndearmond.com <-- Best damned Blog on the net
PGP key: wwwkeys.pgp.net: BCB68D77

-- 
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/c736a2e9-7d09-494b-cff5-53fca0e2054f%40neon-john.com.
For more options, visit https://groups.google.com/d/optout.

Re: [neonixie-l] Re: In18 displaying cathode poisoning after 1000hrs or less.

[John Rehwinkel]

> Read-up on Paschen's Law, which can explain why a leaky tube is harder to 
> ionize after it's pressure starts to increase.
> 
> I wonder if we should store our nixies in a hyperbaric chamber with 
> neon/argon.

Both effects happen: the neon and argon leak out because even though they're at 
lower than atmospheric pressure, they're higher than the partial pressure of 
neon and argon outside the tube.  And, more intuitively, oxygen and nitrogen 
leak in.  Both of these effects are detrimental to the tube's operation.

Old-style frit (or "soft") seal helium-neon laser tubes have a similar problem. 
 The helium (a very slippery gas) would slowly leak out through the seals, so 
although the tube would still ionize and glow, laser action wasn't supported.  
The cure is surprisingly simple: "soak" the tubes in a trash bag with helium in 
it at atmospheric pressure.  With the reversed (and much larger) partial 
pressure difference of helium, a few years' loss could be restored in a few 
days.  The normal setup was to leave the tube running and monitor the laser 
output.  It would slowly rise, then begin to drop when the helium pressure 
began to get too great.  Take the tube out of the bag then and you could get a 
few more years out of it.

In short, you don't need a hyperbaric chamber, atmospheric pressure will 
probably suffice, but you'd want to have the proper ratio of gases.

- 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.
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/31C73C8F-B8DC-41DA-8A9A-301341F36960%40mac.com.
For more options, visit https://groups.google.com/d/optout.

[neonixie-l] Completed clock...

[Paul Andrews]

Hi,

Finally finished messing with my GRA arduino shield clock. The shield 
is completely pre-assembled. However I re-wrote the software, added a WiFi 
interface (to set the time and control the clock) and built the case (I 
used pololu.com to get the acrylic cut). This was all new to me, so it was 
a great learning experience. Next stop is to build my own clock from the 
ground up, except maybe the PSU for now. Anyhow, here is a piccie:



-- 
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/efa89c5b-388f-46bf-b89c-47d99d01706b%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[neonixie-l] Re: In18 displaying cathode poisoning after 1000hrs or less.

[Dekatron42]

In tubes, filled with Neon and other gases, with shiny copper pieces you 
can see that these copper pieces become darker and darker (black) the more 
air that has entered the tube, the tube can work just as designed for a 
long time while this process is ongoing but it will sooner or later give up.

/Martin

-- 
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/3b2817ac-2bad-4693-9e25-89ea268be1a1%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[neonixie-l] Re: In18 displaying cathode poisoning after 1000hrs or less.

[Paul Andrews]

I would expect that a leaky tube would be suffering from contamination. 
This wiki article is a good description of how these tubes 
work: https://en.wikipedia.org/wiki/Gas-filled_tube#Gas_purity

On Saturday, February 18, 2017 at 10:11:43 PM UTC-5, Trumpeter wrote:
>
> Hello all,
>
> I have what was a nos set of tubes in a spectrum 18, running at 170v. At 
> least two tubes display incomplete digits.  I have the PIR sensor installed 
> it may be even less than 1000 hours.  Could I be doing something wrong or 
> just a bad batch of tubes?  They are all the same date code.
>

-- 
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/ab194571-ef07-4767-8dec-b03c0d03baed%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.