[neonixie-l] Re: Need tubes (not nixies)

[Terry S]

Another round of "donations" came in, so here is the remaining tubes-needed 
list:

https://drive.google.com/open?id=1DtdgOvIt_xiGNHTznJnN7PcEZr1qMR9Z

Down to about 35 part numbers!

Terry


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Re: [neonixie-l] Re: 26 In18 Tubes

[Dan Hollis]

Corrosion isn't necessarily a problem. Though it indicates they may have 
been stored outside where extreme thermal cycling over time might have 
caused the pins to lose seal.


I have had a few tubes die due to stress on the pins from repeated 
insertions.


-Dan

On Mon, 2 Apr 2018, Jeff Aylesworth wrote:


I don' know the history on them at all, I rescued them from a garage sale
in my neighborhood. The pins do seem to have a little corrosion in some
cases and in some cases they are not true and perfectly straight. I am
going to try and track down a plasma globe to see if I can see any signs of
life and go from there.

Thanks for the replies!

Jeff

On Monday, April 2, 2018 at 9:41:58 AM UTC-7, Jeff Aylesworth wrote:


Hi,
Thanks for adding me to the group.

I picked up a case of IN18 tubes at a garage sale in my area. I assembled
the Nixie Tester Kit as sold by Marcin Saj to test them, but can only get
one of 26 to work. His support in trying to see if my tubes were good has
been nothing short of amazing.

The tubes all appear to be new and unused and are pristine on the inside
and in the original carton. Which I why I struggle with the fact that none
of them seem work (save for 1).

I am looking for someone in the Seattle area that has an IN18 clock or
device and more electrical experience than to see if the tubes are any good.

Thanks!
Jeff



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Re: [neonixie-l] 26 In18 Tubes

[Dan Hollis]

I am in redmond and I have an IN-18 clock, as well as lots of spare IN-18 
tubes.


-Dan

On Mon, 2 Apr 2018, Jeff Aylesworth wrote:


Hi,
Thanks for adding me to the group.

I picked up a case of IN18 tubes at a garage sale in my area. I assembled
the Nixie Tester Kit as sold by Marcin Saj to test them, but can only get
one of 26 to work. His support in trying to see if my tubes were good has
been nothing short of amazing.

The tubes all appear to be new and unused and are pristine on the inside
and in the original carton. Which I why I struggle with the fact that none
of them seem work (save for 1).

I am looking for someone in the Seattle area that has an IN18 clock or
device and more electrical experience than to see if the tubes are any good.

Thanks!
Jeff

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[neonixie-l] Re: 26 In18 Tubes

[gregebert]

How much voltage does the nixie tester generate ? I'm hoping it's closer to 
170V, and you just have a batch of tubes that need a few more volts to 
ionize.

That said, I have an IN-18 on my desk here at work, which is dead. There 
are no visible signs of damage, and none of the cathodes glow, even at 300+ 
volts. It also does not respond to my plasma globe. I concluded that it 
somehow de-gassed around the pins because the nib is intact. There is no 
visible date-code; no OTK stamp. Just the CCCP and NH-18 markings.

The surface corrosion on the pins isn't necessarily a problem; most of the 
IN-18's I have were manufactured in 1989, and have very soft pins (easily 
bent) with surface corrosion, which I did not attempt to remove. I have 
worried that over time the corrosion would creep under the glass-seal, and 
cause micro-cracks leading to gas leaks. So far, that has not happened.

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[neonixie-l] Re: 2 Poisoning questions?

[redrok]

Hi Paul;
Unfortunately the schematic image I posted disappeared. Here's a link to 
the same Image.
NixieB56_Array_1.jpg  a 56 
transistor array controlled with 8 lines.
and the simpler
NixieB12_Array_1.jpg  a 12 
transistor array controlled with 4 lines.

These transistor arrays operate as constant current sinks. I've extensively 
tested the B12 using both IN-2 and IN-12B Nixies with a power supply up to 
350V and a sink current of 1.5mA. They work beautifully.

Of course, the draw back is only 1 transistor at a time can be activated 
and the micro pins must be reconfigured between 2 digital outputs, one Hi 
one Low. and the rest as inputs. But micros are fast and do it nicely. I 
think I can do this with an MCP23008 I2C bus expander. Will try that later.

The question about 6/1 muxing stems from the "only 1 active transistor" 
thing so 6 sequential digits need about 6 times the current or about 9mA in 
my case.
The decodesystems reference talks about high mux ratios, 6/1 doesn't seem 
to hi.
Thanks for those references!

You might ask why I'm doing this? I'm a hard core experimenter and like to 
push ideas to the limit to understand them.

On Monday, April 2, 2018 at 6:38:33 AM UTC-5, Paul Andrews wrote:
>
> 1. People like to run 'anti-poisoning' routines - cycling rapidly through 
> all digits at full brightness. Other techniques  include writing blanking 
> routines that turn off the display when there is no one around to look at 
> it. I remain to be convinced that anti-poising routines work.
> 2. Later tubes were developed specifically with multiplexing in mind - 
> they will produce a good display with temporary higher currents. Some of 
> this has to do with stopping the glow spreading to the support structure, 
> some with the persistence of the glow between pulses and maybe some with 
> the resilience of the cathodes to the higher current. For example I have 
> seen adverts for tubes like the B5750 that explicitly mention how many 
> digits can be multiplexed.
>
> I don't thing you will need 6xI for this, but something less.
>
> Which tubes are you thinking of using?
>
> I will try to dig up some links to specific information.
>
>

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[neonixie-l] Re: 26 In18 Tubes

['jf...@my-deja.com' via neonixie-l]

On Monday, April 2, 2018 at 11:04:16 AM UTC-7, Jeff Aylesworth wrote:
> The lowest hanging fruit seems to be the plasma ball proximity test.
> Jeff
Along the same lines, you could use your toy Tesla coil or van de Graaf 
generator...

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[neonixie-l] Re: 26 In18 Tubes

[Jeff Aylesworth]

Hi Terry, 
The guy did have a LOT of neon sign manufacturing materials and other 
equipment. He was definitely either some sort of professional or deep into 
electrical/electronic hobbies. I suppose they could have been castoffs for 
sure but the date codes and other markings match across the lot.

The lowest hanging fruit seems to be the plasma ball proximity test.

 Jeff

On Monday, April 2, 2018 at 10:58:09 AM UTC-7, Terry S wrote:
>
> Are they all the same date codes? Perhaps they are the fallout of a 
> sorting effort.
>
> IN-18's at a garage sale? And a whole case! What are the odds? 
>
> As others mentioned, there are numerous ways to test such tubes. A while 
> back I bought a cheap handheld device for testing neon sign tubes. Works 
> good for nixies too, although it does seem to have destroyed the decimal 
> points on a couple of IN-14's. After that I never touch the pins directly 
> any more, just the glass.
>
> Terry
>
>
> On Monday, April 2, 2018 at 12:17:16 PM UTC-5, Jeff Aylesworth wrote:
>>
>> I don' know the history on them at all, I rescued them from a garage sale 
>> in my neighborhood. The pins do seem to have a little corrosion in some 
>> cases and in some cases they are not true and perfectly straight. I am 
>> going to try and track down a plasma globe to see if I can see any signs of 
>> life and go from there.
>>
>> Thanks for the replies!
>>
>> Jeff
>>
>> On Monday, April 2, 2018 at 9:41:58 AM UTC-7, Jeff Aylesworth wrote:
>>>
>>> Hi,
>>> Thanks for adding me to the group.
>>>
>>> I picked up a case of IN18 tubes at a garage sale in my area. I 
>>> assembled the Nixie Tester Kit as sold by Marcin Saj to test them, but can 
>>> only get one of 26 to work. His support in trying to see if my tubes were 
>>> good has been nothing short of amazing.
>>>
>>> The tubes all appear to be new and unused and are pristine on the inside 
>>> and in the original carton. Which I why I struggle with the fact that none 
>>> of them seem work (save for 1).
>>>
>>> I am looking for someone in the Seattle area that has an IN18 clock or 
>>> device and more electrical experience than to see if the tubes are any good.
>>>
>>> Thanks!
>>> Jeff
>>>
>>

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[neonixie-l] Re: 26 In18 Tubes

[Terry S]

Are they all the same date codes? Perhaps they are the fallout of a sorting 
effort.

IN-18's at a garage sale? And a whole case! What are the odds? 

As others mentioned, there are numerous ways to test such tubes. A while 
back I bought a cheap handheld device for testing neon sign tubes. Works 
good for nixies too, although it does seem to have destroyed the decimal 
points on a couple of IN-14's. After that I never touch the pins directly 
any more, just the glass.

Terry


On Monday, April 2, 2018 at 12:17:16 PM UTC-5, Jeff Aylesworth wrote:
>
> I don' know the history on them at all, I rescued them from a garage sale 
> in my neighborhood. The pins do seem to have a little corrosion in some 
> cases and in some cases they are not true and perfectly straight. I am 
> going to try and track down a plasma globe to see if I can see any signs of 
> life and go from there.
>
> Thanks for the replies!
>
> Jeff
>
> On Monday, April 2, 2018 at 9:41:58 AM UTC-7, Jeff Aylesworth wrote:
>>
>> Hi,
>> Thanks for adding me to the group.
>>
>> I picked up a case of IN18 tubes at a garage sale in my area. I assembled 
>> the Nixie Tester Kit as sold by Marcin Saj to test them, but can only get 
>> one of 26 to work. His support in trying to see if my tubes were good has 
>> been nothing short of amazing.
>>
>> The tubes all appear to be new and unused and are pristine on the inside 
>> and in the original carton. Which I why I struggle with the fact that none 
>> of them seem work (save for 1).
>>
>> I am looking for someone in the Seattle area that has an IN18 clock or 
>> device and more electrical experience than to see if the tubes are any good.
>>
>> Thanks!
>> Jeff
>>
>

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[neonixie-l] Re: 26 In18 Tubes

[Jeff Aylesworth]

I don' know the history on them at all, I rescued them from a garage sale 
in my neighborhood. The pins do seem to have a little corrosion in some 
cases and in some cases they are not true and perfectly straight. I am 
going to try and track down a plasma globe to see if I can see any signs of 
life and go from there.

Thanks for the replies!

Jeff

On Monday, April 2, 2018 at 9:41:58 AM UTC-7, Jeff Aylesworth wrote:
>
> Hi,
> Thanks for adding me to the group.
>
> I picked up a case of IN18 tubes at a garage sale in my area. I assembled 
> the Nixie Tester Kit as sold by Marcin Saj to test them, but can only get 
> one of 26 to work. His support in trying to see if my tubes were good has 
> been nothing short of amazing.
>
> The tubes all appear to be new and unused and are pristine on the inside 
> and in the original carton. Which I why I struggle with the fact that none 
> of them seem work (save for 1).
>
> I am looking for someone in the Seattle area that has an IN18 clock or 
> device and more electrical experience than to see if the tubes are any good.
>
> Thanks!
> Jeff
>

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[neonixie-l] Re: 26 In18 Tubes

['jf...@my-deja.com' via neonixie-l]

You don't need a "Nixie tester".  All you need is current-limited high 
voltage.  In the US, a 100K resistor in series with 120-150 Vac (use an 
isolation transformer; do not connect directly to the mains!) should light 
one or two digits at a time.

Are you sure they are new?  Can yo see any longitudinal scratches on the 
pins?  This would be evidence of insertion into sockets.

To my eyes, it looks like the pins are not true.  That could be evidence of 
stress that could have broken the glass-to-metal seal and allowed the neon 
t leak out.  The conventional wisdom is that sockets should have floating 
pins that do not stress the pins (socket pins not rigidly soldered to the 
pc board).

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Re: [neonixie-l] 26 In18 Tubes

[Nicholas Stock]

Jeff, do you have a plasma globe? You know, one of the cool display like 
objects? If you do or know someone with one, the quickest test to see if the 
tubes contain gas is to hold them up against the plasma globe. If they glow 
then they’re probably OK, if not then the tubes have out-gassed somehow and are 
no good...:-(

(Pharma) Nick

Sent from my iPhone

> On Apr 2, 2018, at 09:41, Jeff Aylesworth  wrote:
> 
> Hi,
> Thanks for adding me to the group.
> 
> I picked up a case of IN18 tubes at a garage sale in my area. I assembled the 
> Nixie Tester Kit as sold by Marcin Saj to test them, but can only get one of 
> 26 to work. His support in trying to see if my tubes were good has been 
> nothing short of amazing.
> 
> The tubes all appear to be new and unused and are pristine on the inside and 
> in the original carton. Which I why I struggle with the fact that none of 
> them seem work (save for 1).
> 
> I am looking for someone in the Seattle area that has an IN18 clock or device 
> and more electrical experience than to see if the tubes are any good.
> 
> Thanks!
> Jeff
> -- 
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> For more options, visit https://groups.google.com/d/optout.
> 
> 
> 

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[neonixie-l] Re: Nixie Tube Rodan CD47/Gr-414 (OKAYA)

[Dekatron42]

A second one from the same 
seller: 
https://www.ebay.de/itm/Nixie-Tube-Rohre-Rodan-CD47-Gr-414-OKAYA/183157694930?hash=item2aa50ca1d2:g:YS0AAOSwxa9awS~T
 
first one sold for Euro 500,50! No feedback yet.

/Martin

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[neonixie-l] 2 Poisoning questions?

[Paul Andrews]

http://worldpowersystems.com/archives/Burroughs/
http://www.decodesystems.com/re-how-nixies-work.html
https://threeneurons.wordpress.com/nixie-power-supply/
http://informationdisplay.org/Portals/InformationDisplay/IssuePDF/V05N04-1968%20JulAugSmall.pdf
 (Page 2 advert) B5750 and B5855.

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[neonixie-l] 2 Poisoning questions?

[Paul Andrews]

1. People like to run 'anti-poisoning' routines - cycling rapidly through all 
digits at full brightness. Other techniques  include writing blanking routines 
that turn off the display when there is no one around to look at it. I remain 
to be convinced that anti-poising routines work.
2. Later tubes were developed specifically with multiplexing in mind - they 
will produce a good display with temporary higher currents. Some of this has to 
do with stopping the glow spreading to the support structure, some with the 
persistence of the glow between pulses and maybe some with the resilience of 
the cathodes to the higher current. For example I have seen adverts for tubes 
like the B5750 that explicitly mention how many digits can be multiplexed.

I don't thing you will need 6xI for this, but something less.

Which tubes are you thinking of using?

I will try to dig up some links to specific information.

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