Re: [neonixie-l] Re: Helping Nixie Tubes Fire in a Darkened Room

[Christian Riise Wagner]

You won't generate ozone with 365nm. You'd need shorter wavelength UVC for 
that.

søndag den 3. december 2023 kl. 09.25.35 UTC+1 skrev Tidak Ada:

> Hi Jeff, good to hear you are content with my suggestion.
>
> Two remarks: I  bought at a time small 365nm transmission filter from a 
> seller at either AliExpress or Banggood. That reduces the amount of visible 
> light considerabele. Second, make that the UV flash only during a short 
> period around the firing of the of the nixie segments. That will reduce the 
> production of ozone considerable.
>
> Cheers,
>eric
>
> Verstuurd vanaf mijn iPhone
>
> Op 3 dec. 2023 om 08:09 heeft Jeff Walton  het 
> volgende geschreven:
>
> 
>
> I've done some testing with common 3mm UV LEDs that are in the 395nM 
> range.  Running them at ~5mA provides a dim purple color light that when 
> placed under or in front of the tube actually makes the reliability of the 
> ignition very stable.  Even in a fully darkened room, the segments and 
> decimal points light reliably.  
>
> This particular tube (MG-17G) has segments with no anode screen in front 
> of the tube, so they seem to behave a little differently than a regular 
> nixie.  I also found that if I placed fingers on the sides of the tubes 
> while operating, the segments lit more reliably.  I think that I will go 
> for an LED under each tube but powered just enough to make the tubes work 
> better and not to try to supply any visible base lighting.  I will try 
> 365nM LED's when they arrive and may use them if there is less noticeable, 
> visible light.
>
> Thanks for the suggestions!
>
> Jeff
>
> On Wednesday, November 29, 2023 at 8:43:48 PM UTC-6 Jeff Walton wrote:
>
>> I've recently come across a situation where I have some tubes in a clock 
>> that are being directly driven and are having trouble starting when the 
>> room is darkened but light right up when a room light is turned on.  These 
>> particular tubes were probably intended for use in a calculator.  They are 
>> seven segment neon MG-17G tubes.  Once the tubes have any of the segments 
>> lit, there is really no issue with the performance.  It's when the tubes go 
>> completely dark if a space is used while scrolling a message or lighting a 
>> dash on and off to emulate a colon.  I'm wondering if others have found any 
>> particular tricks to help convince tubes to light up.  There is no 
>> "baselighting" and the HV is ~172v.  I'm considering increasing the HV by 
>> 10-15v but don't want to over drive the tubes.  Short of putting a 
>> radioactive source in the vicinity, are there other things that anyone has 
>> had any luck with?
>>
>> Jeff
>>
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> 
> .
>
>

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[neonixie-l] FS 4MP1 square face CRT for scopeclocks

['Jan Wuesten' via neonixie-l]

Hello,

short info: we do have a bunch of 4MP1 square face CRT suitable for
scopeclocks on sale

https://www.die-wuestens.de/ri.htm

Feel free to email me directly.

Enjoy Christmas time and stay brave

Jan

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Re: [neonixie-l] Re: Helping Nixie Tubes Fire in a Darkened Room

[Tidak Ada]

Hi Jeff, good to hear you are content with my suggestion.

Two remarks: I  bought at a time small 365nm transmission filter from a seller 
at either AliExpress or Banggood. That reduces the amount of visible light 
considerabele. Second, make that the UV flash only during a short period around 
the firing of the of the nixie segments. That will reduce the production of 
ozone considerable.

Cheers,
   eric

Verstuurd vanaf mijn iPhone

> Op 3 dec. 2023 om 08:09 heeft Jeff Walton  het volgende 
> geschreven:
> 
> 
> I've done some testing with common 3mm UV LEDs that are in the 395nM range.  
> Running them at ~5mA provides a dim purple color light that when placed under 
> or in front of the tube actually makes the reliability of the ignition very 
> stable.  Even in a fully darkened room, the segments and decimal points light 
> reliably.  
> 
> This particular tube (MG-17G) has segments with no anode screen in front of 
> the tube, so they seem to behave a little differently than a regular nixie.  
> I also found that if I placed fingers on the sides of the tubes while 
> operating, the segments lit more reliably.  I think that I will go for an LED 
> under each tube but powered just enough to make the tubes work better and not 
> to try to supply any visible base lighting.  I will try 365nM LED's when they 
> arrive and may use them if there is less noticeable, visible light.
> 
> Thanks for the suggestions!
> 
> Jeff
> 
>> On Wednesday, November 29, 2023 at 8:43:48 PM UTC-6 Jeff Walton wrote:
>> I've recently come across a situation where I have some tubes in a clock 
>> that are being directly driven and are having trouble starting when the room 
>> is darkened but light right up when a room light is turned on.  These 
>> particular tubes were probably intended for use in a calculator.  They are 
>> seven segment neon MG-17G tubes.  Once the tubes have any of the segments 
>> lit, there is really no issue with the performance.  It's when the tubes go 
>> completely dark if a space is used while scrolling a message or lighting a 
>> dash on and off to emulate a colon.  I'm wondering if others have found any 
>> particular tricks to help convince tubes to light up.  There is no 
>> "baselighting" and the HV is ~172v.  I'm considering increasing the HV by 
>> 10-15v but don't want to over drive the tubes.  Short of putting a 
>> radioactive source in the vicinity, are there other things that anyone has 
>> had any luck with?
>> 
>> Jeff
> 
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