Incomplete sentence...
> On Oct 9, 2023, at 4:09 PM, Mac Doktor wrote:
>
>
> Sadly, the alpha particles from
...an alpha source such as a household smoke detector won't make it though the
glass.
Terry Bowman, KA4HJH
"The Mac Doctor"
https://www.astarcloseup.com
“...the book said
> On Oct 9, 2023, at 3:23 PM, Jim KO5V wrote:
>
> As suggested, I think the photons from the lamp helped with the ionization
> just enough to allow the tube's segments to eventually light up enough to
> heal themselves.
I don't know about healing but light helps the gas to ionize. I would
My first nixie clock with 5092 tubes has been running since 2011. I use
+340VDC for the anodes, and of course the anode resistors are appropriately
increased to give the optimum 2.2mA of current.
So, why did I choose 340VDC when the mains here in the US are 120V RMS ?
This clock has no
I thought I had heard/read that lower voltage was better, though a cursory
search suggests that the rate of sputtering is nearly directly proportional
to current, so that makes sense, the only reason aside from arcing that I
could think of would be making the internal wires glow
On Sun, Oct 8,
Another note about firing voltage is that in general, using higher voltages for nixies, ie. >200V increases lifespan, assuming the proper anode resistor is used.On Oct 8, 2023, at 11:13 AM, Nicholas Stock wrote:I've noticed a few 7971's needing a couple of hours to fully illuminate after which
Hi Nick and Ira, and guus, and gregebert and Paul and anyone else I have missed,
Thanks for the replies. The light affecting the ionization was what puzzled me,
but a couple of you explained that, and it makes sense. I have a way to test
the tube on the bench, so maybe I can bring it back that
I've noticed a few 7971's needing a couple of hours to fully illuminate after which they're apparently very happy in the long term if in operation. Is this sign of a very small leak or something else? I'm not sure what to make of the 'gassy' term to be honestwere 7971's doped with Hg?NickSent
I’ve had some of these tubes that require a higher than normal voltage to
even trigger. Most people drive nixies at 170V, but this can be a marginal
trigger voltage for some tubes and completely insufficient for others such
as the GR10G https://www.nixies.us/bwg_gallery/gr10g/
Shining light
Can you do some bench-testing to see if the segments fully light with a bit
more voltage ?
I collected current-voltage (I-V) data on all my 7971's so I can check them
for aging effects.
On Sunday, October 8, 2023 at 6:01:55 AM UTC-7 guus.assm...@wolmail.nl
wrote:
> Hello Jim,
>
> If you
Hello Jim,
If you have a source of UV-light, that will do a good job.
Maybe an UV-Led beneath the tube will do the trick
BR/
Guus
> Op 07-10-2023 19:26 CEST schreef Jim KO5V :
>
>
> I have a B7971 that doesn't want to light up - the ends of some segments will
> glow, but none will
I have a B7971 that doesn't want to light up - the ends of some segments
will glow, but none will illuminate along their entire length. I have had
tubes in the past that were probably a bit gassy, and they cleaned up after
running for a few minutes to a few hours.
So, I put it into the "10
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