Some tubes were doped with Kr85. They have little radiation signs on
them 122P224, Paul has a nice write up here (
https://www.nixies.us/bwg_gallery/122p224/). Half life is 10 years, so a
lot of decay since manufacture
On Thu, Nov 30, 2023 at 2:42 PM liam bartosiewicz <
If I remember correctly, there were some tubes manufactured that had a small external radioactive source to make them more reliable. It wouldn’t be very practical, or safe for that matter, but a radioactive nixie clock does sound pretty cool.On Nov 30, 2023, at 1:43 PM, Nicholas Stock wrote:May
I've never had problems with tubes failing to ignite, perhaps because I use
higher-than-minimum supply voltages, typically around +200VDC. My first
clock uses 340V.
On Thursday, November 30, 2023 at 1:46:25 PM UTC-8 Jeff Walton wrote:
> Give me the glow, Nick!
>
>
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I can try to modify the Omnixie HV module if higher voltage shows promise.
The module will be a little bit of a challenge as it has really small parts
and I have a rework gun that might be on the large side and melt everything
around the target resistor.
On Thursday, November 30, 2023 at
May I suggest a small piece of uranium ore placed next to the clock?
LOL.
Just kidding Jeff! I like Jon's idea, up the voltage/series resistor.
On Thu, Nov 30, 2023 at 1:38 PM Jeff Walton wrote:
> Not dimmed. Tried to do a momentary hit on all segments to "wake" up the
> tube and it helped
Have some 365 and 395nm LED chips on order to experiment with. Will try
some things when I get them. Hopefully they will help and I can hide them
under the tube. I saw some 245nm LEDs but super expensive and larger.
On Thursday, November 30, 2023 at 9:28:27 AM UTC-6 Tidak Ada wrote:
> Why
Not dimmed. Tried to do a momentary hit on all segments to "wake" up the
tube and it helped some but the extra flash is distracting.
On Thursday, November 30, 2023 at 9:04:36 AM UTC-6 Paul Andrews wrote:
> Are they also dimmed using an LDR? If so, turn dimming off - if you have
> access to
I had a radio (can't remember the type,) that had a small neon bulb under
the chassis ...and NE2 perhaps. I think it was used as a cheap and dirty
voltage reference . The thing was, when the chassis was flat on the bench
in operating position, the bulb would never fire. When I tipped it on
Just sent you an email.
On Thu, Nov 30, 2023 at 8:17 AM John wrote:
> This is a nice original condition meter that works... no additional holes,
> etc. Built like a tank for it's small size. Heath didn't spare any money on
> the enclosure.
>
> $20 plus actual shipping. * I use Pirate Ship for
Why not a trial with UV-LED’s 365 nm is a useful wavelength and you don’t need
to use then at full power.
You can use them in a pulsed mode only during refresh of the display to avoid
too much O3 production. Iyt is not as hazardous as the use of ß-radiating
isotopes as used in rigger tubes.
This is a nice original condition meter that works... no additional holes,
etc. Built like a tank for it's small size. Heath didn't spare any money on
the enclosure.
$20 plus actual shipping. * I use Pirate Ship for their significant
discounts.* The farthest location from me in the US is
Are they also dimmed using an LDR? If so, turn dimming off - if you have
access to the source code, you could turn dimming off briefly when the
clock turns on.
On Wednesday, November 29, 2023 at 9:43:48 PM UTC-5 Jeff Walton wrote:
> I've recently come across a situation where I have some tubes
I think the best approach would be to increase the HV. If you look at the
discussions of glow physics in Weston or Acton for example, the lag in
striking a glow from dark (which is what we're talking about here) is
reduced by using an anode voltage materially above the threshold striking
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