Tell me about it :-/ I had smoke coming out of something the other day.
Amazingly nothing was damaged. Live and learn!
On Sunday, March 12, 2017 at 10:17:17 PM UTC-4, gregebert wrote:
>
> *If everything is properly connected*, even an internal short in the
> 74141 that leaked high-voltage back
I have often wondered about taking a geiger counter to my tubes. Call me
paranoid, but I wonder where some of the NOS tubes come from precisely.
On Sunday, March 12, 2017 at 3:41:11 PM UTC-4, SWISSNIXIE - Jonathan F.
wrote:
>
> Hi
>
> This might be a little off topic or irrelevant, but maybe
*If everything is properly connected*, even an internal short in the 74141
that leaked high-voltage back to the Arduino, which seems unlikely, would
be limited to a few mA so it's unlikely to cause damage.
Your biggest risk is a hookup error, or possibly ESD damage to the Arduino
from
Thanks! It looks like the leads were clipped, so I believe no desoldering
was done. The cathodes look extremely shiny/polished, so my hunch is that
this calculator just sat in some Ukrainian basement collecting dust, maybe
used every once in a while.
Another question, I bought a six pack of
On 03/12/2017 06:16 PM, Charles MacDonald wrote:
> But how many Bananas and Brazil nuts do you keep around. those are the
> real home based radiation sources...
>
>
http://www.neon-john.com/Nuke/Salt_substitute.jpg
http://www.neon-john.com/Nuke/K40_on_geiger_counter.jpg
On 17-03-12 04:56 PM, gregebert wrote:
1 tube may produce 0.4uSv/Hr, but a clock with many more tubes will
produce more radiation. I have a total of 47 nixie tubes operating in my
home, plus another 6 at work. However, most of my tubes are at least 50
years old, so I'm not too concerned.
But
Also 42-Ar is a source of ß-radiaiton, that is used in tubes, even starters for
fluorescent lamps!
Anyhow, radioactive isotopes are more frequently used in electron tubes.
Particular tubes for transmitting and radar purpose. Thorium is allied to
Tungsten in filaments for HF power tubes to
1 tube may produce 0.4uSv/Hr, but a clock with many more tubes will produce
more radiation. I have a total of 47 nixie tubes operating in my home, plus
another 6 at work. However, most of my tubes are at least 50 years old, so
I'm not too concerned.
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Very interesting Jonathan.
Any chance you could share a picture of the little warning sign and its
position?
I have very few of those Nixies and all tested negative, but my counter is
quite insensitive.
Thank you!
Paolo
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Hi
This might be a little off topic or irrelevant, but maybe someone is
interested in it too.
One of my hobbies aside nixies is technology related with radiation and
nuclear (geiger counters, etc).
Today i was sorting my nixies into boxes and held a B-5092-A from
Burroughs, as i spotted a
Here is a schematic. Some notes about it: The filament (aka the cathode)
should always have 1V across it. It has to be warm. When it is warm it has
a resistance of about 30R. So the purpose of the resistor network there is
that it cuts the 12V up into 3V, 1V and 8V (approximately). The filament
Well, I was waiting off for other comments to surface or for the kit supplier
to pipe up.
I see a few choices:-
- contact the supplier for comment
- measure waveforms/ logic levels and act accordingly
- try specially selecting 74LSxx that work in the location [might be
temperamental with age,
Wow! Awesome...the purple ceramic ones look very nice.
I own a few led displays my self some cermic hp 4digit in size of a dip16 and
some of these "bubble" ones.
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Make a binary clock!
On Sunday, March 12, 2017 at 3:08:25 AM UTC, Paul Andrews wrote:
>
> A closeup of the filament structure. This is what attracted me to these
> tubes. Now I just have to figure out what I want to do with them!
>
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Me too please!
Thanks!
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