Ooops, screwed up the linkhttp://www.badnixie.com/Web_Files/IMG_3244.JPG
On Jul 16, 1:04 pm, MichaelB wrote:
> Here's a pic of the infamous blue dot taken with Powershot SD800:
> badnixie.com/Web_Files/IMG_3244.JPG
>
> On Jul 14, 8:30 pm, "Dieter Waechter" wrote:
>
>
>
> > > Lots of speculat
Here's a pic of the infamous blue dot taken with Powershot SD800:
badnixie.com/Web_Files/IMG_3244.JPG
On Jul 14, 8:30 pm, "Dieter Waechter" wrote:
> > Lots of speculation on the blue dot.
>
> I don't think anyone has come up with an absolutely answer. Just guessing,
> etc.
>
> Yes of course. The
On Jul 15, 8:51 am, Dieter Waechter wrote:
> It can not appear there, since Jeff does not apply any Ucc.
> The cathodes are switched from 170V to zero.
> He uses real high voltage supertex drivers, no clamped drivers (like
> 74141 are, for example).
> I hope you have not changed the circuitry, Jef
If it is the circuit that causes the problem, then why do some tubes
exhibit this and other don't.
As I said: because of the amount of mercury.
Some tubes have more, some have less mercury.
That's all.
Some have such less, that also if you go down to 40 Volts Ucc the spot
does not appear.
Jür
Thanks.
If it is the circuit that causes the problem, then why do some tubes
exhibit this and other don't.
I have tubes that display the issue on any clock I own - admittedly, I
don't believe I have any from you.
Michail Wilson
206-920-6312
In a message dated 7/15/2011 9:05:16 A.M.
But Michail,
If you want the blue spot on every IN-18 just clamp to a lower Ucc
If it appears or not depends to the mercury amount in the tube and the
Ucc voltage level.
That's all.
You also can fade in and out the blue spot if you like... no problem.
When I have time I take a short video wi
That's good to know. I'll try the offending tube in my Nixiechron to see
if the blue spot dares to show it's ugly face!
It can not appear there, since Jeff does not apply any Ucc.
The cathodes are switched from 170V to zero.
He uses real high voltage supertex drivers, no clamped drivers (like
Ugly? Dude, it's beautiful. :)
PS. If it was a circuit problem, then why do about 20% of the tubes have
this issue/benefit? Anyone has a blue dot tube that they don't want,
please send to me. I would be happy to care for it. :)
Michail Wilson
206-920-6312
In a message dated 7
That's good to know. I'll try the offending tube in my Nixiechron to see if
the blue spot dares to show it's ugly face!
On Fri, Jul 15, 2011 at 8:41 AM, Dieter Waechter wrote:
>
> Thanks for the possible explanation Dieter. Does this fit with the fact
>> that the same tube shows the same defect
Thanks for the possible explanation Dieter. Does this fit with the fact
that the same tube shows the same defect on just one digit in multiple
different IN-18 clocks?
First: Note that it is NOT a defect. It is a wrong driver circuit. The
mistake is made by the circuit designer, not by the tub
Thanks for the possible explanation Dieter. Does this fit with the fact that
the same tube shows the same defect on just one digit in multiple different
IN-18 clocks?
Nick
On Thu, Jul 14, 2011 at 8:30 PM, Dieter Waechter wrote:
> Lots of speculation on the blue dot.
>>
> I don't think anyone ha
Lots of speculation on the blue dot.
I don't think anyone has come up with an absolutely answer. Just guessing,
etc.
Yes of course. There is only one right answer.
http://www.tube-tester.com/sites/nixie/data/in18.htm
The blus spot is the mercury glowing if Ucc is too low.
All you need to do is
Lots of speculation on the blue dot.
I don't think anyone has come up with an absolutely answer. Just
guessing, etc.
I have sold hundreds of the IN-18. I used to consider the blue dot as
something I wanted to get rid of in my stock; however, I have changed my mind.
Now, I have about 5
Just what exactly causes that phenomenon? I've had a few IN-18's over the
years that have shown various blue dotsalways wondered what caused
themideas?
Nick
On Thu, Jul 14, 2011 at 7:03 PM, Tristan wrote:
> Having spent some time photographing the IN-18 "blue dot" phenomenon I
> can say
Having spent some time photographing the IN-18 "blue dot" phenomenon I
can say that it is a matter of balancing the ambient (or flash) light
with the emitted light. If getting up close it is a good idea to
manually set a small aperture (high F number) and using a longer
exposure so the depth of fie
On Jul 14, 5:44 pm, Nick wrote:
> I bought a cheapy light tent on eBay - a 40cm PhotoSEL as
> inhttp://cgi.ebay.co.uk/170626510059
>
> Came with 2 "daylight" floods. Does a nice job.
Here's a photo of one of John S's clocks:
http://www.desmith.net/NMdS/Nixies/P1020086.JPG
--
You received this
I bought a cheapy light tent on eBay - a 40cm PhotoSEL as in
http://cgi.ebay.co.uk/170626510059
Came with 2 "daylight" floods. Does a nice job.
Nick
On Jul 14, 5:23 pm, jb-electronics
wrote:
> Hi folks,
>
> given the thoughts in a different threads, I was curious what techniques
> you use to ph
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