Hey again John,
Just get some little 'seed' beads from the bead store for spacers.
If you've got ultrasound, I recommend it- there can be a little
refractory sludge in 'em from the production.
I made a few 'crackle' tubes using black seed beads and neon about 10
years back...really cool effect.
-Dylan
On Friday, September 28, 2012 7:09:57 AM UTC-7, jrehwin wrote:
>
> > it is not so easy, the total surface of each digit should be constant to
> achieve constant current and constant brightness of each digit (else You
> will have to struggle with resistors on cathodes..). Bigger number = higher
> current..
>
> While this is true, it isn't an absolute. Existing nixies have different
> currents for different digits (particularlay "1"). Since they're
> more-or-less constant
> voltage devices, the anode resistor tends to even out the different
> current draws. Running nixies from higher voltages with larger anode
> resistors
> helps with this (at the cost of efficiency). Some designs actually use
> current regulation instead of anode resistors, and these will tend to
> overdrive
> the smaller digits slightly.
>
> That said, it would be simple enough to write code to adjust the digit
> stroke thicknesses to achieve matching total areas. Note that in some
> nixies,
> the "1" digit is made with a double stroke to help with this.
>
> > And I also like the retro look of original digits ;-)
>
> That is a perfectly valid reason. If I were going to clone a nixie, I'd
> choose the CD-66 with its particularly nice digit shapes.
>
> However, if I'm making my own nixies, I'd be interested in making them
> visibly distinct from existing ones. If I want a CD-66, I
> can just go buy one (unless I want a CD-66 with 30mm digits). If I want a
> nixie with Böcklin or Klingon digits, I'll have to make
> my own.
>
> There's also a mechanical consideration - thicker digits will be more
> rigid and stable, and should survive longer. However,
> this thickness can be in material thickness or stroke width.
>
> > Once I have working tube (as close as possible to original) I can play
> and change things inside..
>
> Absolutely. Coming up with digit shapes is likely not the most difficult
> problem in making nixies.
>
> > Have You made something working with mentioned digit graphics?
>
> Not as of yet. My original plan was to photoetch them, but I just heard
> from someone who's making custom variable
> capacitor plates, and has access to a water jet cutter.
>
> I've been pricing the little ceramic rings used as insulating digit
> separators, and they're expensive, so now I'm thinking
> of glass and mica as alternatives.
>
> - John
>
>
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