IN-8-2 Anode wire broken

[Benoit Tourret]

Hello, do you know if there is a way to fix a broken wire on a IN-8-2 nixie, it is cut just at the level of the glass. and, of course, this is the anode...

do you think that a conductive glue could work ?

[gregebert]

Atom Adhesives sells electrically-conductive adhesives, but be aware of the cost. It's probably best to get a new tube, because any vibration or movement is likely to break-off the bond. Remember- you cant use a large glob like regular adhesives to add bonding-strength because it will short to adjacent pins. [OK, you could put sleeves on all of the other pins, apply an insulating layer of non-conductive epoxy, then bond over all that with a large glob of conductive epoxy. What a mess.....]

I've only used their thermally-conductive epoxy and it works nicely.

Another option is if you dont need all 10 digits, you might be able to use one of them as an anode. I've never actually done that before, but it's theoretically possible.

[Benoit Tourret]

I never thought using a cathode as anode...

I just tested , plugging the number 8 on +170V, all the other number are working when grounded. 

same with the number 4. those two numbers gave the best results. good idea to recycle them on a clock...

I think use it for test purposes, with a 3D printed support : https://www.thingiverse.com/thing:4571828

I will first try a rear windows defogger repair kit...

[martin martin]

I used the conductive adhesive on a Mini Cooper to repair the window antenna for FM. 

It did not work at all. 

--
You received this message because you are subscribed to the Google Groups "neonixie-l" group.
To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/c0206606-c368-47e2-b62e-f2e85d686ec3n%40googlegroups.com.

--

mcve...@gmail.com

[Michail Wilson]

Why not try to quick soldier a lead wire to it.  I’ve done it often with a number of IN-14s I’ve received.   Especially since I use the decimal points which many have had the legs cut off when they were installed in equipment half a century earlier.    Flux it up and a quick hit with iron and solder to tin it and then again when you get a wire you’re happy with to soldier to it. 

Sent from Space

On Mar 20, 2023, at 10:59 AM, martin martin <mcve...@gmail.com> wrote:



To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CAKYv7NR4G0kTi-OrsZGiD1jJHsXxZZA6ZLeJcWjhEXHh3Q0rQw%40mail.gmail.com.

[Christian Riise Wagner]

Instead of using just one cathode as anode, if you're using it for the 10s of hours, you can hook up all the remaining 7 cathodes to be anodes. I did this in one of my clocks. The striking voltage is still slightly higher, but it works quite well.

[Benoit Tourret]

The cable is way too short. It must be about 0.1 mm

[Jeff Walton]

I have used a Dremel tool with a small high-speed diamond or carbide wheel and created a small slot opening in the glass next to the wire.  You can carefully make a soldered or conductive glue connection with a wire wrap or some other small gauge wire (30-32 ga) .  Scrape the edge of the nixie wire that you expose to get a bare metal surface and carefully make a connection.  After, carefully use acetone (or other) solvent to clean the area around the pin and use a drop of epoxy or UV cure adhesive to protect the connection and secure the small gauge wire to the base of the tube to eliminate stress.  You will need to protect the connection from future stress but as long as you do not further damage the glass/glass wire seal, it should serve you moving forward.  The rest of the intact leads will handle the mounting.

 

You do have risk of breaking the tube if you are not careful but it does give you a viable option to save an otherwise good nixie.

 

Jeff  

 

 

 

From: neoni...@googlegroups.com <neoni...@googlegroups.com> On Behalf Of Benoit Tourret
Sent: Thursday, March 23, 2023 8:33 AM
To: neonixie-l <neoni...@googlegroups.com>
Subject: Re: [neonixie-l] Re: IN-8-2 Anode wire broken

 

The cable is way too short. It must be about 0.1 mm

 

To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/7e5c5341-0633-464a-a649-7e930bcf2b4dn%40googlegroups.com.

[Nicholas Stock]

Benoit, whilst Jeff's advice is great, for an IN-8-2 tube, I'm not sure it's worth all that effort. Now, if it was a Z568 or NL7094 etc, then yeah, I'd go to those lengths for sure, but IN-8-2's can still be had for $15 or so....

If you can't find any, then PM me, I can sell you a couple if you need them for a reasonable price.

Cheers,

Nick

To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/002201d95daf%24052b15f0%240f8141d0%24%40gmail.com.

[Benoit Tourret]

Thanks everybody.

I know that tube is not the more expensive I have, but, I can try to gain experience for an other tube ...

this one have all other legs with 35mm length. I can already use it with one sign as cathode. easy for a clock: 6, 7, 8 and 9 are not used by 50% of the tubes.

I have two others in-8-2 with shorts pins, (between 2mm and 10mm)

I will try to save the maximum, even if they are glued on a support, I can manage a connector for testing purpose.

I wonder if tin soldier is not a bit weak, I never could solder the two wires end to end. may be I should try with a spot welding ???

I definitly prefers loose a pair of ИН-8-2 to gain a bit of experience ;-)

[Jeff Walton]

You cut the small slot next to the wire.  That way you do not have an “end-to-end” connection.  It will allow a side-to-side connection based on how deep you make the slot.  It will still be short but much better mechanically than end to end.  Must use very thin wire, like wire wrap wire.

To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/6edb0758-dd0b-4e19-899b-735810bea079n%40googlegroups.com.

[gregebert]

In the large photo above, there appears to be a crack near the base of the tube. If it really is a crack, there will be a vacuum leak.

[Benoit Tourret]

It is not a crack, it is the mica spacer inside the tube.

[Jasper nagle]

Hello I’m thinking you might be able to 3d print a spacer if you have a 3d printer then glue it to the tube then put some conductive glue in the hole in the spacer where the pin is missing and then stick the pin in there that might help the little wire not break off again too

To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/44a9b377-fb8d-4b1f-ba89-332d74f7619an%40googlegroups.com.