GI-11B Nixie Tube

[Jonathan F.]

Hi folks,

I bought a nixie tube. According to label, its a GI-11B. It looks like the GI-10 but has an additional wire inside and outside and the dimensions are slightly different.

If found nothing about this tube, maybe somebody here knows more about it...

I don't know if its genuine, but it says its an engineering sample. Maybe it was never commercially made...


Personally i think is a beautiful little tube.

Here are the Images i like to share with you:

 

 

[John Rehwinkel]

I bought a nixie tube. According to label, its a GI-11B. It looks like the GI-10 but has an additional wire inside and outside and the dimensions are slightly different.

That is a truly nice find, and it's great that it still lights!  Can you tell where the extra wire goes?  I'm guessing an intermediate anode (possibly an "8" shape).

- John

[Jonathan F.]

The extra Wire goes to the metal disc you can see in the middle of the first picture. From this disc is another wire rising on the side of the digits, but isnt connected to anything. Will post a picture

[Jonathan F.]

Here are the images of the additional wire, and the "pole" in glass. Both connected in to a metal disk inside the tube

 

[A. Nonamus]

That would be the anode connection. GI-10 tubes don't have any dedicated anode; your circuit must turn unused cathodes into anodes. So this GI-11 should be considered an improved design. The metal disc is the main anode and the wire running up the side is so that all cathodes are roughly equidistant from at least some point on the anode, which will balance the striking and maintaining voltages.