On 17 Nov, 23:34, jb-electronics <[email protected]> wrote: > > I would like to mention pro-forma that GI-21 does have an anode. It is > > not a front grid but it is there. > It does? This is new information for me. When I made the pictures for > the GI-21 site
OK, I took my GI-21 out of its box and ran tests: GI-21 has 11 pins in its base. Ten are connected to the respective digits and the 11th to those four vertical rods. You can clearly see these rods on Jens web page. If I pull up the rods I can lighten up any digit except '4' and '8'. To Lighten '4' and '8' it's necessary to pull up some other digits. Probably when I was playing with the tube before I simply missed the '4' and '8' issue and came to conclusion that that the rods are true anode. Now I have to withdraw it: GI-21 doesn't have an anode. I don't know for sure what is the purpose of the four rods. They may help to completely lighten up the digits, or they are just a construction elements. Seeing NU application note specifically for GI-21 would certainly help. Marcin -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
