The clock has arrived! It's Huge! It seems like the clock was in the process of being stripped for parts when it was saved. The tens of hours board was covered in nasty flux, probably the plumbing kind. I've cleaned it up and put it back in. I've created a schematic for the display board and will start working on a replacement. While the display boards are all the same the control boards attached to the back of them are all different depending on which digits are needed. I can tell this is a 12 hour clock since the tens of hours digit can't form a 2, interestingly most for the tubes on that board have never been used. Since the display boards and the controller boards are separate I can replicate the display board the way it is. I will create a replacement control board for my clock and will also create a more modern control board for use with the spare display boards I will have.
The IN-28 is an odd nixie, it runs at a higher voltage and has a control grid. All the groups of control grids are connected to the HV supply through a 3.9M resistor and to the chips through a 1M resistor. I'll have to figure out what all these chips are and find a modern equivalent. If any Russian speaking members of the group can help identifying the chips I would be super grateful. -- 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 [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/9d8be5dd-557d-4f6e-8540-cd37966e6a3c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
