Sharp eyes Grahame, and some sharp deductions too... The tube is indeed spinning, quite quickly. So we are looking at a persistence of vision effect, but not one created by a highly specific camera shutter speed - this is what the tube looks like to the naked eye. And neither is the tube being abused with a funky hook-up, it's operating in the manufacturer's reference circuit (might be give or take on the odd component value, I don't remember). It is a commercial tube, not a prototype / developmental tube. Your comment on mica vs ceramic is spot on - the family of tubes of which this is a member do switch from mica supports to ceramics. I have not actually seen an example of this particular type with a ceramic support, but I have no reason to believe they were not made.
So, very nice progress. Anyone able to get us all the way over the line? Jon. -- 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+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/5a136b18-39a8-4365-8041-887b48123785n%40googlegroups.com.
