They're definitely not Numitron (or other filament) tubes. I use *a lot* of Numitron-type tubes, and these have segments that are too wide (Numitrons are just a filament wide) and too uniform in brightness (even with a filter, Numitrons are brighter in the center, and also the ends tend to be noticeably dimmer). The illumination profile of these does look a lot like VFDs; especially, notice the decimal point - it's big, round, and uniform. I wonder if the shielding plate surrounding each of the "filaments" is performing the same function as the screen in a Nixie? ~~ Mark Moulding
On Saturday, May 16, 2020 at 3:05:57 AM UTC-7, David Pye wrote: > > They don't look like VFDs to me, there is no obvious grid or heated cathode > Are they not numitrons? > > David > > On Sat, 16 May 2020, 10:45 Mattelec, <mario.cor...@gmail.com <javascript:>> > wrote: > >> After a quick search of nixie tubes in eBay, found an add of a japanese >> calculator which appear to use orange VFD tubes. >> No colour film is over the tubes, so those are quite interesting, maybe >> some type of filament tubes? Have you ever seen something similar? >> >> Might be some kind of nixie tubes >> >> >> >> <https://i.ebayimg.com/images/g/0voAAOSw4Yteurlv/s-l1600.jpg> >> >> -- >> 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 neoni...@googlegroups.com <javascript:>. >> To view this discussion on the web, visit >> https://groups.google.com/d/msgid/neonixie-l/f977e62e-3886-4620-a745-199bc4225778%40googlegroups.com >> >> <https://groups.google.com/d/msgid/neonixie-l/f977e62e-3886-4620-a745-199bc4225778%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- 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/a1b3370d-772c-4a9e-8d3a-680831ac057d%40googlegroups.com.
