I'm guessing that CRT-style manufacturing, where phosphor is deposited on the tube-face, was well-established technology in the 1960's due to massive production of TV's. On the other hand, VFDs were emerging technology because the much smaller size required tighter manufacturing tolerances, and depositing phosphor onto a conducting anode was still being perfected. Yes, this was done for magic-eye tubes, but they had a very short lifespan, maybe a few hundred hours. I'm sure the chemical composition of VFD phosphors was also under development; they are much brighter than magic eyes and operate at a lower voltage.
On Wednesday, February 8, 2023 at 3:22:24 PM UTC-8 marcin wrote: > Technically this device could be quite trivial. Simpler, and less > demanding tolerance than Nimo. Just one flood gun with grids controlling > the segments (as reported by riffuchs from > https://riffuchs.livejournal.com/153725.html), plus some internal > stencil-style screening between the 'segments'. Still VFD does the same > only so much easier. So, why? Longer lifespan? Brighter? Fulfilling > insane-price requirement for a military order? > > Pity the price, I love absurd technology. Anyway, seems that such device > was sold on ebay de in 2014 for 'pennies' (radiokot.ru > <https://m-radiokot-ru.translate.goog/forum/viewtopic.php?f=3&t=27324&start=4660&_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=wapp>), > > but I can barely understand what they were actually talking about there, > even with google translate. I wonder if it was the tube(s) from riffuchs > - riffuchs seems to be from Germany. > > Marcin > > > On 8/02/2023 02:27, Olivier wrote: > > I found this old page <https://riffuchs.livejournal.com/153725.html> > It shows the same pictures as the ad! Strange. > > Olivier > > On Tuesday, 7 February 2023 at 6:36:26 pm UTC+8 marcin wrote: > >> Hi Guys, >> >> have you seen this EEV E727G contraption on ebay >> https://www.ebay.com/itm/115697380857 ? >> I have never even heard about it, nor can find any info about it. >> >> Marcin >> > -- > > 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+...@googlegroups.com. > > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/190723b9-a698-46a9-a6e9-feaf8e68f6e6n%40googlegroups.com > > <https://groups.google.com/d/msgid/neonixie-l/190723b9-a698-46a9-a6e9-feaf8e68f6e6n%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/45434b96-7e8c-494e-8dca-4d2be213e423n%40googlegroups.com.
