I have a pretty good sized collection of RCA DTF-104B Numitrons, which I think are especially attractive - they're large digits, in a flat-topped end-view tube. They're quite rare now, and in fact I think I have most of the remaining world stock of these things (around 150 or so). Although I've successfully used them in a couple of projects, I've never been able to locate a data sheet for them - does anyone have any pointers for this specific tube?
Thanks! ~~ Mark Moulding [image: WoodClock (Small).JPG] On Tuesday, October 26, 2021 at 2:21:21 PM UTC-7 Dekatron42 wrote: > I knew I'd seen the number, and found them just now: > http://www.tube-tester.com/sites/nixie/dat_arch/Numitron_RCA_01.pdf at > the bottom of the page, they are development numbers for the DR2200 series. > > /Martin > > On Tuesday, 26 October 2021 at 22:21:47 UTC+2 Dekatron42 wrote: > >> Tubes designated DTF are development numbers used by Apollo/RCA - it says >> so at the bottom of their datasheets. >> >> /Martin >> >> On Tuesday, 26 October 2021 at 21:43:52 UTC+2 Bartek Ogryz wrote: >> >>> Hi! >>> They appeared on eBay last days: DTF137, DTF138, DTF140 (or maybe >>> DTF/37, DTF/38, DTF/40). What are theese? Anyone has some more knowledge >>> about them? >>> >>> Bartek. >>> >>> BTW: If someone is interested in numitrons, quite rare Apollo DA-2500 >>> are hiding on eBay: item no 254866404573. Unfortunatelly, as the seller >>> told me, all that have left, are without markings... >>> >> -- 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/1baae699-e553-4f02-95f7-9b6b07cbee90n%40googlegroups.com.
