That looks really nice, what does it do? If you’re interested in minitrons, you can find them in used avionic equipment.
> On Oct 28, 2021, at 1:26 PM, peter bunge <[email protected]> wrote: > > Would anyone care to sell me an end view Numitron (DTF104B) to add to my > vintage digital working display? > I would also like a DIP 7 segment incandescent display, or anything > interesting not in the picture. Nothing too new. > The LED Bargraph and Magic Eye react to ambient sound. > <20210803_093913.jpg> > > > On Thu, Oct 28, 2021 at 1:41 PM Mark Moulding <[email protected]> wrote: >> Er, you're not the only one with a stash of these.... :) >> >> I'm glad to hear that - it means that there will be other projects showing >> up with them. One of the reasons I like Numitrons so much, besides being >> incredibly easy to drive, is their longevity. At rated voltage (which I >> don't actually know for these tubes, but expect to be around 4.5V), they >> have a rated life of 100,000 hours, and that goes up rapidly to infinity at >> slightly lower voltages. There's also no cathode poisoning or other issues >> to worry about. This all means that I'm comfortable building something with >> the last of an unobtanium part, knowing that it won't need replacement in my >> lifetime. >> ~~ >> Mark Moulding >> >> On Wednesday, October 27, 2021 at 11:02:53 AM UTC-7 Pramanicin wrote: >>> Er, you're not the only one with a stash of these.... :) >>> >>> They are nice looking tubes... >>> >>> On Wed, Oct 27, 2021 at 10:50 AM Mark Moulding <[email protected]> wrote: >>>> 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 >>>> >>>> >>>> >>>> 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 [email protected]. >>>> To view this discussion on the web, visit >>>> https://groups.google.com/d/msgid/neonixie-l/1baae699-e553-4f02-95f7-9b6b07cbee90n%40googlegroups.com. >> >> -- >> 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 view this discussion on the web, visit >> https://groups.google.com/d/msgid/neonixie-l/297852cb-0da5-4396-9e67-f98fde319dfbn%40googlegroups.com. > > -- > 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 view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/CAFxqQo%2BJSdA9yFS9643rtwMG-iVhsT_%3DfU55uY26DVxUu1OvtQ%40mail.gmail.com. -- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/6048A2A9-C804-4568-A36B-683B3920C482%40gmail.com.
