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/607c24e0-3073-46c2-ad68-0df29ffa099fn%40googlegroups.com.
