I can help, Nick - will PM you. Long-timers here will remember that almost 15 years ago now I did a lot of work on the ETL date code. Dekatrons were my focus, but it's the same code used on all ETL tubes, including these lovely nixies.
Jon. On Tuesday, May 30, 2023 at 5:40:48 PM UTC+1 Nick wrote: > So here's the thing: I'm rationalising my rather large nixie collection > over the next few months.... I don't need lots of every nixie. > > I'm starting with a stash of ETL GR10Gs in varying condition - one has a > broken 7 internally, 3 others are "dark" to the point of ... just > useable... another 10 are in "used but good to OK condition" and the rest > are NIB. > > They're a strange, early, tube, needing a Va of 250VDC and an Ra of only > 10K for most digits, but 18K2 for the "1" and 14K7 for the "7", i.e. the 1 > & 7 also have cathode resistors... They have no Hg doping, so the life of > the tube under controlled circumstances is only 5,000 hours... Early stuff. > > But they are a BEAUTIFUL tube... I mean, REALLY BEAUTIFUL (IMHO)... > > The date codes on them are just two characters, e.g. "OJ" or "RC" etc. > Range of ETL logos too... > > Anyone have a decode table for these? > > Thanks > > Nick > > > -- 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/3d002837-1616-4750-9dc2-21fa104a5e52n%40googlegroups.com.
