After 1957 ETL was owned by Mullard. The date codes for Mullard (Philips) tubes are described here <http://www.audiotubes.com/mullcode.htm>. It looks most likely that the first digit is the year number, the second letter is the month. The one I have is labelled 0B, which I would read as February 1960. Its a bit of a mess though.
On Tuesday, May 30, 2023 at 1:15:02 PM UTC-4 gregebert wrote: > > but there is a set of 6 matched GR114/CD47s (will sell only as a set) > > loads of NIMOs > > Well, that's going to be the auction of the century. > > On Tuesday, May 30, 2023 at 10:06:59 AM UTC-7 Nick wrote: > >> Thanks for asking, but I really don't know yet. There's a HUGE number of >> tubes to go through (many 1000s). A few of the exotica have been sold to >> other collectors, but there is a set of 6 matched GR114/CD47s (will sell >> only as a set) amongst the stuff in the store, plus many other rare tubes. >> >> I'll start doing auctions in a few months and will provide early warning >> here. Some of the stuff is extremely rare, including F9020, NEO-5000M, >> NEO-8000, loads of NIMOs, Pandicons, Pixies, Panaplex, Alphanumeric tubes >> etc. >> >> On Tuesday, 30 May 2023 at 17:55:20 UTC+1 Robert wrote: >> >>> Hi >>> >>> What would the cost be per tube, used or NIB? >>> >>> Thanks >>> Rob >>> >>> On 30 May 2023, at 17:40, 'Nick' via neonixie-l < >>> neoni...@googlegroups.com> 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 neonixie-l+...@googlegroups.com. >>> To view this discussion on the web, visit >>> https://groups.google.com/d/msgid/neonixie-l/39c22549-5fab-417d-8518-7888e39cb62en%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/neonixie-l/39c22549-5fab-417d-8518-7888e39cb62en%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/9a1c41bc-61da-44f6-b6a9-d800f57a6318n%40googlegroups.com.
