Jeff, What about the 1979 (7905) IN-18 tubes? (I have a NOS bunch of them)
Chris 'Turbokeu' On Monday, 2 July 2012 15:31:21 UTC+2, Jeff Thomas wrote: > > Speaking from considerable experience; you must drive the older date code > IN-18 tubes at beyond 5ma cathode current to limit the effects of cathode > poisoning. > The 1980-1983 production tubes are a particularly nasty batch, tending to > form oxides on active cathodes in spite of the excessive current. > > The 1989-1991 production IN-18's are the best, and typically will operate > problem-free at <4ma. > > I had thrown away hundreds of older date coded IN-18 tubes because of > recurring oxide poisoning or frit seal leaks. > > I'll wager that Dieter also has a growing bin, laden with stinkers ;) > > Regards, Jeff > > > > On Monday, July 2, 2012 2:43:43 AM UTC-7, marcin wrote: >> >> So, where is the catch in this: http://www.ebay.com/itm/310407744076Looks >> fishy. Of course I have no affiliation with this seller nor I ever >> bought anything from them. > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To view this discussion on the web, visit https://groups.google.com/d/msg/neonixie-l/-/0uWYcz_A7pkJ. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
