@Greg: YES :) It's an IN-1 for sure. Thank you!!! @LB: It's not biquinary. It has 14 leads placed in the glass, but three of them are not used - they are cut very short (one of them is visible on photo), @Chuck: Russian IN-4 has no internal connections between odd and even digits. It has 14 leads and can be used either as a biquinary tube, or a single anode tube, Sorry, I forgot to mention, that the IC is not a driver, but a logic circuit. The driver is missing on the board. So the mystery is solved! My tube is an old IN-1 extracted from the base, then red coated. That brown glue is not a glue - it's an adhesive tape :D
Many thank's to all of you!!! Bartek. niedziela, 19 września 2021 o 00:24:34 UTC+2 Chuck napisał(a): > Biquinary tubes require 7 wires to the outside world. there are 2 separate > anodes, a front screen and a back plate. > The digitsand wired together internally within the tube in (5) odd-even > pairs. Those pairs are 1-2, 3-4, 5-6, 7-8, 9-0 > The evens are near one side of tube, odds near other side. They are > separated by a middle screen which is also brought out. > Must hook a 1 meg resistor from middle screen to each digit pair, so add > (5) 1 meg resistors 1 each from middle screen to > each digit separately. This cuts off ghosting of unwanted digit in any > pair. Make desired anode positive and take the cathode > pair to GND. Appropriate digit will illuminate. They did this to cut down > on driver transistors. Only 7 required per tube instead of the usual 10. > > > > ---- Original Message ---- > From: "liam bartosiewicz" <liambart...@gmail.com> > Sent: 9/18/2021 6:04:19 PM > To: neoni...@googlegroups.com > Subject: Re: [neonixie-l] Re: Please help identifying a nixie tube. > > Could be an IN-4, I’m pretty sure those can be used as biquinary tubes. > > > On Sep 18, 2021, at 2:35 PM, chuckrr <chu...@all2easy.net> wrote: > > > > almost > > -- > 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/158CEF37-98C3-44F0-8755-26E3F85C56FB%40gmail.com > . > </chu...@all2easy.net></liambart...@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 neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/9e7d3010-86f7-4dfd-a087-7b705bb980fan%40googlegroups.com.
