Hi Ren'e, I made a reverse engineered schematics and also checked what J.B. Dance wrote about these tubes in his book "Electronic counting circuits", but I can't get the reset to work properly on my tubes. There must be something I am missing in the design of how the reset should work as I now have more than 20 of these and similar modules from different manufacturers plus a handful of new unused tubes of different sorts and still the reset is eluding me.
I am driving these modules with transistors and I am starting to wonder if I am either driving them to quick, to steep level changes or of there is something else that I am missing, there are examples of driving them with transistors in the Burroughs documentation and also in the J.B. Dance book but only with older "slower" transistors compared to modern ones I use so that might be the problem. I have made the flanks of the signals as slow as they should be but there might still be something I have done wrong. If you want to share your schematics I'd be happy if you could email it to me. I can make PDF-files of the reverse engineered modules that I have done so far and email you. On 9 Okt, 19:32, kahlo <[email protected]> wrote: > Hello, > > here the connections (I have got it from Mike and removed one > error...): > > Bottom Connector (left-to-right, viewed from rear): > 1 - Filaments, 6.3V > 2 - Filaments, 6.3V > 3 - B+ Supply, 300V > 4 - BD Tube Clear (0.001uf cap coupling to BD-301 cathode) > 5 - Input (50-60V negative pulse, rising edge <1usec) > 6 - Cascade Output > 7 - N/C > 8 - Ground > 9 - N/C > 10 - BD Tube Reset (24pf cap coupling to BD-301 spade 9) > > Top Connector (left-to-right, viewed from rear): > 1 - Spade/Nixie Cathode 0 > 2 - Spade/Nixie Cathode 9 > 3 - Spade/Nixie Cathode 8 > 4 - Spade/Nixie Cathode 7 > 5 - Spade/Nixie Cathode 6 > 6 - Spade/Nixie Cathode 5 > 7 - Spade/Nixie Cathode 4 > 8 - Spade/Nixie Cathode 3 > 9 - Space/Nixie Cathode 2 > 10 - Spade/Nixie Cathode 1 > > I have not tested the reset yet, the tube simply starts counting in a > random position. > > Regards, > René. > > On 9 Okt., 14:35, Dekatron42 <[email protected]> wrote: > > > > > Hi, > > > Could you please post the schematic for yoru connections. If you have > > succesfully been able to drive the reset wiring giving correct resets > > I'd be interrested in that too. > > > Regards- Dölj citerad text - > > - Visa citerad text - -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. 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.
