I like the general idea of what your attempting, but it's really not suited to segmented tubes like the B7971.
The Burroughs data sheets for the valve clearly state the currents for each segment and give examples for the differing cathode resistors to use to achieve this on a per-cathode basis. There is no "right" single anode current for a B7971 - they are also pretty bullet-proof - I've never known one fail and have several hundred out there. Bearing in mind that all known B7971 are ex-equipment, I would stick with the Burroughs recommendations on those. For single-cathode digits, a current limiter would be fine. Cheers 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+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/b5652fe1-0436-42b1-9607-50b623c3b5a7%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
