I'm wondering if there's something we're not seeing on the diagram which is responsible for the observations - either on it's own or in combination with the 4K7.
So, short out the 4K7 - does that materially alter what you see? Second, tell us more about how Vc is generated - is it a reasonably stiff source for the kinds of currents needed here? Are you sure the voltage applied to the base is actually the value you are expecting it to be? I've played extensively with these tubes and also the IN-9, and my experience is the same as Mike's with respect to the current - I can't think of an example where I didn't get a full scale signal out of an IN-13 with 4.5mA to 5mA going through it. They get a bit non-linear right at the top end, but other than that work fine. Jon. >> -- 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/dd670651-a8f7-4482-8d9e-4b701d321da0%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
