I just came across this: http://www.glowbug.nl/neon/944125938_2356.gif (which seems to be an excerpt from https://archive.org/details/ElectronicCircuitsManual/page/n209) and would be interested in a critique of it from people who know more than I do about electronics - which is just about everyone here!
The cathode controls are pretty standard fare for multiplexed tubes - including clamping the off cathodes to 75V (it is low enough to stop them acting as anodes, but high enough that they won't glow). I'm more interested in the anode controls. In particular: - Using capacitors to de-couple the 5V signal from the 200V rail (I assume)? - Tying the collector of the transistors to 110V, presumably to keep the voltage across the transistor within its limits, though I'm not sure what actual voltage would be present across them, because: - The anode resistor, which is shared by all anodes here, apparently varies from 180 to 300 Ohms. Is that a misprint? Can it be that low because of the multiplexing? Or is there something else going on here. Naturally now that I've seen it, I want to build it. Like I don't have enough projects going on. -- 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 [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/de5fe944-27af-468d-bc94-c6cc88beb3fe%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
