Jorg - Are you using AC, or DC for your filaments ? I use a center-tapped 2.5V transformer, with a series dropping resistor and fuse, for each tube filament. The center-tap of the filament transformer is driven to a DC voltage to set the correct bias.
I have my NIMO board running with 4.8 volts of bias, meaning that when a numeral is off, it's at -4.8VDC relative to the filament. Since my driver uses a 10V supply, when a numeral is on, it's at +5.2VDC relative to the filament. It takes some experimenting with those values, and the anode voltage, to get the best image. Right now I'm using 1980V for the anode supply, and I'm measuring around 30uA average current. Some numerals require more current than others. Here's an old youtube video from last year, and there's no ghosting: https://www.youtube.com/watch?v=2wEjHpj6gkg -- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/1664b5be-488a-44bd-bc9e-0323237e5964%40googlegroups.com.
