> Reading a bit more about how Gottlieb used these displays, they put the > filament AC voltage on an 8v DC offset pedestal for the big displays and 5v > DC for the smaller VFDs. Is this going to be necessary if I am using a 0v-5v > AC filament that never goes negative?
No, shouldn't be necessary. It's nice to have the filaments a little bit positive, so grounding the anodes/grids gives a good solid turn off (effectively, negative bias). Running them with 0-5V gives an effective -2.5V bias, which should be sufficient (the transformer-derived AC doesn't have that built-in bias). You can, if you want, AC couple the drive and float it higher to reduce ghosting, but I doubt it'll be necessary. - John -- 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/50823028-7ED1-4055-91E5-574DAB813F34%40mac.com. For more options, visit https://groups.google.com/groups/opt_out.
