Yes! That's exactly what happens. The current through the center-tap is the sum of the anode (segment) current and the grid current. And the peak current through the filament wires is actually *greater* than just the current to heat the filaments.
*Tomasz* - As you found out, those VFDs draw a lot of current. I have a future design for a 6-tube ILC1-1/8 (smaller tubes than the ILC1-1/7) and I'm just going to use a high-current filament transformer with the center-tap at GND. Grids will NOT be pure DC; closer to full-wave rectified around 15-16V. Segment anodes will be pure DC around 36-40V with current-regulators and non-multiplexed. I actually have an Op-amp summer+ADC+Software to monitor the current thru the center-rap on my NIMO clock to determine the tube health, though it's orders of magnitude smaller (30uA per tube). > -- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/b3c45b79-e626-49e7-a110-7706953acbf3%40googlegroups.com.
