On Friday, January 25, 2019 at 3:27:25 PM UTC-8, Tomasz Kowalczyk wrote: > > > I think that the highly positive grid voltage allows to make electron > "beam" hit all anode areas more evenly. If I recall correctly, in some > older VFDs you could see that anodes glow slightly brighter >under filament > wires. > >> >> I noticed the pattern of lighter hair-lines on the phosphor-coated segment anodes would change as the grid voltage was varied; perhaps there is a tradeoff between uniform segment glow and how much energy is wasted thru the grid.
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