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Hi all,
offlate, i have seen some experiments with valves working at less than 10V Dc-- in fact 9v to filament with current limiting resistor and the same 9V to the anode even. they do work-- anode voltage / anode crt curve may not be in the linear region.
so we may give a try at lower voltages instead of expecting 50 and 90V for the anode.
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