Looking at different websites, translated IN-18 datasheets, I get more and more confused what the correct direct drive cathode current is. Here at tube-tester: http://www.tube-tester.com/sites/nixie/data/in18.htm the nominal current is stated 6mA. On the same site a translated datasheet http://www.tube-tester.com/sites/nixie/dat_arch/IN-18_03.pdf here we see 'Basic electrical parameters', Bad translation of 'Nominal'?. In this table the 'no more than' (=max?) 4mA. The next table 'Maximum operating parameters' is confusing. Anode current at rectified voltage: Is this 50Hz rectified or smoothed DC? And how can a absolute max rating table have 2 values (min 4 and max 8) without any other parameter? And a absolute minimum 4mA?? Minimum drive current = 4mA? A not translated datasheet : http://www.tubeclockdb.com/nixie-tubes/5-in-18-18.html here I see 4-7mA and 2-4 (50Hz/DC, nominal, absolute max ???) My Russian is non existing.. But if I look at most schematics they use a 10K anode resistor, that's about 2mA. Some on the web are stating to keep the current as low as possible, others warn about excessive cathode poisoning with low currents, and recommending 6mA.. Can anyone shed some 'light' on this? Thanks!!
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