Most of the components where kept identical, even the cathode resistor, but the resistor on the a1 output anode was raised to some 560k as this signal was mostly used to directly reset the E1T via a capacitor directly to the D' and a2 electrodes, the capacitor value was selected according to what counting frequency you were after (330pF-1nF). The other voltages were also raised accordingly 15.8V(11.9V), 208V & 226V (used for limits for the pulse voltage on the D electrode).
Sticking to the datasheet is the way to go when you count at slow speeds, below the usual limit of 30kHz, but with troublesome tubes the extra 10k potentiometer is a good way to weed out the really bad ones, just as when you want to weed out the ones that don't count much further than 30kHz and the ones that sometimes miss a counting step but works fine otherwise. Really nice that the case design will have different possibilities! /Martin -- 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 [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/252715da-5fd1-4883-8f02-441caa3305f3%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
