> Thank you John, I already have a ferrite on the powersupply cable. I think > I'm going to manage the noise with the housing.
Depending on whether it's radiated noise or inductive noise, you might need to use a ferrous (steel) housing. Any conductive housing can block radiated/capacitive noise if it's grounded properly, but if you're fighting inductive (magnetic) coupling, you'll want something that blocks it. Since you mentioned WiFi, I think you'll be fine. > Trying the Clock in a Dark Room; It seems like when the 74151 in displaying a > blank "output A" the tube is not completely off; but is glowing a little bit : > - Is it normal behavior, because the 74151 just drop the voltage by > 100V and not to 0V > - Do I have to worry and remplace the 74151 because it's leakage ? I'll assume you mean 74141 here. The short answer is that it is normal behavior, the outputs do clamp instead of going completely open circuit. You don't need to replace the chip. This is also one of the difference between 74141 chips and the otherwise-compatible Russian K155ID1 chips - the Russian chips clamp to around 100V and show less glow than the original 74141s, which clamp closer to 60V. If your goal is to actually turn a tube fully off, you'll need to switch the HV (either the supply or add an anode switch of some sort). - John -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
