> Thank you for this detailed explaination, even though some is over my head.
That, unfortunately, is in the nature of switching power supplies. There be dragons. > Should I check the resistance between the two joined pins and one of the two > pins on the other side? No, just look up the data sheet for the part you're using. It will give the on resistance, gate threshold voltage, gate charge capacitance, and so forth. A low-end part will offer maybe 1 ohm of on resistance, but such parts will get pretty warm in operation. Less than 200 milliohms is preferable. > Could the over heating mosfet damage other components or will it simply fail? If it fails shorted, it can damage several other components in the process. > I want to be sure there are not other factors contributing to the problem > like me installing the wrong resistor but I am fairly meticulous during > assembly. I assume if something was really out of whack the HV supply would > not run at all. Sometimes spikes from the high current switching can couple into nearby signals and confuse things in various subtle ways. However, the "hot MOSFET" issue, if you have reasonably clean HV, probably isn't an interference issue. > The clock is functioning but the mosfet is getting warm, and I notice it is > mostly when all the tubes are running at the same time. That makes sense, the supply is working the hardest then. > Since I will be giving some of these as gifts I want to make sure everything > is right. Always a good idea! - John -- 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/168FEF58-5859-43EC-B2C5-B3CFDC546583%40mac.com. For more options, visit https://groups.google.com/d/optout.
