Converter In-Rush Thermistors etc, UPDATE -4
UPDATE on 17 Nov, Update 2 on 22 Nov, Update 3 on 16 Jan 14, Update 4 on 19 Oct 14. --------------- In a recent thread there was mention of how you can wreck your gizmo (in my case a converter) ...
Forum Discussion
BFL13 wrote:
I cannot remember a failure from a cold start with any of the different size thermistors, only with a hot restart.However, since the converter runs ok after the thermistor has blown, which I have seen with a hot restart and the lid off so I can watch the thermistor go up in smoke; then with the cold starts and the lid on so I can't see the thermistor, I cannot state for sure that the thermistor did not blow after a cold start and just keep running so nothing seemed wrong.
Hmmmmm. In all of this discussion about resistance, we're talking about the zero power resistance, i.e. the cold start resistance. None of that is particularly relevant if it's a hot start problem. If I was trying to just solve the problem, and wanted to save money (as I always do) I'd be inclined to put some 2 or 3 ohm thermistors in series and tack in a time delay bypass relay (or just be really careful with hot restarts, then see what happens. My junk box is big enough I've got all those items in there. :)
If I was more interested in the electrical puzzle, then I might start watching things with my scope to see if I could figure out what was happening that was causing the failure. However transients are hard to find.
