Nice that the SMPS made it run cooler. I didn't expect it to fix the ghosting issue - that's probably a timing issue in the software, as I explained earlier. Would have been very strange if that had been related to the 7805.
As for the hot mosfet: can you check Q4? It's the small transistor nearest to the mosfet. Is it connected correctly? Any issues with it? Can you check the solder joints, and touch it to see if it's hot at all? If that transistor isn't working (or if it wasn't installed correctly), then I would expect the mosfet to get hot. Check the part number on it (make sure it's the correct one), and also cross check with the datasheet of that component and the schematics of the clock, to see if it's correctly installed. Let us know how it progresses! These posts are becoming like a good detective series ;) On Friday, April 10, 2015 at 5:12:31 PM UTC+2, Kiran Otter wrote: > > Well.. I replaced the voltage regulator with JT's part, it appears to be > working perfectly.. a solid 5V right on the mark. I also replaced C1. > > The ghosting numbers are still there but very faint.. but the MOSFET (M1, > an IRF640) is still getting extremely hot. You know when a component gets > so hot it has that hot-electronics smell? It's that hot. The voltage to > the tubes is right on 170V. I didn't have to adjust it after replacing the > two components. > > Should I replace the MOSFET? Any other suggestions? :) > > Kiran > -- 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 neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/9f9d2f7c-32bd-4698-8421-f5e5cf0ecfe4%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
