A boost converter will be also a lot smaller, even with a big LC filter, which is recommended to keep your B+ free of converter noise. Also, efficiency will be much higher (80% is very realistic).
Are you able to determine current drawn from B+? Is the circuit drawing constant amount of current (class A operation, which is very probable)? When it comes to PCB making, I think you should go with KiCAD or Altium CircuitMaker (I barely used the second one, but it offers limited capability of Altium Designer, which I use at work - unfortunately, license cost is out of private use reach). 67,5V is not very high, but you should use wider spacing between tracks than the standard 10mil. Also, if it is possible, avoid designing a boost converter on the PCB yourself and buy a ready module - half of success of a converter is the PCB layout, which can be really tricky to achieve. W dniu poniedziałek, 7 maja 2018 15:00:18 UTC+2 użytkownik Terry S napisał: > > Kerry, you are asking a very LARGE question. > > I've been designing circuit boards for over 25 years. Well over in fact. > And there is no one quick easy answer on how to do it. It's an art and a > science. But first off, I would comment that there are much better ways to > generate the B battery voltage than that old oscillator/transformer > circuit. Again, topic for much discussion I'm sure. > > There are a plethora of free PCB design packages -- but before you dive > in, check out some possible purchased solutions. I'm sure some of the > supplies offered for nixie clocks could be filtered and regulated down to > provide 67.5 volts for a B+ supply. > > Terry > > On Monday, May 7, 2018 at 7:27:52 AM UTC-5, orange_glow_fan wrote: >> >> Hi Guys, >> >> First off let me say that I know little about porting a circuit design >> into a workable PC board design.. I could probably do this using perf >> board and point to point wiring, but I'd prefer something more reliable >> (and probably better looking) >> >> Having said that, can someone tell me how to do exactly that with the >> pictured circuit?? This needs to be as compact as possible. >> >> It is a replacement for the old 67 1/2 volt 'B' battery used in vintage >> AC/DC tube radios. The transformer is pricey too! I've tried contacting >> the author, but there has been no response. The article was written back in >> 2003, by a radio collector in Australia and I'm not sure if he still >> 'around' >> >> Thanks for your input.. >> >> Kerry >> >> >> -- 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/54248819-52a0-4600-b6ab-a378a0eef048%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
