Looking at the schematic, the car 6V power (assumed negative ground) feeds the center tap of the step-up transformer. The 2 "outer" windings are connected to the 2 poles of the vibrator. First guess is that the vibrator alternately grounds the 2 sides of the primary with a square-wave alternate phase signal that is stepped-up by the transformer to around 220V. You could build a 2 transistor + osc (555) into the existing can (figure out the frequency so the transformer isn't too unhappy. If shoot-thru is a problem, a small PIC could generate any signal needed.
Don't know if this helps (no direct cross) but a quick email may yield something. http://www.royalsignals.org.uk/vibs/ -Other Bill- On Friday, June 21, 2019 at 2:46:10 PM UTC-7, orange_glow_fan wrote: > > Hi Guys, > > Need to replace the vibrator based DC-DC 'converter' in an OLD (1952) > Grundig car radio (in a Mercedes) I'd like to use something more > modern..and reliable! The vibrator is a 5 pin version that I am unfamiliar > with and I'm guessing it's made out of 'unobtanium.'.. (might be > synchronous?) > > The board needs to supply around 225vdc. to a 5 tube radio. (no need to > supply the filaments) The rub is that the car is 6 vdc. Is there anything > on Ebay (or??) that would work? > > I've included the schematic for informational purposes... > -- 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/edfccb5a-d08b-41e2-86ce-0cdc0da08e57%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
