On 13/12/2013 10:20, pedro wrote:
The Braun Triumph 3738 toothbrush and 3731 charger use an inductive
coupling arrangement to charge the toothbrush battery. Right now
SWMBO's unit isn't charging and I'm tasked with fixing it. Does
anyone know if this operates at line frequency or something higher?
(That will help sensing the field from the charging base to verify it
is operational before I disassemble the toothbrush itself.)


With an OralB charger base,DVM Fluke 77 and 1mH small choke near the
spigot of the base ,
measured 0.45V ac, HF not mains frequency but Fluke still registered
something