On Fri, 13 Jul 2007 15:44:10 +0100, "STRUDWICK.FAMILY" <[EMAIL PROTECTED]> wrote:
>Barry > >The reason that the toothbrush doesn't work any more is that because of >all the jaggedy bit (also known as harmonics) cause the coil in the base >to get hotter than it is designed to get and it melts. Other units can >get hotter on a inverter supply than they would on a household supply >but in general this is not a major problem. > >Paul But if the output of the invertor was fed through a 1:1 transformer, this would remove some of the harmonics - but would it be enough I wonder ?. Why - because a transformer is an inductor and the impedance goes up with frequency. anyone tried it. Malcolm -- Malcolm
