On Thu, 13 Sep 2007 04:47:27 -0700,
wrote:

Hi all,

Just an academic question.

What used to be used in Car Battery charger to convert the AC - DC
before silicon diodes/bridge rectifiers came along?

And did they do full rectification or just half wave?

http://en.wikipedia.org/wiki/Metal_rectifier



--
Regards, Paul Herber, Sandrila Ltd.
Electronics for Visio http://www.electronics.sandrila.co.uk/