At 02:57 PM 11/9/2009, Carl Denk wrote:
>Probably I can check the resistance of the transformer windings. I'm 
>pretty sure it's center
>tapped, then the resistance of both sides should be close. :)

Not necessarily.

The resistance will be similar if the windings were done 
bifilar-style.  They can be significantly different if they are done 
as one winding on top of the other - the outer winding uses more wire 
and therefore has a higher resistance.

Your better bet is to measure the voltage from center-tap to each end 
of the winding while under load.

dwayne

-- 
Dwayne Reid   <dwayner@planet.eon.net>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
(780) 489-3199 voice          (780) 487-6397 fax
www.trinity-electronics.com
Custom Electronics Design and Manufacturing

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