Thanks alot for the help everyone. I finally got the full-wave rectifier to work. The problem was that the o-scope was grounding out the circuit. The startup current may have also been a problem. To elimate this, I used an auto transformer to turn up the ac voltage. Can anyone tell me how to make a differntial measurement where I can see the entire signal on one channel? I made a differential measurement by connecting both channel 1 and 2 negative wires to the common of the circuit being tested. Then I measured across the load using the positive wires from each channel. The o-scope showed the signal, but it had to be added to get the entire signal. I have attached a picture of the o-scope I am using. Thanks again for the help.