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Please help me with this circuit error

Attached is the circuit and screen shot of the error.

What am I doing wrong?error.JPG

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Message 1 of 3

Hi Boetabrad,

try to put at least one small resistor (i,.e. 1 microOhm) in one of your secondary coil winding outputs.

Hope this will help you to solve the problem.

Have a nice day...

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DD6 Configuration with resistor.png

Hi Boetabrad,

Here is a screenshot of the simulation. I added the  connection between a1 and U2 and added the resistor to the secondary output b1.

I think the connection a1 to U2 is necessary to measure any voltage with U2 and U5 in the Dd6 configuration.

Message 3 of 3