please try to set 1:5 

**@usersupport,** "please try to set 1:5" I don't think that's the problem. The transformer model has no limitations on the turns ratio. This simulation schematic works fine:  And this:  **@minenhlek, ** There is something else going wrong in your simulation. I suspect that it may be that you have used a transformer symbol which is not from the Commonly (Used Parts) Library or the Shift+F Spice Symbols Library in SIM mode or may be User symbol with an incorrectly formatted spice model. However, to diagnose it properly, you will have to make the project public and share the link to it in this topic. See: [https://u.easyeda.com/forum/topic/How-to-make-a-Project-public-and-share-the-links-to-it-9f006513b84b412580910905b0281d20](https://u.easyeda.com/forum/topic/How-to-make-a-Project-public-and-share-the-links-to-it-9f006513b84b412580910905b0281d20)