- Psi Upsilon Fraternity: Chi Delta Chapter Thanks for stopping by the Psi Upsilon Fraternity, Chi Delta Chapter home page! We're here at Duke University, living in House AA. You can find out more about us and our school by using the links above. (If the Navigation Bar dosen't work, please turn on JavaScript support in your Preferences or follow this link to the Site Map.) Please send any ...www.duke.edu/psiu