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I need to build a 22uH inductor for a SMPS. I have a PQ2625 bobbin and N87 Core. I am using 12/29AWG Litz wire. Can someone help me with the turns and gap? I would appreciate any help.

I am new to SMPS and am trying to learn. I wanted to start out small. I took a SMPS that I had using the UC3842. Then drew out the circuit and checked it twice. Then I checked it again :D The only part I am unsure of is D2, it was unmarked. C9, and C10 measured 480pF so I figured they must...