QRP EFHW Wire Winder and Transformer Case
thingiverse
I wanted a wire winder and unun case for my very small, very efficient transformer. With smaller cores, you need a cover over the core. Since it's wound with 22 gauge wire, it can't just be left in the open. The cover snaps in place without hardware. The core is a Fair-Rite 43 mix that's very tiny. Part #2643625002 I was able to find the cores on DigiKey. https://www.digikey.com/short/r779q9r7BNC Connectors: https://a.co/d/3cyNjeEBinding Posts: https://a.co/d/aDFm5LBThe winder is small enough to fit inside my KX-2 Case. Here's a video detailing assembly: https://youtu.be/fNqv0rUlMPU?si=IGBaD9XSw1zV2hJ3
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