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Box for a balun or unun of your desired configuration wound on a FT240 toroid. Features: M5 bind terminals with winged nuts used to quickly connect or disconnect antenna radials. The ring with 8 holes in the middle of the bottom part is…
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A 49:1 box for an end fed antenna printed 3 perimeters, 6 top and bottom layers, infill doesn't matter. Category: Electronics
Thanks to Lukáš OK1ECH and his excellent universal balun/unun box. I wanted to make a RF choke (or 1:1 unun), and since he posted the f3d file, it was easy to update to add two coax ports (SO-239 or similar). I also changed it to M3…
This is a nice FT240-31 choke box I use. It uses panel mount connectors as the rg58 I use cannot support the weight of the box, I have had 3 boxes where the ground broke loose from the connector so I went panel mount so I could use an…
