HWEF UnUn + Choke Box 40-10m (6m)
thingiverse
Update: V2a added - a few mechanical improvements and three connectors for taps. My box to combine a 1:xx UnUn and a Choke for /p usage. Works from 40-10m (in my case even up to 6m according to measurements). Extra features: Simple clip on coax guidance, to keep coax away from counterpoise Mounting hole to lift the box (between banana outputs) Technical data: Core: 2* FT140-43 47+22pF ceramic caps to compensate for inductive influence of UnUn 2 Outputs Red for about 2k8 Ohms (2:15) Yellow for about 2k1 Ohms (2:13) Counterpoise Connector: Black Choke: 16 turns RG174 (use better one, if available) Provides >30dB common mode current suppression Screws: M3x12 or M3x16 self cutting
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