Active ferrite rod antenna for HF

  
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The red connector is for an optional external antenna wire and the black connector is for a ground wire. The red is wired to secondary winding and the black is connected to the circuit ground plane. Additionally two by-pass capacitors (100n) are soldered from different +9V locations to the GND plane for stability in high gain setting. The ferrite
Active ferrite rod antenna for HF - schematic

is Amidon R61-050-300. Click the pictures.



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