On November 10, 2021 I registered as a Dutch “radiozendamateur” (ham) with callsign PA8L. You might hear me on the bands, for now mostly on HF, but that can change quickly because I’m exploring this wonderful world of radio communication.

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Loop antenna for medium wave with remote tuning

A tuned loop is a very effective antenna for medium wave reception in an area with man-made noise. However, using such a loop in close proximity to a laptop computer with an SDR (software-defined radio) is not a good idea because the loop will pick up interference from the computer. Therefore I decided to build a loop antenna with remote tuning by varicaps (varistors if you prefer that term), picking up the idea from T.J. Nelson’s article. That way you can move the loop antenna to a spot further from the computer and possibly a spot with lower interference. Outside is best, so I’ll be aiming to build something that can withstand inclement weather (within reason!).

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