• June 20, 2014

    K1FM Mini Magnetic Loop

    Disclaimer: if not all precautions are taken, Magnetic Loops can be dangerous. Tensions in excess of a few KV’s can and will develop even when operating at relatively low powers. Fires can also develop .Never ever touch the loop radiator during transmissions! Moreover, the magnetic fields generated by these antennas are potentially harmful to a number of… Continue

  • June 4, 2014

    Mystery signal from a (Police) helicopter

    Reading the May 2014 issue of QST, on page 65, I found a mention of an interesting story about Oona Raisanen OH2EIQ. Oona was watching the helicopter news video of a police chase when she realized that the audio track contained a data feed.  As the very talented hacker that she actually is, Oona managed to… Continue