1. QRP HF LOOP ANTENNA - http://www.iz0hcc.it/qrp-hf-loop-antenna/
2. Small Transmitting Loop (STL) antennas (конструкція магнітної антени) - https://www.nonstopsystems.com/radio/frank_radio_antenna_magloop.htm
3. VERTICAL DIPOLE FOR 40M (AND HIGHER) - https://www.qsl.net/hb9mtn/hb9mtn_vertdip.html
4. ARDUINO CW decoder - https://www.planker.dk/Projects/Arduino/Decoder/en_cw_decoder.htm
5. Broadcastify Raspberry Pi Image - https://wiki.radioreference.com/index.php/Broadcastify_Raspberry_Pi_Image
