1. T41 5-band SDR transceiver - https://www.4sqrp.com/T41main.php
2. Morse Code Generator - https://www.aa9pw.com/morsecode/test/
3. Building a UHF Band-Stop Stub Filter (Створення заглушувального фільтра UHF) - https://www.klofas.com/blog/2025/building-uhf-band-stop-stub-filter/
4. Wavelog - https://www.wavelog.org/
5. SDR Television Beta #1 - https://www.sdr-radio.com/sdr-television-beta-1
73 de UT2AB
