1. The KA7OEI FT-817 pages - http://www.ka7oei.com/ft817pg.shtml
** Yaesu FT-817 Portable QRP MF/HF/VHF/UHF Transceiver - http://www.k6xx.com/ft817/ft817.html
2. The End Fed Half Wave Antenna - http://www.aa5tb.com/efha.html
3. New vertical SV5 for (80-60-40-20-15-10) (нова версія вертикальної антени)- http://www.vertical-array.com/en/sv5---sv5-plus.html
4. Черговий випуск ANS-213 AMSAT News Service Weekly Bulletins for Aug. 1 - https://www.amsat.org/ans-213-amsat-news-service-weekly-bulletins-for-aug-1/
5. PANADAPTER For Any Radio DC - 160 MHz SDR Antenna Switch - https://www.youtube.com/watch?v=jKqXBvsrGsI&t=2s
** SDR Transceiver and Receiver Switch Antenna Sharer TR Switch Box with Gas Discharge Protection 160MHz - https://www.banggood.com/SDR-Transceiver-and-Receiver-Switch-Antenna-Sharer-TR-Switch-Box-with-Gas-Discharge-Protection-160MHz-p-1734290.html