1. A Miniature VSWR Meter for QRP Portable Use - https://www.yagicad.com/Projects/minivswr.htm
2. QRP DX over 10.500 km with 8W & Magloop Ant. (Xiegu X6200) - https://www.youtube.com/watch?v=ZqAYI3lrhIo
3. Online Calculators - https://www.66pacific.com/calculators/default.aspx
4. Morse Code Course - https://morsecode.ninja/learn/index.html
5. 4SQRP Paddles - https://www.4sqrp.com/kits/4S-Key/4S-Key-Builders-Manual.pdf
** T41 5-band SDR transceiver - https://www.4sqrp.com/kits/T41/4SQRP%20T41%20Assembly%20Manual%20-%201-5-24.pdf
73 de UT2AB
