Amateur Directories

QRZ – This is the go-to online directory of Radio Amateurs in the World – https://www.qrz.com/

Propagation and DX Tools

PSKreporter – Shows your propagation on FT8 around the world – https://pskreporter.info/pskmap.html

DXcluster – A traditional way to find DX stations calling – https://www.dxheat.com/dxc/

Online Logs

ARRL Logbook of the World (LoTW) – https://lotw.arrl.org/lotwuser/default

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Resources for Equipment

Retevis RT-3S

OpenGD77 – The Open Source Firmware pages – https://www.opengd77.com/archive/index76ff.html?sid=

Yaesu FT-100d

Yaesu FT100 FAQ / Knowledge Base – https://k0lee.com/ft100faq.php

VHF Antennas

Phasing VHF and UHF Dipole Antennas – https://products.rfi.com.au/phasing-uhf-and-vhf-dipole-antennas