Amateur Radio

AC6V Amateur Radio & DX Reference guide
ICOM radio manuals
RigPix – database of radio and accessories information
Mods.dk – manuals & modifications for radio gear
https://www.cqgma.org/mvs/ For World Wide Flora and Fauna (WWFF) parks world wide, try GMA Maps. Pan to the area you want to look at then select VK Australia.
https://www.metric-conversions.org/length/feet-to-meters.htm Often amateur radio construction articles provide measurements in feet and inches. This is a handy website to convert dimensions to metres and centimetres.
QSO Shack – A collection of great information on a variety of subjects, including a Quick Start Guide to WSJT-X, various antenna designs and construction advice of building the QRP Labs Ultimate3S US3 Beacon.
Martin K7MEM Electronic Notebook – very useful information including antenna design for End Fed wires, T2FD, antenna matching unit and power supplies. Well laid out and explained.