I don't sell any of these nor do I receive any remuneration if you buy them, and I have not personally reviewed all of them, they are listed here to give you perspective
it is ILLEGAL in Australia to transmit on Ham radio bands without a license and can result in fines up to $425,000 or 2 years imprisonment
Introduction
most countries do not allow ordinary unlicensed citizens to transmit on any radio bands other than CB 2-way radio and most have other radio bands reserved for use by licensed Ham radio operators
with Australian amateur licences, you can only use these frequency bands: 3.5, 7, 14, 21, 28, 52, 144, 430, 1240, 2400 and 5650 MHz
on passing your Foundation exam and getting a licence you will have your own call sign and frequency allocation, and then you pay an annual fee to renew the licence
most amateurs transmitting outdoors via their vehicles will operate mobile from a motor vehicle on 2 metre and/or 70m cm bands but also often on HF bands where more sophisticated antennas and tuning devices are required.
this requires an appropriately powered transceiver, an adequate portable power supply for the duration of use, and make sure the antennas meet the conflicting demands of efficiency and portability and must ensure that all spares and support material are provided. Antennas for HF bands are usually dipoles or long wires strung between trees or, if you are in a treeless desert, laid along the ground.
QSO
is the term for a two-way radio contact or communication session between two stations
Potential role of ham radio in disasters
even a severe wind storm can knock out mobile phone and internet infrastructure