Tool collection
Field Tools
Portable-station planning tools for power, battery use and practical setup decisions.
Plan the station before you leave
Portable amateur-radio operation puts constraints on equipment that are easy to overlook at a fixed station. Battery capacity, transmitter duty cycle, antenna dimensions, RF exposure and the practical time available at a site all affect whether a field setup works as planned. These tools are intended for quick estimates before an activation, portable contest, emergency exercise or temporary station setup. Battery runtime is a planning estimate rather than a promise because temperature, battery age, converter efficiency and radio behaviour can change the usable capacity. Unit conversion is useful when equipment specifications arrive in mixed units. RF exposure calculations should be treated as a screening step and checked against the regulations and guidance that apply at the operating location. A good field workflow is to calculate the expected load, allow a sensible reserve, verify the antenna and power system on site, and keep measured values or manufacturer data for the final decision.
Tools in this collection
Planning a portable station
Portable operation rewards simple calculations because every unnecessary kilogram, cable run and accessory consumes time or battery capacity. Start with the expected operating period, then estimate receive and transmit demand rather than assuming continuous full-power transmission. Check the antenna dimensions against the site, including the available support height and the space needed for radials or counterpoise wires. RF exposure deserves the same practical attention: identify where people can stand relative to the antenna and apply the rules that govern the station in your country. These tools are deliberately small and independent so they can be used before leaving for a site or when a connection is poor. A calculation is still only a model. Weather, temperature, battery condition, ground conditions and actual radio behaviour can change the result, so leave a sensible reserve and verify important assumptions during setup.
For a portable operator, the best result is one that leads to a clear action: carry enough energy, choose an antenna that fits the site, keep people outside the assessed RF boundary, and leave enough time to verify the station before operating.