(Continued from Part 2. This concludes the article.)
Antennas
As an example, factory broad band antennas can suffice, yet performance in terms of propagation and receive will be lacking, and the overall range shortened, and the transceiver’s life possibly shortened. And there are other issues to consider. The crude, yet effective Baofeng UV5R does not power back given an excessively high Voltage Standing Wave Ratio (VSWR) from an antenna, and this situation will shorten the life of the ‘finals’ of this transceiver. If the back side of a Baofeng UV5R becomes warm to the touch, stop transmitting, drop the power setting to low power, or install a properly tuned antenna, or better yet, an antenna that is located as high up as possible, and use the lowest power setting that make communication possible. This is an example of why we need a basic understand of how transceivers work or do not work well, and how to use them correctly.
Even if we can not make antennas, we need to know that we need to use the correct antenna for a given frequency range, and how use an antenna to limit or extend the range of the transceiver. Often, shorter antennas that limit the range are the most appropriate if we seek to improve COMSEC — that is, when we need not have a range beyond our perimeter. Knowing when to attach an antenna that propagates further is the correct choice and is also a part of what the operator needs to know.Continue reading“Using Military Principles to Improve Civilian Radio Comms – Part 3, by Tunnel Rabbit”