(Before It's News)
When it all hits the wall, one thing you should be sure of is that someone is listening to every communication you make within reception range. Many will use scanners to try and find you or your group. If they hear radio activity, especially activity on the short-range radios, they will know you are near. Some will use direction-finding antennas to get your exact location. The idea with radio comms is to use the least power and radio with the least range that will get you reliable comms. If all has gone south, you will want to use radio only when necessary, and then keep your conversation short and don’t transmit from your base; do so from a distance, if possible. The first radio suggested is the Trisquare brand. It can be used anytime without being discovered, except by the military if they are looking for you and have radio direction-finding equipment within range, but the chances of that are slim. The Motorola 900 MHz spread spectrum radio is another option, if you have the load of money to buy them, but they really won’t transmit too much further than the Trisquare, as they are all limited on the amount of power they put out. Though out of production, the “Trisquare” radios can still be found for decent prices and are a MUST HAVE. They make two different kinds, both spread spectrum, but I don’t think the lower priced ones will do text messaging. These have up to a three to four mile range over open areas (and sometimes more if high up or less if there are buildings), and they will not transmit to someone over a blocking hill. The great thing about these radios for use within your land, compound, on field operations, or whatever you choose is that the signal is “Spread Spectrum”. This means that outside of very specialized expensive scanners, used close by, no one will ever know you are on the air. The frequency “Hops” or changes thousands of times per minute and is not picked up by scanners or other radios. This way, no regular scanner or other Trisquare radio can hear you unless the Trisquare radio is programmed with the right codes– ones that you make up. The radios can be linked by a common code, so that all can hear your transmission or you can just transmit to one person in a group of radios. They also permit short text messages for total quiet. They operate in the 900 MHz range, so they have short antennas. To modify the antenna is illegal, but if all goes south and there is no rule of law, that does not mean you cannot get “BNC” connector that you can epoxy to where the antenna was after removing it, then buy a gain antenna from one of the many Electronic-Radio antenna distributors with a BNC mount. Get these in advance, and be sure the antenna is made for the 900 MHz band. Don’t modify the radio unless it’s time to get real;
Source: http://survivalblog.com/covert-communications-by-j-k/
