The Phaserl


2-Way Radios For Pre & Post SHTF Local Communications

by Ken Jorgustin, Modern Survival Blog:

2-way radios (walkie-talkies) do not require a working infrastructure as do cell phones (antenna towers, network service providers, power-grid, a paid service plan). A set of 2-way radios ‘just works’. The only thing a 2-way radio needs is a charged battery.

2-way radios may have their limits on how far they will transmit and receive, however there are some that are perfect for local communications while serving a wide variety of purposes.

We have been using GMRS 2-way radios here at the homestead for awhile now, and they’ve been great (The General Mobile Radio Service)… Since it’s just Mrs.J and I, whenever either of us goes out somewhere on the property, we ALWAYS bring a 2-way radio. It’s not only convenient for normal comms, but you just ‘never know’ when an emergency situation may arise. I also always keep a set of handheld radios in the truck for ‘just in case’.

Here’s a bit more about GMRS radios, a decent ‘base station’ concept (and base antenna), handhelds, and why I like GMRS for local general purpose comms…

There are several choices when it comes to choosing the best type of 2-way radio for local communications. In short, there’s MURS, FRS, GMRS, and CB radio. I’m not going to get too technical about it, but to put it simply…each of these types of radios operate on different frequency bands and each have their pros and cons. I feel that GMRS is the best for ‘local’ communications, especially given that these radios can operate up to 5 watts power.

What do I mean by ‘local’? I’m talking about a range within just several miles or less. Again without getting into potentially boring technical reasons (although I find it interesting 😉 ), there are many factors which affect range. GMRS is ‘line of sight’ (from one radio to the other) although it will transmit through forest, buildings, some terrain, etc.. to an extent depending on density. I won’t go deeper into it than that, so just know that I’m talking about communications within a several miles (although you can go hilltop to hilltop up to 20 miles or thereabouts…).

Handheld and ‘Base Station’ GMRS radios
I have had handheld GMRS 2-way radios for years. They work well. With that said, a radio designed as a ‘base station’ may offer some attributes that potentially make it more powerful. Their electronics may be better designed (although not always). More importantly they can be paired up with a better antenna which enables the radio to reach out further than a handheld.

For example, the following GMRS radio although designed to mount in a vehicle, serves well as a base station for inside the house (use with an upgraded external antenna).

Midland MXT100 GMRS 2-Way Radio

The radio being designed for the vehicle will require a 12-volt DC power connection. Alternatively for inside the home you simply need a small 12 volt DC power supply. Example:

Pyramid PS4KX 3 Amp Power Supply

Note: I really like the simplicity of this radio. However (tech alert), it does not have ‘repeater’ capability (Duplex mode) (See the next note). But that’s okay with me since I’m only using this type of radio for local communications.

Note: Some GMRS radios include ‘repeater’ functionality that enables you to transmit further by way of repeater stations which ‘repeat’ your signal by first receiving your transmission and then re-transmitting it from the repeater location (typically located in high spots like tops of mountains, buildings or towers.). There’s more ‘technical’ description, but I’ll leave it at that.

GMRS Base Station Antennas
While a handheld GMRS radio typically has an attached short ‘rubber ducky’ antenna (a short whip), an antenna can be a factor that can increase your range.

A ‘base station’ type radio will enable you to choose your own external antenna which may have characteristics that increase your range. Additionally by increasing the height of your antenna (mounting it up high), you can improve the distance your signal radiates.

There are a number of GMRS base station antennas which are designed for this specific frequency range. One popular and relatively low cost GMRS antenna with 6.5 db gain is the…

Tram 1486 UHF Land Mobile Base Antenna

Additional considerations will be procuring the coax cable between the radio and the antenna, mounting it (e.g. to the house via a pole and mounting brackets), making a feed-through from the inside to the outside of the house, fine tuning the antenna,…

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