Category: Communications & Receivers

Editor’s Introductory Note:  The following primer introduces mesh networking.  As a survivalist, I see the biggest limitations of present-day mesh networks are that: A.) Most are urban, and B.) Most are dependent on  the continuity of grid power.  But one implementation of mesh networking that overcomes both of those limitations is sold under the trade name GoTenna. A competing brand is called Radacat. Either of these will enable your existing Android or iOS phones to become Mesh devices that will continue to work in text mode even if the power grid and cellular networks go down. They both also have …

Recently I purchased a good two-way HT (slang for a hand-held Ham radio), and I thought I would share my thinking process behind picking it. General Points Here are a few general points. (Later I will get into the specific details.) Conditions and Reasons May Differ First off, I want to say that these are the conditions and reasons I used to make my choice. Yours may be different. I have a Ham radio license. This means I can operate within a wider frequency range than those frequencies covered by an off-the-shelf radio (FRS/GMRS). If you just don’t want to …

So far, you’ve learned about the FCC and non-FCC license communications devices and equipment that is used with them. I touched on the use of Ham devices in an emergency, if you don’t yet have your Ham license. Now, let’s wrap up by learning how you can obtain your Ham license and move on to establishing and planning your communications. Getting Your License Ham radio licenses come in three levels, increasing in complexity of test and allowable frequencies. The FCC does not charge for the license, but your local Ham radio club usually has a $14 fee for giving the …

We’ve previously covered non-FCC license dependent communications devices and are wrapping up our examination of FCC license dependent communications options, with special consideration for their use in an emergency. Today, we’ll also begin looking at resources and accessories that help us improve communications. VHF/UHF Radios Almost all of the “base station” VHF/UHF radios are designed as car Ham radios. Because of this, they can be very flexible in usage. Most of these are 25-50 watts, and some are even stronger. With the limited range of VHF/UHF, I think that going over 50 watts is probably not needed. FM is the …

We just took a look at non-FCC License Dependent Communications, including use expectations and purchase considerations. Today, we begin examining FCC license dependent communications devices. FCC License Dependent Communications GMRS GMRS radios operate on the same frequencies as FRS along with a number of additional channels. They can use up to 50 watts, and the FCC allows for better antennas and repeaters. GMRS will require a license. No test is needed, and the FCC license covers all residents of a household. On last check, the license cost $85 dollars. Pros and cons, along with distance, are similar to FRS, with …

Today, we’re continuing to look at communications devices in this communications overview section of the article. So far, we’ve look at Ham radio/licensed devices, but now we’re moving into non-FCC license dependence communication devices to consider. Cell Phones – Using During An Emergency and Improving Reception During an emergency it is very common that the local cell phone towers become saturated. Many people attempt to connect at the same time, resulting in busy signals. In addition, some cell towers have special equipment that restrict public use and dedicate additional bandwidth to emergency services. This section covers how to get a …

Communications Overview and General Guidelines About This Article A modern two-way radio combines transmit and receive components together and is known as a transceiver. In this article I will use the terms radio and transceiver interchangeably. I’m also trying to write this to the largest audience possible and for that reason I may sacrifice technical accuracy in order to express the concept. Not all emergencies will require advanced communications equipment. Common usage technologies, such as email, voice mail, and SMS texting, should not be ignored. The more options you are able to take advantage of, the better your chances of …

We’re continuing to evaluate how to prevent a failure to communicate when we do not have wireless electronic communications available to us. We’ve been exploring our options. Yesterday, I wrote about the different types of communications and types of interference to communication. I wrapped up yesterday’s part of the article by introducing what you should do to prepare. The first part, of course, was plan. Let’s take a look at the second part and conclude the article with the subsequent steps to prepare. Document Once you’ve got a good handle on your requirements and solutions, you should create a couple …

We’re continuing to evaluate how to prevent a failure to communicate when we do not have wireless electronic communications available to us. We’ve been exploring our options. Yesterday, I wrote about various channels of communications. Today, we’ll move into various forms of communications to consider. Electronic In the beginning of this article, I mentioned that it was about alternatives to wireless electronic communications. However, that doesn’t rule out wired forms of electronic communication. Wired communications tend to be point-to-point, are very hard for anyone to intercept, and can send large amounts of information. The biggest disadvantages are that they require …