Category: Communications & Receivers

Letter Re: EMP Protection

Jim, I have been thinking about EMP damage to circuitry. Am I correct that it only damages computer-chip circuits, or does it also fry transistor type? It won’t harm old type ignition (with points) systems, right? If this is the case, a generator would become just as useless as anything, unless it is stored in a metal cabinet of some kind, right? How air-tight would it have to be to be effective in EMP suppression? (would it need to be totally welded, or just tacked good enough to keep it together? I am a welder, and am thinking about making …


VHF Marine Band and Out of Band (“Freeband”) CB Radio Modifications

Proviso: The following is for informational purposes only. Do not modify radios as described unless it is a dire emergency. (FCC regulations do not permit out of band transmissions except under emergency situations.) One aspect of preparedness that is often overlooked is secure radio communications. As I’ve mentioned in some of my previous blog posts, buying a pair of VHF Marine Band radios makes sense if you live in an area that is both inland from the coast and away from the Great Lakes. You will essentially have a band all to yourself. Another approach to increasing communications security is …