Category: Communications & Receivers

Getting Prepared for EMP or a Solar Storm, by David in Israel

Electromagnetic Pulse (EMP) of the regional effect scale is a threat during times of potential crisis with a megaton class nuclear equipped foe who also has near-space launch capability for these weapons. An EMP-like event of greater strength and duration is also possible during extreme solar flare events. These types of event are caused by ionospheric excitation of the upper atmosphere by subatomic particles and plasma ejected from a massive solar discharge, this motion in the conductive plasma generates massive amounts of radio waves. An antenna is any conductor of electricity which inductively converts radio waves into voltage, usually grabbing …


Letter Re: Older Technology Radio Receivers

James, I was glad that a reader mentioned the Hallicrafters S-38 series of radios. I had forgotten to mention that the All American Five (AA5) type of radio was also sold in a multi-iband version by Hallicrafters. These are still often available for under $100 in working condition. I have a Hallicrafters model 5R10A, which is a lot like a [Hallicrafters] S-38D. It’s an AC/DC design like the AA5 radio that can be run on nine or ten car batteries wired in series with no inverter. (In a test, I found that nine fully-charged “12-volt” batteries wired in series provide …


Letter Re: Older Technology Radio Receivers

James Wesley, A Zenith Trans-Oceanic (T-O) is hard to beat, especially if you could snag a [rare] R-520 militarized version. This has a spare tube rack, uses no wax paper capacitors, is fungi proof, et cetera. The T-O definitely the world’s greatest portable radio (this side of the AN/GRR-6!) the G & H 500s and the 600 series as well as the R-520 all used the 1L6 converter tube which has become expensive and just about un-obtainable. You can clip a pin out of a 1R5 as a substitute but shortwave performance usually conks out around 7-8 MC. The earlier …


Two Letters Re: Older Technology Radio Receivers (Original Thread Title Was: Crystal Radios)

Mr. Rawles; I have been monitoring the latest posts on vintage radios–pro and con–and decided to offer more information and a possible solution for SurvivalBlog readers considering vintage electronics. M.E. is spot on in his post about the relatively anemic performance of crystal radios versus superheterodyne (as all “American Fiver” sets are known) tube radios. The biggest issue with crystal sets is their absolute lack of range. During a severe crisis, local radio stations will most likely be forced to regurgitate propaganda resulting in little, if any, useful information. As is generally known, news from afar (Canada, Australia, Europe, etc) …


Two Letters Re: Crystal Radios

JWR, While the concept and idea of a Crystal Radio for TEOTWAWKI (no battery or external power) sounds ideal, in practice the execution leaves much to be desired. Many ignore the fact that if a grid down situation occurs (or worse an EMP attack) that most radio stations in the affected area will be down and out for the count. In a best case scenario if the transmitting station’s components aren’t damaged, how long will their source of backup power stay up? Many modern stations rely on satellite feeds or long line telephone circuits for their program materials to be …


Letter Re: Amateur Radio for the Rest of Us

Mr. Rawles, Thank you for including the recent article on amateur radio in SurvivalBlog. I have been an amateur radio operator for about 35 years and have been playing with radios for over 40 years. I am amazed with the depth of knowledge of the readers on your blog. In many of the topics covered, I know very little. I have one criticism of amateur radio operators concerning “emcon” or emergency communications. Many hams like to participate in the organized drills with their local Emergency Government officials. This is a big mistake in a SHTF scenario. Think of yourselves, your …


Letter Re: Crystal Radios

Jim, Something I’ve often wondered about prepping, but have never seen addressed is the use of Crystal Radio sets for after TEOTWAWKI. Small, portable, and they don’t require any electric source. There are some high performance sets out there that get not only AM [broadcast band 560-1700 KHz], but also shortwave. I’d love to have some input from a knowledgeable individual as to the “best” unit from a prepping standpoint. The variety and cost spans the spectrum from under $10 at Radio Shack, to antique reproductions for over $500. Confusing to a novice, to say the least. But the technology …


Amateur Radio for the Rest of Us, by Jim in Illinois

In the modern world, there are few things as critical as the propagation of information. Anytime, day or night, we have access to news, weather, and interpersonal communications. When that information is unavailable whether due to a misplaced cell phone, internet disruption, or other factor, we begin to panic, feeling cut off and isolated. When disaster strikes, up to date information could be as vital to your survival as food, shelter, or a means to defend yourself. We can all make plans for our retreat and relocation, but without a means of contacting one another when the time comes, all …


Letter Re: Some Travel and Bug Out Gear Recommendations

Sir, First, as promised earlier I wanted to follow up and describe the kit I take with me on my trips. As I have mentioned in the past my job takes me overseas all the time, so for the past decade I have spent 80-90% of my time in third and second world countries. As a result the type of kit I take with me becomes important – it has to be packable and lightweight (especially now that the airlines are limiting you to 50 lbs. per bag versus the old 75 lbs. per bag). I have built up a …


You’re Not (Yet) Prepared, by Ted B.

You saw the warning signs years ago and decided to be the ant, not the grasshopper. You found and purchased the home on land that is now your residence as well as your retreat.  You’ve gathered the materials to survive, perhaps even thrive, during the coming storms of political upheaval, food shortages, social disorder and economic distress.  You took courses on weapons use and feel confident in your ability to defend home and kin with any of the weapons in your personal armory.  You assembled canning materials and learned how to use them.  You consume, replenish and rotate those foods …


What Divides You from The Sheeple? Plenty!

Nearly every week, I get at least one frantic e-mail from a new SurvivalBlog reader, stating that they feel woefully under-prepared. The gist of these e-mails is: “I’m behind the power curve! How can I possibly get prepared in time?” Fear not! Just by reading SurvivalBlog and taking some small, gradual steps at preparedness, you are miles ahead of your sheeple neighbors. And even with just modest preparedness measures, you have already substantially increased your chances of surviving most scenarios. As I see it, here are your advantages: Awareness Most people are clueless. They have a naive Pollyanna outlook. But …


Preparedness Beginnings, by “Two Dogs”

I am a retired Marine Corps officer and Naval Aviator (jets and helicopters), commercial airplane and helicopter pilot, and most recently, an aircraft operations manager for a Federal agency. I graduated from numerous military schools, including the U.S. Army Airborne (“jump”) School, U.S. Navy Divers School, Army helicopter, and Navy advanced jet schools. In addition, I have attended military “survival” courses whose primary focus was generally short-term survival off the land, escape from capture, and recovery from remote areas.  Like most Marine officers, I attended The Basic School, an 8-month school (only five during the Vietnam era – my case), …


Gear Up — Appropriate and Redundant Technologies for Prepared Families

I frequently stress the importance of well-balanced preparedness in my writings. All too often, I’ve seen people that go to extremes, to the point that these extremes actually detract from the ability to survive a disaster situation. These range from the “all the gear that I’ll need to survive is in my backpack” mentality to the “a truckload of this or that” fixation. But genuine preparedness lies in comprehensive planning, strict budgeting, and moderation. Blowing your entire preparedness budget on just one category of gear is detrimental to your overall preparedness. Another common mistake that I see among my consulting …


Three Letters Re: The Simple Reality of EMP — Different Than You Might Expect

Dear JWR, I read the EMP article by Andru and thought it very well done with one minor correction in the power generation area (worked in the nuclear power industry for 20 years before changing careers). The EMP E3 pulse is very dangerous to the transformers in the transmission and distribution system, and hydro-electric and nuclear will also be severely affected. Commercial generators of any output run at 8,000-10,000 volts which is fed immediately to step up transformers to feed the transmission system. The most common voltage for the transmission system is 250,000 to 500,000 volts (3 phase) which reduces …


The Simple Reality of EMP — Different Than You Might Expect, by Andru

One topic I have paid close attention to for the past 10 years has been our nation’s risk to Electromagnetic Pulse (EMP).  There are a few points I would like to make that are often overlooked—mostly dealing with the magnitude of the threat.  I don’t claim to be an expert on the subject, but I have consumed as much information as possible that doesn’t delve into the high-level physics—the kind of knowledge required to truly be an expert.  What may set me apart the most is the simple fact that I actually read the 181 page Critical National Infrastructures (CNI) …