Category: Communications & Receivers

Moon Bounce Communications, by David in Israel

James When you were working at Defense Electronics I’ll bet you came across a few old articles and references to the pre-communication satellite days and how the military especially the navy handled this in a nuclear war scenario. While EMP can be handled by hardening and charge dumping circuits there is still the whole problem with a totally disrupted natural ionospheric layers. Under those conditions, it is predicted that long range HF radio just wont work on most bands most of the time. What started out as a way to listen to Soviet radio and radar transmissions was utilized by …


Four Letters Re: Coping With Inflation–Some Strategies for Investing, Bartering, Dickering, and Survival

Jim: Great article. You say you have a stock of spices you bought in the 1980s, and this saves you money. As someone who gets a lot of pleasure from good food, I would caution that most spices lose much of their flavor in a short time, certainly within a few years, especially for typical herbs and powdered spices stored in jars as bought in supermarkets. Yours may be specially packed or stored, or selected long-life types. But for most people, as advised in the “Rawles Gets You Ready” preparedness course, buying in moderate bulk makes more sense. A mail-order …


Letter Re: Communications in Times of Crisis

Hi Jim, In response to letter “Re: Communications in Times of Crisis”, I am a communications specialist and an electronic engineer with nearly 30 years in communications. Here are a few corrections to a very good post – some minor, some not: Typical UHF connectors will have approximately 0.5 dB loss, not 1.5dB (get rid of them if they do!). Many times it is preferable to buy your coax cable with installed connectors. There are a number of ham radio suppliers that will professionally install (and waterproof with sealant and heat shrink) good quality connectors to custom length cables. The …


Letter Re: Communications in Times of Crisis

James, Disclaimer: I am not a lawyer! Nor am I a communications specialist. Nor am I an electrical engineer. All of the values cited in the following letter are estimates, and anyone is invited to refute or embellish, or add corrected information to these meanderings. I am by no means an expert on the subject, but, I do have some background in amateur radio and have been involved in communications since I built my first “comm” system at the age of 14 for myself and my buddies, and throughout the years, including time spent in the US Army Signal Corps …


Letter Re: Centerfire Antennas December Sale Just for SurvivalBlog Readers

Hi Jim, I’m very impressed with the response to the ad I placed on your blog site [for Centerfire Antenna]. The SurvivalBlog customers have been some of the most polite folks we’ve ever dealt with. Looking through my web traffic statistics, most of those that have been referred through your blog have bookmarked our site. I’m giving SurvivalBlog readers a $5 per antenna discount during the month of December. They can use the PayPal buttons and $5 will be refunded to their PayPal account when their order is processed. Or they can choose to have the refund donated to SurvivalBlog. …


Letter Re: Preparedness for Less Than a Worst Case, From an Eastern Urbanite’s Perspective

Hello Jim, I am very new reader of your blog and am just now starting to go through the archives. Based on what I’ve read so far, I commend you on putting together a useful, fact-intensive blog on “survivalism” (whatever that means), that isn’t geared towards loony, off-the-reservation, tinfoil hat-type readers, who believe that 9/11 was a plot masterminded by Halliburton. That said, one problem I suspect I will have with your blog is that you consistently seem to be preparing for an extreme, and more-or-less permanent, breakdown of society—or TEOTWAWKI, if you will. In one of your blog posts, …


Letter Re: Security for Unattended Retreats

Technology has so advanced that we are now on the threshold of a new era in security. Off-the-shelf wireless burglar alarms are getting so sophisticated that you no longer need the services of a security company. If your retreat is in an area that has cell phone service, you can get a system that requires no hard line. Look for a GSM [Global System for Mobile Communications] Wireless Security System. GSM is the newer cell phone that uses a card. You don’t have to sign up for service at your retreat location and pay a monthly charge. Simply buy a …


Preparedness While on Business Travel–What to Pack, by LP

If you’re like me, there are times when you have to leave almost all your preparedness stuff behind as you journey by air to strange, far-off places on behalf of your employer. No access to your well-stocked SUV. You are alone, and home is hundreds if not thousands of miles away. But disaster will not be consulting your personal travel itinerary before it strikes. How best should you prepare? Let’s first discuss the objective, as it determines the approach. For most of us, we leave family, friends, and a (more-or-less) well-stocked homestead behind. This means Your primary objective is to …


Letter Re: Some Steel Canning Possibilities

Mr. Rawles, Given the recent discussion about canning, it seems like sealed tin cans would make an effective Electromagnetic Pulse (EMP) barrier. Why not can some inexpensive FRS radios, small transistor radios, and other electronic items in a standard soup-size can? Can some lithium batteries, and you’ll be all set. By the way, it would probably be a good idea to make sure that the lid and can have good electrical contact. Some cans might be lacquered/coated, so it might be wise to check the lid/can continuity with an Ohm meter. Regards, – JN-EMT JWR Replies: That is a great …


Perspective on the EMP Threat: Looking Back at Starfish Prime, by David in Israel

James, Since there seems to be big interest in the nuclear electromagnetic pulse (EMP) effect, SurvivalBlog readers might want to see some footage about the Starfish Prime test, [a part of Operation Dominic, a series of tests intended to test nuclear weapons effects in space], which knocked out some power substations on Oahu, Hawaii, around 800 miles away back in 1962. Video clip 1. Video clip 2. – David in Israel


Letter Re: Phone Line Power for Emergencies

Mr. Rawles, I found this web page interesting: Free Hidden Electricity. Essentially this site has provided some basic information on how to tap the small amount of electricity available in our land lines to use for charging batteries or powering a lamp should the power go out (and not the phones) in a small emergency scenario. Within the discussions that follow the post are some legal and contractual concerns and a link to a retail lamp product you can currently purchase for this application. – Tanker JWR Replies: There are some ethical issues raised by this Instructable video, since telephone …


Two Letters Re: Betavoltaic Batteries

Jim, Here is an article describing the challenges associated with betavoltaic batteries. The recent buzz over the 30 year battery, while intriguing, is overly optimistic. As stated in the article I linked to, betavoltaics currently have low efficiency, require heavy shielding, and the energy absorption media tends to degrade due to the high energy bombardment. I think it would be great if they could overcome these issues, but it looks like it may be 30 years before we see anything like a 30 year battery. – Mark D. in Utah Mr Rawles, Firstly I would like to say that after …


Letter Re: Digitized Data for Your Bug-Out Bag

Jim, First, thank you for the work you have done. Your blog site will surely save many lives. Also, thank you for your books. I’ve just started on “Patriots” and am thoroughly enjoying it. I’m very new to ‘long-term’ survival and much of the political and economic machinations that are going on that potentially may lead to SHTF. Living in hurricane country (Florida) I’ve always been better prepared than the average family and I’ve maintained my preps year round due to fears of terrorist attacks and bird flu pandemics. However, I’m completely shocked, horrified actually, about what I’ve learned over …


Two Letters Re: Lantern Battery Disassembly

Jim: On Saturday 22 September 2007, you posted a web link from T.A. in Indiana for a video on how to take apart a lantern battery and get 32 AA batteries out of it. I tried that with a heavy duty Ray-O-Vac and it had four cells approximately the diameter of C cell batteries but longer. Before people stock up on 6-volt lantern batteries thinking they will break down for AA batteries, they need to disassemble the brand they intend to buy to see how it is put together. The battery in the video appeared to be a bargain brand …


Two Letters Re: New Scanner Technology — An Emerging Threat to COMSEC

James: Regarding the “signal stalker” technology: This type of thing has been available for years in the form of frequency counters. Perhaps the best known in the ham/scanner community is the Opto Electronics Scout series. These units let you scan for radio transmissions and will store the last detected frequencies in memory for later recall. This is a handy feature if you are visiting a race track, for instance and want to find out the frequencies in use while you tour the pit area. They also sell a cable that will interface to various scanners, allowing you to immediately tune …