Tag Archives: prepardness

SHTF School Blog Entry

by Woodsbum

Although I spend a lot of time reading about woodsman related subjects, I do include a lot of the SHTF and prepper sources. Some of these sources actually touch upon more than just the “survival” aspect of woodsmanship. Many really push old school skills and natural remedies. The amount of knowledge that these corporate “survivalists” push out there is truly amazing and can be adapted to many different situations.

This article that I ran across really struck me as more than just a doomsday rant. It showed the parallels between the USA and what took place in the Balkans. For those of you who do not do much research beyond new restaurants and what new shows are coming on the TV, this might be a surprise. The Balkans had a very nasty war take place back in the 1990’s. I actually know a few people that lived through this horror and 1 that was lucky enough to get out right before it got bad. This guy Selco, from SHTF School, actually lived through the nastiness and became a “survival expert” due to his experiences. The blog/site is worth a read just to let you know how bad things can get when the infrastructure breaks.

In this article, Selco talks about how the polarization of once unified people really was one of the many indicators of the upcoming violence. He draws some pretty interesting lines between what took place there and what is taking place here in the States. No matter what political leanings you have, this article is really worth a look.

Selco also talks about how the removal of what are commonly considered a right that cannot be taken away, can and will be removed from the general population. Here in the USA we believe that the rights in the Bill of Rights are set in stone. Selco says that the same type rights that they thought were set in stone were taken away by the government in a single day. Since the US has been living a certain lifestyle for so long, he believes that any fall in the US will be very devastating. His perspective is quite the departure from what the US media is pushing down our throats.

It doesn’t matter if you are a prepper, conspiracty theorist, lifelong liberal Democrat or anarchist. Your “label” doesn’t really matter. It would behove you to take the time to read this article just so you can see how an entire nation’s world changed almost overnight and their media sources were covering it up.

Sound familiar?

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Google Recording and Tracking

by Woodsbum

I found a post on SHTF School today about Google history and tracking. References to this are all over the Internet, but I had yet to actually find the settings until today. Once I pulled up my history page I was almost sick to my stomach. Every voice search I had performed for the last couple years was there. I could literally click  the audio file and hear my voice. The scarier one is the location search. There was several years of data stored up to include my trips back East for business and my daughter’s graduation. The even scarier thing is that it actually shows the exact route I took through the Everglades, all around the Carolinas, trips locally, and even the layovers on the flights I have taken.

Here is the link to see what Big Brother is tracking, that they let you know about.

After some searching around, I figured out how to delete my history and all the audio recordings. I have yet to figure out how to delete my location history. This really scares me because I don’t trust anything. It would be real easy to look at my location history and see that I like gun stores, being outside, and where I go. Since I am so paranoid, although I would never do anything that would jeopardize my gun rights, hunting rights or freedom, I would hate to somehow get profiled by Big Brother just because I want to be left the hell alone. Getting lumped into some “bad guy” group just for doing LEGAL activities that some libtard back East doesn’t like does scare me a lot.

Deleting the other stuff was pretty easy. The options are at the top of the page and you just choose “Settings” to get to the delete option. Maps and location are a bit trickier. Here are the instructions from Google:


View or delete your Google Maps history

Your Maps history shows you places that you:

  • Reviewed
  • Saved
  • Shared
  • Were asked to review
  • Answered a question about
  • Searched for recently

Your Maps history will only be saved if you’ve turned on Web & App Activity.

View your Maps history

To see your Maps history, follow the steps below.

  1. Sign in and open Google Maps.
  2. Click the Menu > History.

Delete Maps history

You can delete places from your Maps history one at a time. To delete all of your Maps history, you’ll have to use your computer.

To delete a place from your Maps history, follow the steps below.

  1. Sign in and open Google Maps.
  2. Click the Menu  > History.
  3. Check the box next to the item you want to delete.
  4. Click Delete.
  5. Optional: To delete a day, check the box next to the day > Delete.
  6. Optional: To delete all of your history, go to the top and click More three vertical dots > Delete options > AdvancedAll time > Delete.

Note: Deleting all of your search history from Maps doesn’t include places you’ve saved, shared, or were asked to review.


Whether you are as paranoid as I am or just want to keep nosey people out of your business, this is a good thing for you to look at. I noticed that places that I had never actually gone into showed up as “locations” that I had been on the map. For instance: I don’t go to Burger King, but there sure were a lot of them listed on my map. It makes me wonder if just driving by something will get it to trigger and save the location. You could get yourself into trouble in a place where there are more strip clubs than churches just by driving on the wrong road.

Good luck with this everyone!

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Sheriff Says to Fight Back

by Woodsbum

For those that don’t watch the news, there have been some really nasty things going on as of late. Terrorist islamic asshats have been killing people on American soil more and more now. There was a piece of shit that walked into a bar frequented by homosexuals and opened fire. He killed 49 and wounded 53. Now our own government is playing down the islamic connection between this jackass during his 911 call where he claimed responsibility.

Can you believe we are now living in a country where the Department of Justice and the White House downplay terrorist actions to make it easier to shift blame?

Here is an interesting video from a Sheriff where he basically tells people that it is time to start fighting back instead of constantly being victims.

I try really hard to be as unbiased as possible when I post things, unlike the media and White House. We are getting to the point in our country’s history where the tipping point between government control is going to overthrow citizen’s rights. There has got to be an end to this progressive, oppressive agenda. I just want to be left alone to spend time with my family, do things outdoors and live my life in a quiet and LEFT THE HELL ALONE manner.

Hopefully, something will shift the power away from these greedy bastards in office and allow Americans to no longer be slaves to politicians’ personal agendas.

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EMP and HAM Radios

by Woodsbum

This forum post was sent to me the other day. It covers the science behind EMP and Ham radios. The way that it is presented and all the science behind it are actually quite well presented.

This link is from a post on AR15.com.


So a whole lot of wailing and gnashing of teeth has occurred lately over in prepper land about EMP. I attribute this mainly due to survivalist authors looking for some easy national/global catastrophe scenario to hook into without really having much if any understanding of it. I won’t criticize specific books as some are more accurate than others, but the net result is there is a TON of disinformation out there on EMP IMO.

I am not an expert, but I am literate and do have a few letters after my name and I am an amateur radio operator with a basic understanding of physics and electronics. There are likely people on this very forum that know a shitload more about this than I do, but since no one has stepped forward to do this I’ll take a stab at it, and if those knowledgeable individuals want to correct anything I post along the way please do so. My main source of information is the following document prepared at ORNL which I will reference, since they are the experts, not me.

Big long detailed report by actual experts

So to start with:

We are talking about a very specific phenomenon known as E1 HEMP which is generated in the first few nano-seconds of a nuclear blast. This will generate a large electromagnetic field over a wide frequency range, but the worst from about 1mhz or less to about 1ghz where it really starts to drop off (Page 2-7). It is also very similar to a what happens during a lightning strike (which is actually more powerful) so a lot of measures that help with lightning strikes can also help with E1 HEMP.

One thing to clear up E1 HEMP is mostly yield independent. You don’t need a huge nuclear device to generate it, the examples in the book are 500kt (2-11).

What determines the coverage of an EMP is its height above ground, obviously the higher it is the more it affects. However the higher it is the weaker it is. The “optimal” height above ground is typically less than 100km, in their example 75km is optimal. Total coverage at that height is about 800-1000km (2-14). So it’s a fairly large are, but not the whole US by any stretch of the imagination. Also, what isn’t covered by any of the models used in the study are local terrain effects, like shadowing or reflection. These will be important locally however. So if you are in a valley and “can’t” see the nuke at 75km high, you will have some protection.

The next thing to get an idea of is how “strong” the E1 HEMP is. As with any sort of electromagnetic phenomenon it follows the inverse square law. So that means it gets weaker the further you are away from it very quickly. For comparison they use an EM field generated by a FM radio station for comparison. At 1 mile from 10KW transmitter, the peak field is .68V/m, a peak field at ground zero (directly below the nuke) will be 50,000 kV/m (its a lot), however since this falls off very rapidly with distance, average exposure will be 6.21 Kv/m (still a lot, but its not 50,000 Kv). The example states that a 10cm conductor at ground zero (50,000kV) will have an induced current of 5kV. So using the 6.21 kV average field that same conductor will have an induced charge of 621 Volts (2-35).
You can see this effect on their charts 2-29. If you have the nuke over Omaha, it F’s up Omaha, but the effects near Chicago, Denver, or Dallas are fairly minimal only .5% of the energy in the 10-100mhz range makes it out that far.

I mentioned frequencies earlier and that is both significant and important. The highest energy range is 1-10mhz. So as HAMS you should understand that means it covers the 160-30m bands the most and then drops off as it approaches UHF frequencies. It’s the wavelength that’s the concern. So most of the energy in the E1 HEMP will want to couple to things of a similar wavelength just like a radio antenna. So its typically things like cabling attached to devices (antennas, power cables etc.) that is the major concern (2-35) So unplugging your radio from the antenna is a very good idea if you are worried about this (2-38). If the device is powered chances of damage are higher (2-36), there are also other post nuclear blast effects, TREE effects (radiation) that can also damage electronics but these aren’t E1 HEMP.
When it comes to shielding against EMP, there are a lot of things discussed, but how E1 HEMP couples to things is very important and more importantly difficult to predict (2-37).

So things that EMP will couple very well to are going to be metallic things that are 30 meters long (10mhz) and longer. So power lines, telephone lines, railroad tracks and the like. Most of the report is focused on what exactly is going to happen to the electrical grid and telecommunications, because that’s where the largest vulnerability is (2-45). And ironically enough high voltage power lines aren’t actually super problematic since they are designed to withstand lightning strikes, and EMP coupling doesn’t really scale past 1km or so.

Peak current on a power line.

Peak currents on a 5M long vertical antenna (below)

EMP and HAMs
What about the stuff you as HAM care about, a radio for example… First of all many devices, and especially radios are shielded against EMI already (2-44), which isn’t exactly the same as E1 HEMP, but it can help, there are often RF shielded modules in most radios. As I mentioned earlier, the best thing to do is not have the radio connected to the antenna when not in use, and I would argue have the antenna feedline grounded. In fact there is a huge amount of similarity between E1 HEMP and lightning strikes, so all that stuff the AARL tells you to do when constructing a shack is pretty useful when it comes to E1 HEMP.
There is a lot written about faraday cages Wiki, but I think this must be placed in the context of the frequency range you are talking about (look, they have big ass holes sometimes). The principle of waveguide cutoffs is a good one to consider (2-42), your faraday cage, and lets use the example of a metal trashcan, is probably a good and cheap EMP defense, first off its much smaller than 30m, so that big pulse isn’t going to couple to it too well, but some of the energy will be at the 1m wavelength, but that’s pretty far down the slope of the energy curve so there will be some coupling. Well what about holes or small gaps in the trashcan, yes it helps not to have them, but looking at the frequencies that will get through a 1mm gap is a 300GHZ, well above the energy generated by E1 HEMP which mostly drops to zero by 1GHZ or 300mm or about 11 inches. Also the trashcan is made of relatively (thick) metal which it needs to not be permeable i.e. skin depth (2-40) and why I would seriously doubt that ESD bags marketed for the purpose would actually be effective (no skin depth).

Finally there is a “myths” section in the very last appendix that will likely be helpful.
Cars dying: small fraction is possible (turns out your car will act as faraday cage if its made of metal) and cars are EMI shielded
Wristwatch dying: Too small to be affected by E1 HEMP.
Electronic devices that are turned off will likely fare better (true)
Conductors. Shorter is better since it will couple less with the EMP.

So, is EMP a viable existential threat? And the answer I think, is that its really hard to say. I think the idea of a 1 bomb EMP taking out the US is pretty non-sensical. However a 1 bomb scenario could still do significant damage to localized areas i.e. a large metro area, or for example the northeast united states. And as is mentioned in the report, EMP is largely yield independent, so even a fairly reasonable 500kt weapon could do a lot of damage. A bomb detonated above say NYC would likely take out Boston, NJ, DC etc. and the associated infrastructure. That being said, a coordinated strike involving several warheads detonated roughly around the same time could in fact take out most of the US power grid. As mentioned in the report the primary vulnerability is the power grid and telecom systems, since of course antennas will be connected to radios when the bombs go off. Smaller electronic devices are primarily vulnerable if they are plugged in at the time since the power cords can couple to the EMP and produce high voltage. Protection against EMP is a faraday cage, and probably the cheapest and best option IMO would be the famous metal trashcan example. Alternately if you need something smaller an Ammo Can would probably work just as well.


This guy really does do a great job explaining how EMPs will affect electronics and HAM radios. It actually makes me do some thinking about how I should plan for possible EMPs for such equipment as my motorcycles and my truck. Since EMPs are not just isolated to high altitude nuke blasts, preparing for such phenomenon is probably not the worst idea. Considering how bad my luck is I should be planning for a lightening strike that melts the ECM in my old Dodge. I could probably get enough parts from the junk yard to cover me for less than $200.

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