Preparedness

Is Ham Radio Useful?

Mr. Homegrown
Preparedness
8 Comments
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The BaoFeng UV-5RE.

Last year I got my general and technician amateur radio licences thanks to an easy to learn memory trick. But when it comes to actually using a radio I don’t have a clue. To learn more I joined my local club and took part this last Friday in a contest, using the club’s equipment, to talk to Hams worldwide. The contest involved the quick exchange of call signs. One moment I’d be talking to Japan the next Slovenia, the Azores, Brazil, Venezuela, Mexico, New Zealand–the list of countries went on and on.

I spent three hours in the club’s radio room, located in the emergency communications center at the offices of a local hospital. It was fun, but the utility of the exercise was not immediately apparent. The cell phone system is a lot more robust than it used to be and you don’t need a licence to use a phone in an emergency.

I got home from the contest around 9 pm and as I began to make dinner the windows started rattling and the house began to roll. It was an earthquake. The cats panicked and ran under the couch. Since Ham radio was on my mind I instinctively grabbed my handheld radio and immediately heard the voices of other Hams discussing the earthquake. It was then that I realized how useful amateur radio could be. Not only did I get instant information about the earthquake, but I also had access to a network of people who could help me and my neighbors in a real emergency.

The cats? Not so useful. It took about a half hour for them to emerge from their hiding spaces.

In an emergency it’s a good idea to have a radio and know how to use it. And you don’t have to be a Ham to listen to Ham frequencies. Thanks to cheap imported electronics you can now get a radio that receives and transmits on Ham bands, works as a scanner and even transmits on FRS (family radio service) frequencies–all for $40–the BaoFeng UV-5RE. The Survival Podcast did a whole episode on radios you should have in an emergency and the BaoFeng features prominently in the pantheon of zombie apocalypse communications equipment discussed on that show. I can’t speak from experience about the BaoFeng as I have a Yaesu FT-60. But, combined with a battery operated AM/FM radio, the BaoFeng would make a nice addition to your emergency supplies.

Now if only I could teach the cats to tap out Morse code.

A viewing suggestion from the media arm of Root Simple

Mrs. Homegrown
Domesticus, Food, Gardening, Preparedness, Resources, Thoughtstylings
34 Comments

I really enjoy learning about technologies that are basic enough that I feel like I can understand them–and maybe even replicate them. The technology of Tudor-era in England is by no means primitive, but it also is not as complex and machine-based as the tech which takes off in the 19th century and accelerates so quickly into the present era. I would be hard pressed to explain how anything around me works–from this machine I’m typing on to communicate with the outside world, to the electric light burning beside me.

Bless the BBC for making Tudor Monastery Farm (a title which I believe would not fly on American television). This is a quiet series showing three historians/archeologists at play in the Weald & Downland Open Air History Museum, trying out some of the skills they’d need to be tenant farmers to the local monastery. It has some of the structure of a reality show, but it seems that no one really wants to go that direction much, so with the exception of a bit of camera confession about the urgency of getting the peas planted before Easter, there is none of that annoying reality show faux drama. Instead, it’s just full of juicy nuggets for the appropriate tech geek.

The series is on YouTube. I pray the BBC doesn’t take it down before I get to finish it.

In the first episode alone, they cover goodies like:

  • Coppicing
  • How to make two type of fences: a hazel wattle fence and a dead hedge fence, both of which can be made with a machete and a club
  • Treadwheels: Giant human powered hamster wheels which, along with water wheels, were the engines of their time.
  • How to make rush lights out of sheep fat and rushes.
  • An almost forgotten food plant called Alexanders, which is a Mediterranean plant related to parsley, which I’ve never heard of but now want to plant in my garden.
  • Tips on calligraphy done with quills. Did you know the quill has to be almost horizontal in the hand?
  • And how to make a paintbrush out of a feather and a stick. Marvelously clever, and the secret to the fine lines in illuminated manuscripts.
  • How to make a magnifying glass out for working the detail in said illuminated manuscripts.
  • How a Tudor gentleman literally sewed himself into his clothes each day, & the mysteries and marvels of the codpiece. (I suppose that if I were transported to that era I’d eventually stop staring at the distracting cords dangling from gentlemen’s crotches. You’ll see what I mean.)
  • You get to meet one of the last working teams of oxen in England (sad!), and see what it takes to plow a field.
  • How to build and wattle and daub pig house
  • And finally, very exciting, there’s a cameo by Robin Wood, the last professional wooden dish carver in England. I’ve seen his videos (where he looks much less dorky than he does in Tudor gear) and actually have one of his bowls. He carves beautiful bowls and spoons, his only tools his hatchet, his carving knives, and a foot operated pole lathe. The foot operated lathe was in use for nearly 1000 years, but now is almost extinct. It’s a wonderful piece of technology. Robin makes it look simple, but I’m sure it takes mad skills to use.

And that’s just the first episode. Ale and cheese, blast furnaces and sheep shearing to follow!

One last take away: Because my undergraduate degree is in art history, one thing that really struck me was how much everyone in this show looked like characters out of a Bruegel painting. If you know Pieter Bruegel’s work, you might remember how all his people have this particular stocky, stuffed, oddly jointed, funny-footed sort of look. I thought this was an artistic affectation.  Turns out it’s just the way the clothes fit. Pieter, I did you wrong. You were just painting what you saw.

pieter bruegel's painting, The Peasant Wedding

Extreme Low-Tech Communication

Mr. Homegrown
Appropriate Technology, Preparedness, Water and Power
5 Comments

PowerSupply-large

This has to be the ultimate achievement in low-powered long-distance communication. Ham radio operator Michael Rainey, AA1TJ, transmitted a message over a distance of over 1,000 miles by yelling Morse code with his own voice into this primitive home-made transmitter, nicknamed “El Silbo.” No power was used other than that generated by his own voice vibrating the microphone (which was a re-purposed speaker).

If you want to build your own here’s the circuit schematic and more details.

And here’s Rainey, back in 2009, using El Silbo:

On a side note, can we please apply Ham radio’s level of detail and open source spirit to the world of backyard vegetable gardening?

Primitive Grain Storage Technique

Mrs. Homegrown
Appropriate Technology, Food Preservation, How-to, Preparedness
8 Comments

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When thinking about technology, I like to play with the idea of what is the absolute minimum you need to get the job done.  This may be because I’m not very handy at building things, but yet have survivalist tendencies. So while I’m pretty sure I’ll never actually have any need for these skills, it’s fun to think about how I’d get by in a DIY world.

So I was delighted when I ran across this minimalist grain storage technique on the BBC documentary series, A History of Celtic Britain (2011), hosted by Neil Oliver of the Delicious Scottish Accent. (I am watching it on YouTube. Fingers crossed the BBC will not take it down before I finish it!)  I love this technique because while it is simple, it is far from stupid.

The technique is described by the Dave Freeman of the Butser Ancient Farm in Hampshire, where they’ve been experimenting with grain storage iron-age style (c. 400 BCE.).  Turns out all you need to do is dig a pit in the soil. The pits they dug are circular, and look to be 2 or 3 feet in diameter, and maybe 3 or 4 feet deep.

So you may ask, how can you pour grain into a hole in the ground and expect it to keep? The secret is a clay cap on the top. In the screen grab below you can see the cap and some feet for scale:

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If you go to YouTube,  you can watch this sequence starting around 52:36, but what Freemen says is that when the grain goes in the pit and is sealed with a clay cap, the clay blocks out moisture, air and light. Moisture is still available at the sides and bottom of the pit, of course, especially as they are in green Hampshire.

The grain touching the sides of the pit sucks the moisture out of the soil at the edges, and uses it to attempt to germinate. The germination process sucks up oxygen and releases carbon dioxide, effectively clearing the chamber of oxygen. At that point, as Neil puts it, “Time stops.” Nothing can grow, nothing changes. The grain cache keeps for at least a year, perhaps two years, and provided a very handy safety backup for hard working iron age farmers. And some very basic appropriate tech for modern armchair survivalists to ponder.