This is just one of many interesting electronic devices I have come across over the decades. What is it? Is it a cause for concern? Here is another one:
Chances are, especially if you are a communications newbie, you don't even know what you don't know when it comes to stuff like that. How would you learn how to answer those questions on your own? How can you figure out what you don't know?
That's where Signal-3 comes in, and you can find out the answers in an upcoming issue. Signal-3 is an electronic technical newsletter focusing on resilient "down-grid" communications and other technological aspects of self-reliance and preparedness. It is delivered via an email link in PDF format.
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Don't let ignorance be your downfall.