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Preppers' Corner
Baofeng UV-5R, Ham Radio, What can I listen in on in OKC?
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<blockquote data-quote="Fr Mulcahy" data-source="post: 4255881" data-attributes="member: 42567"><p><a href="https://en.m.wikipedia.org/wiki/Radio_spectrum" target="_blank">https://en.m.wikipedia.org/wiki/Radio_spectrum</a></p><p></p><p><a href="https://en.m.wikipedia.org/wiki/Band-pass_filter" target="_blank">https://en.m.wikipedia.org/wiki/Band-pass_filter</a></p><p></p><p>Think of a radio transmitter as a firearm, and its signal as the ammunition.</p><p>Let's pretend that you and I are at the range, shooting next to each other.</p><p>We normally want nice, tight groups on our targets, so we're shooting 22LR rifles with the targets set at 50 yards. I hit my target, you hit your target, and everyone's happy.</p><p></p><p>But now comes a guy next to us, and he is trying to do the same thing as us. The problem is that he's using a 12 gauge shotgun with buckshot and a cylinder choke. He hits his target (maybe), but he hits my target and your target too. Now everyone's unhappy because no one likes a crossfire. </p><p></p><p>Baofengs are like shotguns in that they transmit on a wide range of frequencies at the same time. It's illegal, it's annoying, and it can be dangerous (what if I transmit over EMSA's frequencies, for instance--I could scramble their signal).</p><p>The FCC was created to make sure that interference doesn't happen, and there are rules that people follow to keep it from happening. </p><p></p><p>Ham radio operators have to pass a test (or two or three depending upon what frequencies they want to transmit on), and it is drilled into them that spurious emissions (interference) must be avoided. They also learn basic radio safety rules (to keep themselves from getting electrocuted), electric and electronic circuits, electromagnetic wave propagation theory, and a lot of other things that I think are cool.</p><p></p><p>It's not hard to pass the first test (Technician). If you want to learn more about the process, check out <a href="http://www.arrl.org" target="_blank">www.arrl.org</a>.</p></blockquote><p></p>
[QUOTE="Fr Mulcahy, post: 4255881, member: 42567"] [URL]https://en.m.wikipedia.org/wiki/Radio_spectrum[/URL] [URL]https://en.m.wikipedia.org/wiki/Band-pass_filter[/URL] Think of a radio transmitter as a firearm, and its signal as the ammunition. Let's pretend that you and I are at the range, shooting next to each other. We normally want nice, tight groups on our targets, so we're shooting 22LR rifles with the targets set at 50 yards. I hit my target, you hit your target, and everyone's happy. But now comes a guy next to us, and he is trying to do the same thing as us. The problem is that he's using a 12 gauge shotgun with buckshot and a cylinder choke. He hits his target (maybe), but he hits my target and your target too. Now everyone's unhappy because no one likes a crossfire. Baofengs are like shotguns in that they transmit on a wide range of frequencies at the same time. It's illegal, it's annoying, and it can be dangerous (what if I transmit over EMSA's frequencies, for instance--I could scramble their signal). The FCC was created to make sure that interference doesn't happen, and there are rules that people follow to keep it from happening. Ham radio operators have to pass a test (or two or three depending upon what frequencies they want to transmit on), and it is drilled into them that spurious emissions (interference) must be avoided. They also learn basic radio safety rules (to keep themselves from getting electrocuted), electric and electronic circuits, electromagnetic wave propagation theory, and a lot of other things that I think are cool. It's not hard to pass the first test (Technician). If you want to learn more about the process, check out [URL="http://www.arrl.org"]www.arrl.org[/URL]. [/QUOTE]
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