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Bricona wrote:What would it take to bring communication down to just radio
mattltm wrote:...Also worth pointing out is that most people who have radios at home run them from PSU's as I found out recently...
Maast wrote:And leave just radios? Not an (H)EMP, that'll cook most things with a chip and a few things with very small traces on the circuit boards, including radios.
The E1 component of a HEMP is a multiband radio pulse primarily in the 10 to 100mhz range (page 141 EMP comission report), the E3 component resembles a CME event....essentially a square wave event.
ke4yqd wrote:2) The effective radiated power decreases on the square of the initial radiated blast in distance. A ham and a radar guy alike, should know this. That's why at 7ghz you need A LOT of power to reach out 100nm to illuminate a target. So at 100MHz (easy because it's 3m long) and 100 watts; at 9m you will have 10 watts effective radiated power. At 15m (5x the distance) you will effectively have 1.2 watts on a from a 100 watt transmitter. This backs up what I said before about the attenuation of the wave being SUBSTANTIAL, agrees with physics, and agrees with your numbers Maast. I used simple numbers so anyone with a calculator can follow along. On the 10MHZ side it's the same numbers only with 10x the distance. Which is where long runs in any multiple of the harmonic of the wave can amplify the received wave, causing an increase of the received power. Like I said.
OttawaXJ wrote:I read this entire thread and now am left with more questions than answers.
I'm trying to figure out if CBs will still work after large solar flares big enough to cut out power or create mass hysteria.
At this point I'm thinking a solar flare taking out communications is far more likely than a war on or anywhere near Canadian soil so Im trying to figure out how to protect my and others CBs from such an event.
I saw all kinds of numbers and crazy math thats far above my level of understanding but couldn't understand any of it to be honest.
Edit: From rereading it would seem that an aluminum case would shield a CB radio, what about batteries and such? My vehicles would most likely be completely fried too right? So how would we power our CB if it still worked and everything outside of the small aluminum case fried. Or am I not understanding.
Bricona wrote:Hey I'm just wondering, there's a lot of ways people can communicate over the internet and over the phone, so what would it take so that humanity could only communicate via radio?
What places or satellites would people have to destroy? How would radio communication being the primary be possible?
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