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Message: <blockquote data-quote="SMS" data-source="post: 2439061" data-attributes="member: 42">I was a commo and electronic warfare guy for my entire 22 years in the USAF...but most of my experience was with long haul, high bandwidth/power stuff...or localized active/passive jamming systems.  I can throw my 2 cents in, but would deferr to someone who specialized in man portable, long/short range personal comm systems.I'll say that if we are talking about B.O.B systems, then that really limits the scope of systems worth discussing.  Commo is a big scary world just like prepping.  But just like prepping, you can/should figure out your basic needs first and build in small chunks.  I truly think, in the context of a B.O.B and depending on the size of the group, most folks could get buy with a FRS system...I don't think you'll be too excited to throw a HAM system into your rucksack LOL.The larger converation/learning could occur in the realm of understanding of RF propagation, modulation principles, bandwidth requirements (and the corresponding effects on transmitter power requirements), antenna types etc...</blockquote>