cm_kruger Posted January 31, 2016 Report Share Posted January 31, 2016 Interesting article about how the US and UK broke encryption on video downlinks from Israeli drones. https://theintercept.com/2016/01/28/israeli-drone-feeds-hacked-by-british-and-american-intelligence/ Quote Link to comment Share on other sites More sharing options...
cm_kruger Posted January 31, 2016 Author Report Share Posted January 31, 2016 Amateur Radio Operation in the Soviet Union circa 1965 A general overview of amateur radio licensing and activities in the period. And of course, there were cranks back then too: Quote Link to comment Share on other sites More sharing options...
Tied Posted February 1, 2016 Report Share Posted February 1, 2016 i thought you said not to post radio's Quote Link to comment Share on other sites More sharing options...
cm_kruger Posted February 1, 2016 Author Report Share Posted February 1, 2016 i thought you said not to post radio's Priory_of_Sion 1 Quote Link to comment Share on other sites More sharing options...
cm_kruger Posted February 4, 2016 Author Report Share Posted February 4, 2016 Quote Link to comment Share on other sites More sharing options...
cm_kruger Posted February 20, 2016 Author Report Share Posted February 20, 2016 E/A-18G with a HVT signals kill. Quote Link to comment Share on other sites More sharing options...
LostCosmonaut Posted February 20, 2016 Report Share Posted February 20, 2016 I always thought ELF transmitters were cool as hell. http://fas.org/nuke/guide/usa/c3i/fs_clam_lake_elf2003.pdfhttps://en.wikipedia.org/wiki/Project_Sanguine Project Sanguine was a U.S. Navy project, proposed in 1968 and only implemented in a more limited form, to create a hardened extremely low frequency (ELF) radio transmitter facility in Wisconsin to communicate with deeply submerged submarines.[1][2][3] The originally proposed system would have a giant "antenna" consisting of 6000 miles of buried cables in a rectangular grid covering 22,500 square miles, 40% of the state of Wisconsin,[1] powered by 100 underground power plants in concrete bunkers.[2][3] The cables were grounded at their ends, and loops of AC electric current flowed deep in the ground between the ends of the cable, generating ELF waves; this is called a ground dipole. The original design was projected to cost billions[4] and consume 800 megawatts of power.[1][5] The goal was a system that could transmit tactical orders one-way to U.S. nuclear submarines anywhere in the world, and survive a direct nuclear attack.[2] Belesarius 1 Quote Link to comment Share on other sites More sharing options...
cm_kruger Posted February 21, 2016 Author Report Share Posted February 21, 2016 It's neat stuff. Here's a site on the version of the system that the Russian/Indian navies use:http://www.vlf.it/zevs/zevs.htm With a transmitted signal as low as 82 Hz or 0.000082 MHz ( equals a wavelength of 3658536.5 meter or 3658.5 km ), we are talking real longwaves. There's a VLF Web-SDR somebody set up in Germany but I've never heard anything on it. And on that note, SDRs are really cool too. I originally got introduced to them via ADS-B ("radar" via receiving location beacons on aircraft, how sites like Flightradar work) and ACARS (basically text messaging for aircraft) related stuff, and similar systems for ships. http://websdr.org/ LostCosmonaut 1 Quote Link to comment Share on other sites More sharing options...
cm_kruger Posted February 24, 2016 Author Report Share Posted February 24, 2016 From the Signal Corps' more experimental period, a Morse code training film where somebody gets shot and there's a giant papier-mâché arm. Quote Link to comment Share on other sites More sharing options...
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