File:LetterBeacon-D-5153 7 kHz.png

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==Summary== '''Description:''' Screen capture of [[w:en:Letter beacons|Letter beacon]] "D" on 5153.7 kHz. Receiver tuned on 5137 kHz (USB).<BR> '''Source:''' Radio signal capture using Spectrum Laboratory V2.7, copied from Wikimedia Commons [http://commons.wikimedia.org/wiki/File:LetterBeacon-D-5153_7_kHz.png]<BR> '''Date:''' 2009-11-01<BR> '''Author:''' Screen capture: K. Krallis, SV1XV<BR>Spectrum Laboratory program: Wolfgang Buescher, DL4YHF<BR> ==Licensing== [http://en.wikipedia.org/wiki/en:GNU_General_Public_License GNU General Public License]<BR> [[Category:Images]] [[Category:Beacons]]

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