| The 143.050MHz Graves Radar a VHF Beacon for Amateur Radio - PE1ITR |
| The 143.050MHz Graves Radar a VHF Beacon for Amateur Radio - PE1ITR http://www.itr-datanet.com/~pe1itr/graves/ http://www.itr-datanet.com/~pe1itr/pdf/The%20143.050MHz%20Graves%20Radar%20a%20VHF%20Beacon.pdf  |
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