Amateur radio circuits
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30 sec
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2 min
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10 sec
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70 sec
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2 min
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5 min
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5 min
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66 sec
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40 min
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13 sec
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2 min
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2 min
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5 min
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10 min
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5 min
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39 sec
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27 sec
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8 min
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20 min
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5 min
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41 sec
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14 min
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13 min
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75 sec
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64 sec
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13 min
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4 min