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Your normal HF transceiver is fine.
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However you do need to calibrate your signal strength or S-meter. Absolute
signal strength is NOT necessary, but it is important to have the RELATIVE
signal strength to within 2-3dB. A detailed description as to how
to calibrate your S-meter is available here.
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A suitable radio contact, or partner(s), to work with .
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Some form of "data logger ". Pen and paper or a computer if you have one.
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