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Q code

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The Q code is a set of three letter code signals to be used in radiotelegraphy communications. They may have different meanings, depending on whether they are sent as a question or an answer. For example: the message "QRP" means "Shall I decrease transmitter power?", and a reply of "QRP" means "Yes, decrease your transmitter power". They may also be qualified by the word "no" or the letter "c" to negate their normal meaning. For example, a reply of "QRPC" would mean "No, do not decrease your transmitter power".

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