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https://sourceforge.net/projects/jt65-hf/

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http://www.dxsoft.com/en/products/truetty/

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https://winlink.org/ClientSoftware

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https://physics.princeton.edu//pulsar/K1JT/wspr.html

https://www.eham.net/

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http://www.arrl.org/new-ham-resources

https://www.rfcafe.com/references/resources/amateur-radio.htm