If you want to filter these signals, and are a ham, I use these on my Raspberry Pi https://www.qrp-labs.com/lpfkit.html https://www.qrp-labs.com/lpfkit.html and

If you want to filter these signals, and are a ham, I use these on my Raspberry Pi https://www.qrp-labs.com/lpfkit.html https://www.qrp-labs.com/lpfkit.html and have been heard all around the US daily, and also across both oceans a few times without an amp.